On 8/6/19 2:51 AM, Martin Jansa wrote:
This is the same reproducer I am using in:
https://bugzilla.yoctoproject.org/show_bug.cgi?id=12434
but with this SRCREV I haven't reproduced it yet in first 500
iterations, so it's definitely improving for me (used to reproduce it at
least once in first 500 iterations)
Now I'm testing the reproducer with "qmake -install qinstall".
Any update Martin?
Using a variation of Juro's script and adding a little stress-ng load,
it _seems_ that I can make the problem happen more quickly than without
system stress but it's a shared system so _seems_ is underlined.
Using stress-ng was supposed to be a quick check to see if I could
get the reproducer down to minutes rather than around an hour.
Results are promising so I'll continue to use this approach as
I add debugging to pseudo and add an inline, immediate check in
the context of:
http://cgit.openembedded.org/openembedded-core/tree/meta/recipes-core/glibc/glibc-locale.inc?h=master#n72
to see if the UID/GID are equal to my UID/GID.
Test runs summaries are below.
../Randy
cat src/distro/yocto/b/uid-diff/glibc-locale-stress
#!/bin/bash
fname='glibc-locale_master_august13'
max=100
for (( i=1; i <= $max; i++ ))
do
echo "$i/$max ${fname}_$i.log"
bitbake glibc-locale -c cleanall 2>&1 > /dev/null
# add some stress
stress-ng -t 1000 --switch 8 --switch-freq 50000 &
bitbake glibc-locale 2>&1 > ${fname}_$i.log
# Destress
killall -9 stress-ng
if grep -q "host-user-contaminated" ${fname}_$i.log; then
echo "error !"
exit 2
#else
#rm ${fname}_$i.log
fi
done
On a (shared) system where lscpu shows 128 cores
and no stress:
Trial Iteration Error
1 44
2 19
stress-ng -t 1000 --switch 8 --switch-freq 50000
50000 was just the frequency that generated a high enough
but not too high load. On this systems, each process used ~30% of a cpu.
Trial Iteration Error
1 3
2 18
stress-ng -t 1000 --switch 16 --switch-freq 50000
Trial Iteration Error
1 3
2 1
3 11
stress-ng -t 1000 --switch 32 --switch-freq 50000
Trial Iteration Error
1 2
2 9
3 8
stress-ng -t 1000 --switch 64 --switch-freq 50000
Trial Iteration Error
1 4
2 13
3 >6
stress-ng -t 1000 --mq 64
128 processes using 98% cpu each
Trial Iteration Error
1 14
2 NaN
Trial 2 was precluded by other users of the shared system complaining!
The idea was to cause more rapid context switches. Later, I might try
this again with say 16 workers. If anyone has a better idea, please
reply.
EOM
Regards,
On Tue, Aug 6, 2019 at 12:43 AM Bystricky, Juro
<juro.bystri...@intel.com <mailto:juro.bystri...@intel.com>> wrote:
I can reproduce the problem fairly easily (and, sadly even with the
latest commits as 060058bb29f70b244e685b3c704eb0641b736f73 ).
In my case, it seems easy to reproduce if I have 40+ threads running.
The reproducer script (below) fails typically within the first 10
iterations.
#!/bin/bash
fname='glibc-locale_master_august8'
max=1000
for (( i=1; i <= $max; i++ ))
do
echo "$i/$max ${fname}_$i.log"
bitbake glibc-locale -c cleanall 2>&1 > /dev/null
bitbake glibc-locale 2>&1 > ${fname}_$i.log
if grep -q "host-user-contaminated" ${fname}_$i.log; then
echo "error !"
exit 2
#else
#rm ${fname}_$i.log
fi
done
________________________________________
From: openembedded-core-boun...@lists.openembedded.org
<mailto:openembedded-core-boun...@lists.openembedded.org>
[openembedded-core-boun...@lists.openembedded.org
<mailto:openembedded-core-boun...@lists.openembedded.org>] on behalf
of Seebs [se...@seebs.net <mailto:se...@seebs.net>]
Sent: Saturday, August 03, 2019 7:23 AM
To: Khem Raj
Cc: openembedded-core@lists.openembedded.org
<mailto:openembedded-core@lists.openembedded.org>
Subject: Re: [OE-core] [PATCH v2] pseudo: Upgrade to latest to fix
openat() with a directory symlink [NAK]
On Sat, 3 Aug 2019 05:33:46 -0700
Khem Raj <raj.k...@gmail.com <mailto:raj.k...@gmail.com>> wrote:
> Will this fix the file ownership issue that we see with Glibc-locale
> packages from time to time?
I have no idea. Since I haven't got a reliable reproducer for it, I
can't test it in a sane way.
-s
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# Randy MacLeod
# Wind River Linux
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