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sync: Warn about excessive job counts

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Warn users if the effective job count specified via `-j`,
`--jobs-network`, or `--jobs-checkout` exceeds a threshold
(currently 100). This encourages users to use more reasonable
values.

Bug: 406868778
Bug: 254914814
Change-Id: I116e2bbaf3dc824c04d1b2fbe52cf9ca5be77b9a
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/466801
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Gavin Mak <gavinmak@google.com>
Tested-by: Gavin Mak <gavinmak@google.com>
This commit is contained in:
Gavin Mak 2025-04-09 13:59:27 -07:00 committed by LUCI
parent 3667de1d0f
commit daebd6cbc2
1 changed files with 20 additions and 0 deletions
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20
subcmds/sync.py
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@ -350,6 +350,8 @@ later is required to fix a server side protocol bug.
# value later on.
PARALLEL_JOBS = 0
_JOBS_WARN_THRESHOLD = 100
def _Options(self, p, show_smart=True):
p.add_option(
"--jobs-network",
@ -1728,6 +1730,24 @@ later is required to fix a server side protocol bug.
opt.jobs_network = min(opt.jobs_network, jobs_soft_limit)
opt.jobs_checkout = min(opt.jobs_checkout, jobs_soft_limit)
# Warn once if effective job counts seem excessively high.
# Prioritize --jobs, then --jobs-network, then --jobs-checkout.
job_options_to_check = (
("--jobs", opt.jobs),
("--jobs-network", opt.jobs_network),
("--jobs-checkout", opt.jobs_checkout),
)
for name, value in job_options_to_check:
if value > self._JOBS_WARN_THRESHOLD:
logger.warning(
"High job count (%d > %d) specified for %s; this may "
"lead to excessive resource usage or diminishing returns.",
value,
self._JOBS_WARN_THRESHOLD,
name,
)
break
def Execute(self, opt, args):
errors = []
try: