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[Qemu-devel] postcopy test under load
From: |
Dr. David Alan Gilbert |
Subject: |
[Qemu-devel] postcopy test under load |
Date: |
Wed, 22 Nov 2017 10:59:58 +0000 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
Hi Peter,
I was trying to reproduce the occasional travis postcopy
test case failures you were seeing; I can reproduce them but
only with tcg - which makes me wonder if the problem is in
the test or actually in tcg.
My test is:
export QTEST_QEMU_BINARY=wherever/try/x86_64-softmmu/qemu-system-x86_64
cd whereever/try
for NUM in $(seq 1 100)
do
echo 'while true; do ./tests/migration-test || break; done' | taskset 2 bash &
done
so all of the instances are pinned to one core using taskset.
I had 100 instances of kvm running overnight (x86-64) and didn't
hit any problems.
30 instances of tcg hit the problem in 5 minutes (x86-64 on x86-64).
Dave
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
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