Re: [PATCH v2] posix-aio-compat: fix latency issues

2011-08-23 Thread Stefan Hajnoczi
On Mon, Aug 22, 2011 at 6:29 PM, Jan Kiszka wrote: > On 2011-08-14 06:04, Avi Kivity wrote: >> In certain circumstances, posix-aio-compat can incur a lot of latency: >>  - threads are created by vcpu threads, so if vcpu affinity is set, >>    aio threads inherit vcpu affinity.  This can cause many

Re: [PATCH v2] posix-aio-compat: fix latency issues

2011-08-22 Thread Jan Kiszka
On 2011-08-14 06:04, Avi Kivity wrote: > In certain circumstances, posix-aio-compat can incur a lot of latency: > - threads are created by vcpu threads, so if vcpu affinity is set, >aio threads inherit vcpu affinity. This can cause many aio threads >to compete for one cpu. > - we can cre

Re: [PATCH v2] posix-aio-compat: fix latency issues

2011-08-22 Thread Kevin Wolf
Am 14.08.2011 06:04, schrieb Avi Kivity: > In certain circumstances, posix-aio-compat can incur a lot of latency: > - threads are created by vcpu threads, so if vcpu affinity is set, >aio threads inherit vcpu affinity. This can cause many aio threads >to compete for one cpu. > - we can c