Collapse the build requests for NVidia NVPTX builders on Windows platforms.

[vvereschaka]

Summary

The NVPTX target builds take more time than expected between coming build requests and we get a large unprocessed queue for the builders on the Windows platform. Just lets collapsed the incoming build requests to reduce the build queue.

[gkistanova]

No need to specify True. Just remove the 'collapseRequests' param and let the default do its work.
It will handle clean flags, manual build requests and such cases for you.

[vvereschaka]

Updated the builder configurations - removed collapseRequests option. Also reduced a number of concurrent builds for the Windows worker to 1.

[gkistanova]

LGTM

buildbot/osuosl/master/config/builders.py

'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
                         "-DLLVM_LIT_ARGS=-vv --threads=32",
                         "-DLLVM_USE_LINKER=gold",
                         "-DBUILD_SHARED_LIBS=ON",
                         "-DLLVM_OPTIMIZED_TABLEGEN=ON"])},
 
     {'name' : "llvm-nvptx-nvidia-win",
     'tags'  : ["llvm", "nvptx"],
-    'collapseRequests': False,
     'workernames' : ["as-builder-8"],
     'builddir': "llvm-nvptx-nvidia-win",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaWithMSVCBuildFactory(
                     vs="autodetect",
                     depends_on_projects=["llvm"],
                     clean=True,
                     checks=["check-llvm"],
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=X86;NVPTX",
                         "-DLLVM_DEFAULT_TARGET_TRIPLE=nvptx-nvidia-cuda",
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
                         "-DLLVM_LIT_ARGS=-vv --threads=32",
                         "-DLLVM_OPTIMIZED_TABLEGEN=ON"])},
 
     {'name' : "llvm-nvptx64-nvidia-win",
     'tags'  : ["llvm", "nvptx"],
-    'collapseRequests': False,
     'workernames' : ["as-builder-8"],
     'builddir': "llvm-nvptx64-nvidia-win",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaWithMSVCBuildFactory(
                     vs="autodetect",
                     depends_on_projects=["llvm"],
                     clean=True,
                     checks=["check-llvm"],
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=X86;NVPTX",
                         "-DLLVM_DEFAULT_TARGET_TRIPLE=nvptx64-nvidia-cuda",
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
                         "-DLLVM_LIT_ARGS=-vv --threads=32",
                         "-DLLVM_OPTIMIZED_TABLEGEN=ON"])},
 
 ]

buildbot/osuosl/master/config/workers.py

return [
         create_worker("as-builder-6", properties={  # aarch64
                         'remote_test_host': 'jetson8.lab.llvm.org',
                         'remote_test_user': 'ubuntu'
                      },
                      max_builds=1),
 
         # NVPTX builders.
         # Ubuntu 22.04 LTS x86_64 Intel Xeon 6330 CPU 2Sx64Cx128LP @ 2.0GHz, 256GB RAM
-        create_worker("as-builder-7", properties={'jobs': 64}, max_builds=2),
+        create_worker("as-builder-7", properties={'jobs': 64}, max_builds=1),
         # Windows Server on Intel Xeon 6330 CPU 2Sx64Cx128LP @ 2.0GHz, 256GB RAM
-        create_worker("as-builder-8", max_builds=2),
+        create_worker("as-builder-8", max_builds=1),
 
         # Solaris 11
         create_worker("solaris11-amd64", properties={'jobs' : 8}, max_builds=1),
         create_worker("solaris11-sparcv9", properties={'jobs' : 8}, max_builds=1),
 
         # CentOS 7.8.1127 on Intel(R) Xeon(R) Gold 6126 CPU @ 2.60GHz, 96GB RAM
         create_worker("hpce-aurora2", properties={'jobs': 8}, max_builds=1),
         create_worker("hpce-ve-main", properties={'jobs': 8}, max_builds=1),