metal : tuning Flash-Attention kernel across M-chips #27668

ggerganov · 2026-08-24T17:05:29Z

ggerganov
Aug 24, 2026
Maintainer

jruhe-adesso · 2026-08-25T13:40:14Z

jruhe-adesso
Aug 25, 2026

So there is no need to differentiate between SoC-sub-types, e.g. M5 Pro with 16 GPU Core vs 20 GPU Cores?

1 reply

ggerganov Aug 25, 2026
Maintainer Author

Not sure - keeping it simple for now.

SerayaEryn · 2026-08-26T05:47:37Z

SerayaEryn
Aug 26, 2026

Here are the rows from my M5 Pro (including q4_0; I hope that's fine):

fa_vec_rows F16,q4_0,q8_0 M5 Pro (20 GPU cores)

{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 1, 4 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 2, 4 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 3, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 32, 32, 3, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 64, 64, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 64, 64, 1, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 64, 64, 3, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 64, 64, 3, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 64, 64, 3, 4 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 96, 96, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 128, 128, -1, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 128, 128, 1, 4 }, { 1, 1 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 192, 192, -1, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 192, 192, 1, 2 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 192, 128, 2, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 192, 128, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 192, 128, 3, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 256, 256, -1, 0 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 256, 256, -1, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 256, 256, 1, 4 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 320, 256, 3, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 320, 256, -1, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 320, 256, 1, 2 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 512, 512, 2, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 512, 512, 2, 3 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 512, 512, 3, 3 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, -1, 1 }, { 2, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, 1, 1 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, 1, 2 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, 1, 3 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, 1, 4 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_F16, 576, 512, 2, 2 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 32, 32, -1, 1 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 32, 32, 1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 32, 32, 1, 4 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 32, 32, 2, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 32, 32, 3, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 64, 64, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 64, 64, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 64, 64, 1, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 96, 96, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 96, 96, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 96, 96, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 96, 96, 3, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 128, 128, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 128, 128, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 128, 128, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, -1, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, 1, 3 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, 2, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, 2, 3 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, 2, 4 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 192, 3, 4 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 128, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 128, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 128, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 192, 128, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 256, 256, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 256, 256, -1, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 320, 256, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 320, 256, -1, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 512, 512, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 512, 512, 1, 0 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 512, 512, -1, 1 }, { 1, 2 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 512, 512, 2, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q4_0, 512, 512, 2, 3 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 1, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 1, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 2, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 2, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 3, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 32, 32, 3, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 64, 64, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 64, 64, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 64, 64, 3, 2 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 64, 64, 3, 3 }, { 4, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 96, 96, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 96, 96, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 96, 96, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 128, 128, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 128, 128, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 128, 128, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 128, 128, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 192, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 192, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 192, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 192, 2, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 192, 3, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 128, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 128, -1, 1 }, { 2, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 128, 1, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 192, 128, 3, 2 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 256, 256, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 256, 256, -1, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 320, 256, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 320, 256, -1, 1 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 576, 512, -1, 0 }, { 1, 4 } },
{ { GGML_METAL_DEVICE_M5_PRO, GGML_TYPE_Q8_0, 576, 512, -1, 1 }, { 1, 4 } },

2 replies

ggerganov Aug 28, 2026
Maintainer Author

Thanks. Consider providing a benchmark for #4167

forforever73 Aug 31, 2026
Collaborator

@SerayaEryn Could you share the stderr file (fa_vec_sweep.log) as well? Thanks!

TeeAaTeeUu · 2026-08-27T11:56:57Z

TeeAaTeeUu
Aug 27, 2026

Here for M3 Max on MacBook Pro (64GB). Ran on 'low power mode': if that's a problem, I can rerun the tuning if needed.

fa_vec_rows.txt

    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 1, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 32, 32, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, 3, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, 3, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, 3, 3 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 96, 96, 3, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 128, 128, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 128, 128, 1, 4 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 128, 128, 2, 4 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 192, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 192, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 192, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 128, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 128, 1, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 128, 1, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 192, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 256, 256, -1, 0 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 256, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 256, 256, 2, 3 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 320, 256, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 320, 256, 3, 0 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 320, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 2, 0 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 3, 0 }, { 4, 1 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 1, 3 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 2, 1 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 2, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 3, 1 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 512, 512, 3, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 576, 512, 2, 0 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 576, 512, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 576, 512, 2, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_F16, 576, 512, 3, 1 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, 1, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 64, 64, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, 1, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 96, 96, 3, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 128, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 1, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 192, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 192, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 256, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 320, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 320, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 512, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 512, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 576, 512, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 576, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 576, 512, 1, 1 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M3_MAX, GGML_TYPE_Q8_0, 576, 512, 1, 4 }, { 1, 2 } },

Why low power mode?

