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Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line
From: |
Pranith Kumar |
Subject: |
Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line |
Date: |
Tue, 25 Oct 2016 16:35:48 -0400 |
On Tue, Oct 25, 2016 at 4:02 PM, Paolo Bonzini <address@hidden> wrote:
>
>
>> I've written a patch (see below) to take the per-bucket sequence locks.
>
> What's the performance like?
>
Applying only this patch, the perf numbers are similar to the 128
cache line alignment you suggested.
0 4
10 9.70
20 8.09
30 7.13
40 6.49
I am not sure why only 100% reader case is so low. Applying the
sequence lock cache alignment patch brings it back up to 13
MT/s/thread.
--
Pranith
- [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Pranith Kumar, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Paolo Bonzini, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Pranith Kumar, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Paolo Bonzini, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Pranith Kumar, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Paolo Bonzini, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line,
Pranith Kumar <=
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Emilio G. Cota, 2016/10/25
- Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Paolo Bonzini, 2016/10/25
Re: [Qemu-devel] [RFC PATCH] qht: Align sequence lock to cache line, Emilio G. Cota, 2016/10/25