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Re: [Qemu-devel] [PATCH v4 0/7] aio: Support epoll by introducing qemu_p
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v4 0/7] aio: Support epoll by introducing qemu_poll abstraction |
Date: |
Wed, 29 Apr 2015 11:06:17 +0100 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Wed, Apr 29, 2015 at 11:24:24AM +0800, Fam Zheng wrote:
> v4: Rebase to 2.3 and rerun tests. timerfd+epoll shows clear improvement over
> current master when the virtio-console device attaches more fds to the
> main
> loop:
>
> syscall high # of fd low # of fd
> -------------------------------------------------
> qemu.git(ppoll) 24 83
> ppoll+epoll 49 82
> timerfd+epoll 49 91
> glib 20 82
>
> (In high # of fd case, 3 activated but idle virtio-console devices are
> attached, which will add us hundereds of fds to poll)
Thanks for posting these numbers. Nice job on speeding up the Linux
case, I'm looking forward to seeing the results with your new epoll
syscall patches.
It looks like there will be a 15-20% regression for non-Linux hosts with
high # of fds. But since the low # of fd regression between
qemu.git(ppoll) and glib is small, I think we can merge this now and
optimize later, if necessary.
Reviewed-by: Stefan Hajnoczi <address@hidden>
pgp60ih7TeWH6.pgp
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- [Qemu-devel] [PATCH v4 0/7] aio: Support epoll by introducing qemu_poll abstraction, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 1/7] poll: Introduce QEMU Poll API, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 2/7] posix-aio: Use QEMU poll interface, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 3/7] poll: Add epoll implementation for qemu_poll, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 4/7] main-loop: Replace qemu_poll_ns with qemu_poll, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 7/7] poll-linux: Add timerfd support, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 5/7] tests: Add test case for qemu_poll, Fam Zheng, 2015/04/28
- [Qemu-devel] [PATCH v4 6/7] poll-glib: Support ppoll, Fam Zheng, 2015/04/28
- Re: [Qemu-devel] [PATCH v4 0/7] aio: Support epoll by introducing qemu_poll abstraction,
Stefan Hajnoczi <=
- Re: [Qemu-devel] [PATCH v4 0/7] aio: Support epoll by introducing qemu_poll abstraction, Kevin Wolf, 2015/04/30