At least for me, the 99c temperatures for CPU and GPU that automatic mode settles on are too high. For my laptop and environment that means ~110w sustained power usage, maybe +80% speed boost on tokens per second, but also high fan noise and increased wattage per token.

Low power mode settles on ~50w power usage, keeps low fan speed / low noise, and ~75c temperatures for CPU / GPU cores. Still a nice laptop to work next to without headphones.

7 replies

TeeAaTeeUu Aug 29, 2026

Ran pre-tuning llama-bench at #4167 (reply in thread) .

Rerunning ggml-metal-tuning multiple times seemed to always gave a tiny bit different results with some variations, for both automatic/default mode and for low power mode. Also with automatic mode there were only ~47 lines of output, while for low power mode there were ~91 lines of output. Low power mode also gave always like 26 cells excluded as untrusted (see DROP lines above).

I tried my best rebuilding and llama-benching the different tunings multiple times across the both modes. But couldn't get any meaningful differences for positive or negative. If you can point me to further testing, that would be helpful. Or are we already so close to memory bandwidth limits, that work-done is no longer the limiting factor?

forforever73 Aug 31, 2026
Collaborator

@TeeAaTeeUu The larger number of output lines and the 26 untrusted cells in low power mode may suggest that this mode is more susceptible to thermal drift and noise. Do you still have the stderr file, fa_vec_sweep.log, available? If so, could you share them, preferably for both low power and automatic modes? I’d like to try analyzing the results. Thanks!

TeeAaTeeUu Aug 31, 2026

Sure, here are both logs and output @forforever73 for M3 Max with --dtype f16,q8_0:

fa_vec_rows_automatic_2.txt
fa_vec_sweep_automatic_2.log

fa_vec_rows_low_2.txt
fa_vec_sweep_low_2.log

TeeAaTeeUu Sep 4, 2026

M3 Max rows and logs with --dtype q4_0,q4_1,q5_0,q5_1 as requested, hopefully still helpful for the gpu_family analysis and approach: @forforever73 @nikwen

fa_vec_rows_automatic_q4_q5.txt
fa_vec_sweep_automatic_q4_q5.log

nikwen Sep 4, 2026
Collaborator

Thank you! PR to add them: #28373

infinitewarp · 2026-08-27T19:19:40Z

infinitewarp
Aug 27, 2026

I ran ggml-metal-tuning last night on my M4 Pro, and I created the PR hopefully to save you a few extra steps: #27824

LMK if there's anything else I can do to help from my M4 Pro system or if you want more than just f16,q8_0, and I'll be happy to rerun and add more.

3 replies

nikwen Aug 28, 2026
Collaborator

I saw this comment about Q4_0/Q4_1/Q5_0/Q5_1. Do you want to run that or should I? I could leave it running tonight.

(The command would just be ./build/bin/ggml-metal-tuning fa-vec --dtype q4_0,q4_1,q5_0,q5_1 > fa_vec_rows.txt 2> fa_vec_sweep.log, right?)

nikwen Aug 28, 2026
Collaborator

Quick update: the Q4_0/Q4_1/Q5_0/Q5_1 run has been running on my machine for a few hours already. Will open a PR when it finishes.

nikwen Aug 28, 2026
Collaborator

PR: #27915

Strongtut · 2026-08-28T12:48:44Z

Strongtut
Aug 28, 2026

Here's the full ggml-metal-tuning sweep for an M4 (not pro). PR #27875
If there's other tests needed on this hardware, let me know!

