[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations |
Date: |
Wed, 13 Apr 2011 22:16:16 +0200 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Mon, Apr 11, 2011 at 10:27:41PM +0200, Jan Kiszka wrote:
> These patches were posted before. They bring down the overhead of the
> io-thread mode for TCG here, specifically when emulating SMP.
>
> The major change in this version, besides rebasing, is the exclusion of
> KVM from the main loop polling optimization.
>
>
>
> Jan Kiszka (3):
> Do not drop global mutex for polled main loop runs
> Poll main loop after I/O events were received
> Do not kick vcpus in TCG mode
>
> cpus.c | 2 +-
> sysemu.h | 2 +-
> vl.c | 22 ++++++++++++++++------
> 3 files changed, 18 insertions(+), 8 deletions(-)
>
Thanks for working on improving the io-thread with TCG. Your patches
make sense, but they don't seems to fix the slowdown observed when
enabling the io-thread. Well maybe they were not supposed to. This is
for example the results of netperf between guest and host using virtio:
no io-thread 122 MB/s
io-thread 97 MB/s
io-thread + patches 98 MB/s
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net
- [Qemu-devel] [PATCH v2 0/3] io-thread optimizations, Jan Kiszka, 2011/04/11
- [Qemu-devel] [PATCH v2 3/3] Do not kick vcpus in TCG mode, Jan Kiszka, 2011/04/11
- [Qemu-devel] [PATCH v2 2/3] Poll main loop after I/O events were received, Jan Kiszka, 2011/04/11
- [Qemu-devel] [PATCH v2 1/3] Do not drop global mutex for polled main loop runs, Jan Kiszka, 2011/04/11
- Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations, Paolo Bonzini, 2011/04/12
- Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations,
Aurelien Jarno <=
- Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations, Aurelien Jarno, 2011/04/25
- Re: [Qemu-devel] [PATCH v2 0/3] io-thread optimizations, Jan Kiszka, 2011/04/26