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Re: comparing parallel test runs
On 05/17/2017 11:19 PM, Andi Kleen wrote:
Marek Polacek <email@example.com> writes:
On Wed, May 17, 2017 at 09:13:40AM -0600, Jeff Law wrote:
On 05/17/2017 04:23 AM, Aldy Hernandez wrote:
I've been having troubles comparing the results of different test runs
for quite some time, and have finally decided to whine about it. Perhaps
someone can point out to whatever I may be doing wrong.
I generally do "make check -k -j60" on two different trees and compare
Make sure you've got Andi's patch installed and report back. It's
supposed to help with smaller -j loads, but it's unclear if it's enough
to address the problems with higher loads like you're using.
I'm still seeing spurious tree-prof failures there (with -j48).
Do they go away if you run first (as root)
echo 5000 > /proc/sys/kernel/perf_event_mlock_kb
I tried three runs of the profiling tests and the failures did
clear up with the increased setting.