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| author | Yury Kotov <yury-kotov@yandex-team.ru> | 2019-09-09 16:13:34 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-09-16 17:13:07 +0200 |
| commit | bd1f7ff4b27444740786274c41caf3e9b9c35bba (patch) | |
| tree | 691a6d3cb12041fe2185f5d1e00e6e2c555aea98 /docs/devel/secure-coding-practices.rst | |
| parent | 3dcc9c6ec4ea60fd1464b35aa82199483f24ba75 (diff) | |
| download | focaccia-qemu-bd1f7ff4b27444740786274c41caf3e9b9c35bba.tar.gz focaccia-qemu-bd1f7ff4b27444740786274c41caf3e9b9c35bba.zip | |
cpus: Fix throttling during vm_stop
Throttling thread sleeps in VCPU thread. For high throttle percentage this sleep is more than 10ms. E.g. for 60% - 15ms, for 99% - 990ms. vm_stop() kicks all VCPUs and waits for them. It's called at the end of migration and because of the long sleep the migration downtime might be more than 100ms even for downtime-limit 1ms. Use qemu_cond_timedwait for high percentage to wake up during vm_stop. Signed-off-by: Yury Kotov <yury-kotov@yandex-team.ru> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20190909131335.16848-3-yury-kotov@yandex-team.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'docs/devel/secure-coding-practices.rst')
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