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Re: [Qemu-devel] [PATCH v2 for 4.1 0/2] avoid lseek on block_status
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From: |
Kevin Wolf |
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Subject: |
Re: [Qemu-devel] [PATCH v2 for 4.1 0/2] avoid lseek on block_status |
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Date: |
Wed, 22 May 2019 12:47:53 +0200 |
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User-agent: |
Mutt/1.11.3 (2019-02-01) |
Am 08.04.2019 um 18:26 hat Vladimir Sementsov-Ogievskiy geschrieben:
> Hi!
>
> It's a continuation for
> "[PATCH] qcow2: avoid lseek on block_status if possible"
> https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg06598.html
>
> performance results for block-status on tmpfs [tests originally by Kevin,
> now they are in 01]:
>
> ./tests/perf/block/qcow2/convert-blockstatus /ramdisk/x
>
> after 01:
>
> plain: 81.77
> forward: 82.61
> prealloc: 0.01
>
> after 02:
>
> plain: 0.12
> forward: 0.12
> prealloc: 0.01
Thanks, applied to the block branch.
Kevin