fa_vec_rows.txt

    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 1, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 2, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 32, 32, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 64, 64, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 64, 64, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 96, 96, 1, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 96, 96, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 96, 96, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 128, 128, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 128, 128, 1, 2 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 128, 128, 1, 4 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 128, 128, 2, 2 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 128, 128, 2, 4 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 192, 3, 0 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 192, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 192, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 128, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 128, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 192, 128, 1, 4 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 256, 256, -1, 0 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 256, 256, 3, 0 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 256, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 320, 256, 3, 0 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 320, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 512, 512, 3, 0 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 512, 512, 3, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 512, 512, 3, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_F16, 512, 512, 3, 3 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 32, 32, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, 1, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 64, 64, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 128, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 128, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 128, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 128, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 192, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 192, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 256, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 320, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 320, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 512, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 512, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 1, 1 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 1, 3 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_0, 576, 512, 1, 4 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 32, 32, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, 1, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 64, 64, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 96, 96, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 128, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 128, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 128, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 128, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 192, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 192, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 256, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 320, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 320, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 1, 1 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 1, 3 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q4_1, 576, 512, 1, 4 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 64, 64, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 64, 64, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 64, 64, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 64, 64, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 96, 96, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 96, 96, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 96, 96, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 96, 96, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 1, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 1, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 128, 128, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 192, 192, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 192, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 256, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 256, 256, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 256, 256, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 320, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 320, 256, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 320, 256, 2, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 320, 256, 3, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 512, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 512, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 576, 512, 2, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 576, 512, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 576, 512, 2, 3 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_0, 576, 512, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 64, 64, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 64, 64, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 64, 64, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 64, 64, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 96, 96, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 96, 96, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 96, 96, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 96, 96, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, 1, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 128, 128, 3, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 192, 192, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 192, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 256, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 256, 256, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 256, 256, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 320, 256, -1, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 320, 256, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 320, 256, 1, 4 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 320, 256, 2, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 320, 256, 3, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 512, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 512, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 576, 512, 2, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 576, 512, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 576, 512, 2, 3 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q5_1, 576, 512, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 32, 32, -1, 1 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 32, 32, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 32, 32, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 32, 32, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 32, 32, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, 1, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 64, 64, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 128, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 128, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 128, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 192, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 192, 128, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 256, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 256, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 320, 256, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 320, 256, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 512, 512, -1, 0 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 512, 512, -1, 1 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 576, 512, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 576, 512, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M4, GGML_TYPE_Q8_0, 576, 512, -1, 1 }, { 1, 4 } },

0 replies

jhen0409 · 2026-08-29T07:12:50Z

jhen0409
Aug 29, 2026
Collaborator

I opened PR #27932 for M1 Max, the run probably took half a day.

I can also provide a sweep of A18 Pro (MacBook Neo), since it's not on the list, please let me know if you need it.

2 replies

nikwen Aug 29, 2026
Collaborator

An A18 Pro sweep would be great, too. Thanks for the M1 Max PR!

nikwen Aug 29, 2026
Collaborator

Also maybe a benchmark for #4167 for the A18 Pro.

addianto · 2026-08-29T13:16:24Z

addianto
Aug 29, 2026

I just opened a draft PR (#27963) for M3 Pro. Currently in the process of finetuning Q4_0, Q4_1, Q5_0, and Q5_1. F16 and Q8_0 already done in the PR.

1 reply

addianto Aug 29, 2026

Just finished the tuning for remaining dtype (Q4_0, Q4_1, Q5_0, Q5_1). The PR is now ready for review.

1RAFAL · 2026-08-30T09:54:56Z

1RAFAL
Aug 30, 2026

Here are rows for M2 Max (30c).

fa_vec_rows.txt

    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 32, 32, 1, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 32, 32, 2, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 1, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 3, 2 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 3, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 64, 64, 3, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 96, 96, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 128, 128, 3, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 128, 128, 3, 3 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 192, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 2, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 192, 128, 3, 1 }, { 2, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 320, 256, 2, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 320, 256, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 320, 256, 2, 3 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 320, 256, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 512, 512, 2, 0 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 512, 512, 2, 1 }, { 4, 1 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_F16, 512, 512, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 32, 32, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 32, 32, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 32, 32, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 32, 32, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 32, 32, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 1, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 2, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 3, 2 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 64, 64, 3, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, 1, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, 1, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, 2, 2 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 96, 96, 2, 4 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 128, 128, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 128, 128, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 128, 128, 2, 3 }, { 4, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 128, 128, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 128, 128, 3, 3 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 192, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 192, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 128, 1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 128, 3, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 128, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 128, 3, 3 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 192, 128, 3, 4 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 256, 256, -1, 0 }, { 1, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 256, 256, -1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 256, 256, 2, 2 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 256, 256, 2, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 1, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 1, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 2, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 2, 2 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 2, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 2, 4 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 3, 1 }, { 2, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 320, 256, 3, 3 }, { 4, 2 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 512, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 512, 512, -1, 1 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 512, 512, 3, 1 }, { 1, 1 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 576, 512, -1, 0 }, { 1, 4 } },
    { { GGML_METAL_DEVICE_M2_MAX, GGML_TYPE_Q8_0, 576, 512, -1, 1 }, { 1, 4 } },

2 replies

forforever73 Aug 31, 2026
Collaborator

Thanks, could you share the stderr file (fa_vec_sweep.log) as well?

