test: increase spin for eventloop test on s390

It was excluded as it was failing intermittently. Likely
that s390 was just so fast times were rounded down to 0.

Increase the spin time on s390x only.

Signed-off-by: Michael Dawson <midawson@redhat.com>

Author: mhdawson

test/sequential/sequential.status

@@ -49,10 +49,6 @@ test-tls-securepair-client: PASS, FLAKY
 # https://github.com/nodejs/node/issues/49933
 test-watch-mode-inspect: SKIP
 
-[$arch==s390x]
-# https://github.com/nodejs/node/issues/41286
-test-performance-eventloopdelay: PASS, FLAKY
-
 [$system==linux && $arch==ppc64]
 # https://github.com/nodejs/node/issues/50740
 test-single-executable-application-assets-raw: PASS, FLAKY

test/sequential/test-performance-eventloopdelay.js

@@ -3,6 +3,7 @@
 
 const common = require('../common');
 const assert = require('assert');
+const os = require('os');
 const {
   monitorEventLoopDelay
 } = require('perf_hooks');
@@ -51,9 +52,13 @@ const { sleep } = require('internal/util');
 }
 
 {
+  const s390x = os.arch() === 's390x';
   const histogram = monitorEventLoopDelay({ resolution: 1 });
   histogram.enable();
   let m = 5;
+  if (s390x) {
+    m = m * 2;
+  }
   function spinAWhile() {
     sleep(1000);
     if (--m > 0) {