[CUDA] auto detect compatibility when arch is not passed

include/tvm/runtime/device_api.h

@@ -18,7 +18,8 @@ namespace runtime {
 enum DeviceAttrKind : int {
   kExist = 0,
   kMaxThreadsPerBlock = 1,
-  kWarpSize = 2
+  kWarpSize = 2,
+  kComputeVersion = 3
 };
 
 /*! \brief Number of bytes each allocation must align to */

python/tvm/_ffi/runtime_ctypes.py

@@ -131,6 +131,20 @@ def warp_size(self):
         return _api_internal._GetDeviceAttr(
             self.device_type, self.device_id, 2)
 
+    @property
+    def compute_version(self):
+        """Get compute verison number in string.
+
+        Currently used to get compute capability of CUDA device.
+
+        Returns
+        -------
+        version : str
+            The version string in `major.minor` format.
+        """
+        return _api_internal._GetDeviceAttr(
+            self.device_type, self.device_id, 3)
+
     def sync(self):
         """Synchronize until jobs finished at the context."""
         check_call(_LIB.TVMSynchronize(self.device_type, self.device_id, None))

python/tvm/contrib/cc.py

@@ -39,11 +39,8 @@ def create_shared(output,
     if options:
         cmd += options
 
-    args = ' '.join(cmd)
     proc = subprocess.Popen(
-        args, shell=True,
-        stdout=subprocess.PIPE,
-        stderr=subprocess.STDOUT)
+        cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     (out, _) = proc.communicate()
 
     if proc.returncode != 0:

python/tvm/contrib/nvcc.py

@@ -1,12 +1,16 @@
 # pylint: disable=invalid-name
 """Utility to invoke nvcc compiler in the system"""
 from __future__ import absolute_import as _abs
-import sys
+
 import subprocess
 from . import util
+from .. import ndarray as nd
 
-def compile_cuda(code, target="ptx", arch=None,
-                 options=None, path_target=None):
+def compile_cuda(code,
+                 target="ptx",
+                 arch=None,
+                 options=None,
+                 path_target=None):
     """Compile cuda code with NVCC from env.
 
     Parameters
@@ -39,32 +43,32 @@ def compile_cuda(code, target="ptx", arch=None,
 
     with open(temp_code, "w") as out_file:
         out_file.write(code)
-    if target == "cubin" and arch is None:
-        raise ValueError("arch(sm_xy) must be passed for generating cubin")
+
+    if arch is None:
+        if nd.gpu(0).exist:
+            # auto detect the compute arch argument
+            arch = "sm_" + "".join(nd.gpu(0).compute_version.split('.'))
+        else:
+            raise ValueError("arch(sm_xy) is not passed, and we cannot detect it from env")
 
     file_target = path_target if path_target else temp_target
     cmd = ["nvcc"]
     cmd += ["--%s" % target, "-O3"]
-    if arch:
-        cmd += ["-arch", arch]
+    cmd += ["-arch", arch]
     cmd += ["-o", file_target]
 
     if options:
         cmd += options
     cmd += [temp_code]
-    args = ' '.join(cmd)
 
     proc = subprocess.Popen(
-        args, shell=True,
-        stdout=subprocess.PIPE,
-        stderr=subprocess.STDOUT)
+        cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+
     (out, _) = proc.communicate()
 
     if proc.returncode != 0:
-        sys.stderr.write("Compilation error:\n")
-        sys.stderr.write(str(out))
-        sys.stderr.flush()
-        cubin = None
-    else:
-        cubin = bytearray(open(file_target, "rb").read())
-    return cubin
+        msg = "Compilation error:\n"
+        msg += out
+        raise RuntimeError(msg)
+
+    return bytearray(open(file_target, "rb").read())

src/runtime/cuda/cuda_device_api.cc

@@ -40,6 +40,17 @@ class CUDADeviceAPI final : public DeviceAPI {
             &value, cudaDevAttrWarpSize, ctx.device_id));
         break;
       }
+      case kComputeVersion: {
+        std::ostringstream os;
+        CUDA_CALL(cudaDeviceGetAttribute(
+            &value, cudaDevAttrComputeCapabilityMajor, ctx.device_id));
+        os << value << ".";
+        CUDA_CALL(cudaDeviceGetAttribute(
+            &value, cudaDevAttrComputeCapabilityMinor, ctx.device_id));
+        os << value;
+        *rv = os.str();
+        return;
+      }
     }
     *rv = value;
   }

src/runtime/metal/metal_device_api.mm

@@ -39,6 +39,7 @@
       *rv = 1;
       break;
     }
+    case kComputeVersion: return;
     case kExist: break;
   }
 }

src/runtime/opencl/opencl_device_api.cc

@@ -45,6 +45,7 @@ void OpenCLWorkspace::GetAttr(
       *rv = 1;
       break;
     }
+    case kComputeVersion: return;
     case kExist: break;
   }
 }

src/runtime/rocm/rocm_device_api.cc

@@ -44,6 +44,7 @@ class ROCMDeviceAPI final : public DeviceAPI {
         value = 64;
         break;
       }
+      case kComputeVersion: return;
     }
     *rv = value;
   }

topi/python/topi/transform.py

@@ -143,7 +143,7 @@ def _compute(begin, *indices):
         begin_ids = [seg_size * i for i in range(indices_or_sections)]
     elif isinstance(indices_or_sections, (tuple, list)):
         assert tuple(indices_or_sections) == tuple(sorted(indices_or_sections)),\
-            "Should be sorted, recieved %s" %str(indices_or_sections)
+            "Should be sorted, recieved %s" % str(indices_or_sections)
         begin_ids = [0] + list(indices_or_sections)
     else:
         raise NotImplementedError

topi/recipe/broadcast/test_broadcast_map.py

@@ -12,7 +12,7 @@
 
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
-    ptx = nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_52"])
+    ptx = nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 

topi/recipe/conv/depthwise_conv2d_test.py

@@ -13,7 +13,7 @@
 
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
-    ptx = nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_37"]) # 37 for k80(ec2 instance)
+    ptx = nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 def write_code(code, fname):

topi/recipe/conv/test_conv2d_hwcn_map.py

@@ -12,7 +12,7 @@
 
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
-    ptx = nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_37"])
+    ptx = nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 def write_code(code, fname):

topi/recipe/gemm/cuda_gemm_square.py

@@ -9,7 +9,7 @@
 
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
-    ptx =  nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_52"])
+    ptx =  nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 def write_code(code, fname):

topi/recipe/reduce/test_reduce_map.py

@@ -12,7 +12,7 @@
 
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
-    ptx = nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_52"])
+    ptx = nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 

topi/recipe/rnn/lstm.py

@@ -17,7 +17,7 @@
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
     """Use nvcc compiler for better perf."""
-    ptx =  nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_52"])
+    ptx =  nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 def write_code(code, fname):

topi/recipe/rnn/matexp.py

@@ -24,7 +24,7 @@
 @tvm.register_func
 def tvm_callback_cuda_compile(code):
     """Use nvcc compiler for better perf."""
-    ptx =  nvcc.compile_cuda(code, target="ptx", options=["-arch=sm_52"])
+    ptx =  nvcc.compile_cuda(code, target="ptx")
     return ptx
 
 def write_code(code, fname):