1RAFAL Aug 31, 2026

Sure, here you go.
fa_vec_sweep.log

ggerganov · 2026-08-30T11:25:45Z

ggerganov
Aug 30, 2026
Maintainer Author

Now that we have plenty of data across the hardware spectrum, we can try to model the optimum Q and NE. The chip type could likely be replaced with the ratio of GPU cores/memory bandwidth times a scaling factor (derived from #4167).

1 reply

forforever73 Aug 31, 2026
Collaborator

Right, I’ll first collect the raw logs and see if we can try to build a model from the data.

ozgursoy · 2026-08-31T12:54:43Z

ozgursoy
Aug 31, 2026

Here M1 Ultra #28088

0 replies

init-22 · 2026-09-02T10:12:17Z

init-22
Sep 2, 2026

PR for M3 #28236

0 replies

nikwen · 2026-09-02T18:21:39Z

nikwen
Sep 2, 2026
Collaborator

We now have data on all chips that can currently be bought. 🎉

Some quantizations are still missing:

Device	Present	Missing
M2 Max	F16, Q8_0	Q4_0, Q4_1, Q5_0, Q5_1
M3	F16, Q8_0	Q4_0, Q4_1, Q5_0, Q5_1
M3 Max	F16, Q8_0	Q4_0, Q4_1, Q5_0, Q5_1
M5	F16, Q8_0	Q4_0, Q4_1, Q5_0, Q5_1
M5 Pro	F16, Q4_0, Q8_0	Q4_1, Q5_0, Q5_1

If anyone still has time to run those, that would be awesome!

The tuning command for those is ./build/bin/ggml-metal-tuning fa-vec --dtype q4_0,q4_1,q5_0,q5_1 > fa_vec_rows.txt 2> fa_vec_sweep.log.

4 replies

su3su2u1 Sep 5, 2026

These should be the missing rows for the M2max.

fa_vec_rows.txt

nikwen Sep 5, 2026
Collaborator

@su3su2u1 Thank you very much! PR: #28458

Would you be able to also share the fa_vec_sweep.log? It's necessary for the analysis from #27668 (comment).

su3su2u1 Sep 5, 2026

Here is the log:
fa_vec_sweep.log

nikwen Sep 6, 2026
Collaborator

Thanks! CC @forforever73.

ozgursoy · 2026-09-02T22:32:35Z

ozgursoy
Sep 2, 2026

It's amazing how powerful open source is. We reached the goal in such a short time without having to buy all those devices, which is truly an incredible force. Thanks to everyone who contributed.

Let's just hope we're not scripting our own end. 🥳

0 replies

forforever73 · 2026-09-03T09:51:19Z

forforever73
Sep 3, 2026
Collaborator

I analyzed the raw fa-vec tuner logs for 10 devices: A18 Pro, M1, M1 Ultra, M2, M2 Pro, M3 Pro, M3 Ultra, M4, M4 Pro and M4 Max. I could not find complete logs covering all data types for the other devices; if anyone has them, please share them.

The logs contain absolute timings for every candidate (Q, NE), not only the winner. A measured case is one combination of device, data type, head dimensions, KV length (ne11) and query rows (ne01). There are 900 input-shape groups in total. Across the 10 devices, this gives 21,581 measured cases.

For each input-shape group, I kept a (Q, NE) candidate only when it was at least as fast as baseline in every measurement used for that row and had at least 2% median speedup. Otherwise, the row uses baseline. The device-specific tuning result is the full form represented by the current table: each device gets its own selected configuration for each input-shape group. The other two forms share those configurations across devices: one shared table uses the same (Q, NE) entry for a given input shape on every device, while the two-table version uses one table for Apple7/8 devices (M1/M2) and another for Apple9 devices (M3/M4/A18 Pro).

table form	geometric-mean speedup vs baseline	speed retained vs device-specific tuning
one shared table for all devices	1.302x	92.6%
two tables selected by `gpu_family`: Apple7/8 vs Apple9	1.382x	98.3%
four generation-specific tables	1.393x	99.1%
device-specific tuning	1.406x	100%

Grouping the measurements by GPU family reveals a clear generation effect in addition to the shape effect. The M1/M2 and M3/M4/A18 Pro groups select the same configuration in 547 of 900 input-shape groups. In the remaining 353 groups, the newer devices tend to use a larger Q and a smaller NE, while the older devices tend to use a smaller Q and a larger NE. This indicates that gpu_family captures much of the device-dependent part of the optimum.

