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Re: comparing parallel test runs


Marek Polacek <polacek@redhat.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:
>> > Hi folks.
>> > 
>> > 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

first?

-Andi


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