[test] Run tests on all Mac bots in the pool

Dropping the gpu:none dimension broadens the choice of Mac bots from
so far only 8-core VMs to also include 4-core and 12-core Mac Minis.

This CL adjusts the shard configs to account for adding
4-core Mac Minis to the choice.

We also skip a test that's slow only on 4-core bots.

No-Try: true
Bug: chromium:1174040,v8:11418
Change-Id: Ic0be0db197341b7b8f88eb30aa284c38b0e69609
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685164
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72623}

infra/testing/builders.pyl

@@ -668,46 +668,42 @@
     'swarming_dimensions' : {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
-      {'name': 'v8testing', 'shards': 4},
+      {'name': 'v8testing', 'shards': 8},
     ],
   },
   'v8_mac64_dbg_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
       {'name': 'mozilla'},
-      {'name': 'test262', 'variant': 'default', 'shards': 2},
-      {'name': 'v8testing', 'shards': 3},
-      {'name': 'v8testing', 'variant': 'extra', 'shards': 2},
+      {'name': 'test262', 'variant': 'default', 'shards': 4},
+      {'name': 'v8testing', 'shards': 6},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 6},
     ],
   },
   'v8_mac64_gc_stress_dbg_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
-      {'name': 'd8testing', 'test_args': ['--gc-stress'], 'shards': 4},
+      {'name': 'd8testing', 'test_args': ['--gc-stress'], 'shards': 6},
     ],
   },
   'v8_mac64_rel_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
       {'name': 'mozilla'},
-      {'name': 'test262', 'variant': 'default', 'shards': 2},
-      {'name': 'v8testing', 'shards': 2},
-      {'name': 'v8testing', 'variant': 'extra'},
+      {'name': 'test262', 'variant': 'default', 'shards': 3},
+      {'name': 'v8testing', 'shards': 3},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 3},
     ],
   },
   'v8_mac_arm64_rel_ng_triggered': {
@@ -1350,46 +1346,42 @@
     'swarming_dimensions': {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
       {'name': 'mozilla'},
-      {'name': 'test262', 'variant': 'default', 'shards': 2},
-      {'name': 'v8testing', 'shards': 2},
-      {'name': 'v8testing', 'variant': 'extra'},
+      {'name': 'test262', 'variant': 'default', 'shards': 3},
+      {'name': 'v8testing', 'shards': 3},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 3},
     ],
   },
   'V8 Mac64 - debug': {
     'swarming_dimensions': {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
       {'name': 'mozilla'},
-      {'name': 'test262', 'variant': 'default', 'shards': 2},
-      {'name': 'v8testing', 'shards': 4},
-      {'name': 'v8testing', 'variant': 'extra', 'shards': 2},
+      {'name': 'test262', 'variant': 'default', 'shards': 4},
+      {'name': 'v8testing', 'shards': 6},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 6},
     ],
   },
   'V8 Mac64 ASAN': {
     'swarming_dimensions': {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
-      {'name': 'v8testing', 'shards': 5},
+      {'name': 'v8testing', 'shards': 10},
     ],
   },
   'V8 Mac64 GC Stress': {
     'swarming_dimensions': {
       'cpu': 'x86-64',
       'os': 'Mac-10.15',
-      'gpu': 'none',
     },
     'tests': [
-      {'name': 'd8testing', 'test_args': ['--gc-stress'], 'shards': 4},
+      {'name': 'd8testing', 'test_args': ['--gc-stress'], 'shards': 6},
     ],
   },
   'V8 Mac - arm64 - release': {

test/mjsunit/mjsunit.status

@@ -856,6 +856,14 @@
   'wasm/externref-globals-liftoff': [SKIP],
 }], #'arch == riscv64 and variant == stress-incremental-marking'
 
+##############################################################################
+['system == macos', {
+  # TODO(machenbach): These tests are x25 slower on 4-core Mac Minis. They can
+  # be unskipped as soon as the pools only contain 8-core+ Macs.
+  'wasm/compare-exchange-stress': [SKIP],
+  'wasm/compare-exchange64-stress': [SKIP],
+}],  # 'system == macos'
+
 ##############################################################################
 ['system == windows', {
   # Too slow with turbo fan.