I also tested the proposed cores / bandwidth ratio, but it does not separate these devices well. Its values are:

M4 Max 0.073  M4 Pro 0.073  M1 Ultra 0.080  M4 0.083  M2 Pro 0.095
M2 0.100     M3 Ultra 0.100  M1 0.118       M3 Pro 0.120

This is a narrow 1.64x range with a non-monotonic order: M4 Max is at the low end despite being the fastest chip, while M1 and M3 Pro are at the high end. For comparison, measured q8 prompt-processing throughput per GPU core (q8 PP / GPU core, from the benchmark data in #4167) follows the generations much more closely:

M1 14.7  M1 Ultra 16.3  M2 Pro 18.1  M2 18.1  M3 Ultra 18.6
M3 Pro 19.1  M4 Max 22.3  M4 22.4  M4 Pro 22.5

In this dataset, q8 PP / GPU core is effectively a proxy for GPU generation, and gpu_family provides the same useful split directly.

As an end-to-end check, I compared an untuned build, the existing device-specific table, and the two-family-table version on M4 Max. The matrix covered 4 models, 2 KV types, 4 context depths and 2 draft settings (64 paired points). At context length 32768:

model	KV	untuned tok/s	device-specific tok/s	two-family tok/s	device-specific vs untuned	two-family vs device-specific
Llama-3.1-8B	f16	37.9	42.7	42.6	+12.6%	-0.1%
Llama-3.1-8B	q4_0	32.2	35.9	36.0	+11.4%	+0.3%
Qwen3-30B-A3B	f16	34.6	40.8	40.8	+18.1%	+0.0%
Qwen3-30B-A3B	q4_0	27.9	32.2	32.1	+15.1%	-0.1%

Based on these results, I suggest replacing the current fine-grained device table with tables keyed by gpu_family: either two groups (Apple7/8 vs Apple9) or one table per Apple GPU family. Feedback and discussion are welcome.

5 replies

nikwen Sep 3, 2026
Collaborator

Thanks for doing this work! This is so cool.

Tuning by GPU family sounds good to me (with or without families 7/8 grouped together; I don't care).
The 2% gain from device-specific tuning does not seem to be worth the extra complexity and effort.

It would be interesting to see how MTLGPUFamilyApple10 / M5 chips compare. (If you're reading this and have an M5 generation chip, please do a tuning run and share your fa_vec_sweep.log.)

ggerganov Sep 8, 2026
Maintainer Author

A table per family sounds good. But lets' first see how the M5 data fits in the model.

forforever73 Sep 8, 2026
Collaborator

I added data for three more devices: M5 Max (Apple10), M3 Max (Apple9) and M2 Max (Apple8).

table form	geometric-mean speedup vs baseline	speed retained vs device-specific tuning
one shared table for all devices	1.227x	87.2%
two tables: `<=Apple8` vs `>=Apple9`	1.355x	96.4%
one table per family: Apple7 / 8 / 9 / 10	1.386x	98.5%
device-specific tuning	1.406x	100%

The two-table form drops to 96.4% because of M5 Max. Its per-device optimum agrees with the shared Apple9 config on only 528 of 900 input-shape groups (59%), so M5 Max behaves as its own group rather than >=Apple9 group. M3 Max and M2 Max, by contrast, fit cleanly into their families.

So a table per family looks like the better choice. cc @ggerganov @nikwen

nikwen Sep 8, 2026
Collaborator

So a table per family looks like the better choice.

Sounds good to me. Thanks for running the analysis!

Side notes:

Device-specific tuning might not actually reach 100% either as each run seems to give slightly different results. So even more reason to just split by family.
Should we verify with another log from an M5 processor besides the M5 Max that it's still similar across M5-generation processors? (@ggerganov Do you have a device with an M5 or M5 Pro? Or do you know of any maintainer who does?)

ggerganov Sep 8, 2026
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Device-specific tuning might not actually reach 100% either as each run seems to give slightly different results.

Yes, the coarser per-family model can potentially smooth-out the noise fluctuations in the device-specific data and end-up better overall.

metal : tuning Flash-Attention kernel across M-chips #27668

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ggerganov Aug 24, 2026 Maintainer

Overview

Running the tuning

Reporting results

Devices collected so far

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