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Improve superpmi-asmdiffs AzDO pipeline robustness #61819

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Nov 19, 2021
Merged

Improve superpmi-asmdiffs AzDO pipeline robustness #61819

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Improve superpmi-asmdiffs AzDO pipeline robustness
BruceForstall Nov 18, 2021
8b6cba3
Remove unneeded `success` variable from jitrollingbuild.py
BruceForstall Nov 19, 2021
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21 changes: 18 additions & 3 deletions src/coreclr/scripts/superpmi_asmdiffs_setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,9 @@ def main(main_args):

Args:
main_args ([type]): Arguments to the script

Returns:
0 on success, otherwise a failure code
"""

# Set up logging.
Expand Down Expand Up @@ -152,6 +155,7 @@ def main(main_args):
git_exe_tool = os.path.join(git_directory, "cmd", "git.exe")
if not os.path.isfile(git_exe_tool):
print('Error: `git` not found at {}'.format(git_exe_tool))
return 1

######## Get SuperPMI python scripts

Expand All @@ -167,18 +171,22 @@ def main(main_args):
os.makedirs(base_jit_directory)

print("Fetching history of `main` branch so we can find the baseline JIT")
run_command(["git", "fetch", "origin", "main"], source_directory, _exit_on_fail=True)
run_command(["git", "fetch", "--depth=500", "origin", "main"], source_directory, _exit_on_fail=True)
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why this change?

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@BruceForstall BruceForstall Nov 18, 2021 •
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This fixes the problem we were seeing not finding a baseline JIT, e.g., https://dev.azure.com/dnceng/public/_build/results?buildId=1475182&view=logs&j=011e1ec8-6569-5e69-4f06-baf193d1351e&t=bf6cf4cf-6432-59cf-d384-6b3bcf32ede2.

The pipelines only fetch with depth=20. If there aren't any JIT changes in those 20, we wouldn't find a baseline JIT. So, fetching a lot more makes it more likely to find a baseline JIT change.

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E.g., you can see the initial fetch here:

https://dev.azure.com/dnceng/public/_build/results?buildId=1475182&view=logs&j=011e1ec8-6569-5e69-4f06-baf193d1351e&t=01b23941-a81d-5e8f-0e4b-5c0fce1bb894

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My impression was that git fetch origin main (without --depth argument) would fetch the entire history. Doesn't how it work?

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@BruceForstall BruceForstall Nov 18, 2021 •
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Well, I'm no expert, but it appears the answer is "no". It appears that the first fetch possibly creates a "shallow" repo and you either need to expand that by fetching with a larger depth, or use fetch --unshallow to expand it. E.g., from the fetch docs:

--depth=<depth> Limit fetching to the specified number of commits from the tip of each remote branch history. If fetching to a shallow repository created by git clone with --depth=<depth> option (see git-clone(1)), deepen or shorten the history to the specified number of commits. Tags for the deepened commits are not fetched.


# Note: we only support downloading Windows versions of the JIT currently. To support downloading
# non-Windows JITs on a Windows machine, pass `-host_os <os>` to jitrollingbuild.py.
print("Running jitrollingbuild.py download to get baseline")
print("Running jitrollingbuild.py download to get baseline JIT")
jit_rolling_build_script = os.path.join(superpmi_scripts_directory, "jitrollingbuild.py")
_, _, return_code = run_command([
python_path,
os.path.join(superpmi_scripts_directory, "jitrollingbuild.py"),
jit_rolling_build_script,
"download",
"-arch", arch,
"-target_dir", base_jit_directory],
source_directory)
if return_code != 0:
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You need to make sure that you return the actual error_code from jitrollingbuild.py file. Currently it always return success.

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It turns out that doesn't matter: jitrollingbuild.py error model currently is to throw an exception, and that leads to a process error code of 1. I started changing jitrollingbuild.py, then realized it wasn't necessary.

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Got it. Can you remove the unused success = True from the jitrollingbuild.py then?

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Done

print('{} failed with {}'.format(jit_rolling_build_script, return_code))
return return_code

######## Get diff JIT

Expand Down Expand Up @@ -238,6 +246,11 @@ def main(main_args):
# Details: https://bugs.python.org/issue26660
print('Ignoring PermissionError: {0}'.format(pe_error))

jit_analyze_tool = os.path.join(jit_analyze_build_directory, "jit-analyze.exe")
if not os.path.isfile(jit_analyze_tool):
print('Error: {} not found'.format(jit_analyze_tool))
return 1

######## Set pipeline variables

helix_source_prefix = "official"
Expand All @@ -249,6 +262,8 @@ def main(main_args):
set_pipeline_variable("Creator", creator)
set_pipeline_variable("HelixSourcePrefix", helix_source_prefix)

return 0


if __name__ == "__main__":
args = parser.parse_args()
Expand Down