| Commit message (Collapse) | Author | Age | Files | Lines |
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Let's keep view part in separate: this way it's better to improve it in
the following commits.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20201021145859.11201-18-vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
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Next patch will use utf8 plus-minus symbol, let's use more generic (and
more readable) name.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20201021145859.11201-17-vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
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The script 'bench_write_req.py' allows comparing performances of write
request for two qemu-img binary files.
An example with (qemu-img binary 1) and without (qemu-img binary 2) the
applied patch "qcow2: skip writing zero buffers to empty COW areas"
(git commit ID: c8bb23cbdbe32f5) has the following results:
SSD:
---------------- ------------------- -------------------
<qemu-img binary 1> <qemu-img binary 2>
<cluster front> 0.10 +- 0.00 8.16 +- 0.65
<cluster middle> 0.10 +- 0.00 7.37 +- 1.10
<cross cluster> 7.40 +- 1.08 21.97 +- 4.19
<cluster 64K> 2.14 +- 0.94 8.48 +- 1.66
---------------- ------------------- -------------------
HDD:
---------------- ------------------- -------------------
<qemu-img binary 1> <qemu-img binary 2>
<cluster front> 2.30 +- 0.01 6.19 +- 0.06
<cluster middle> 2.20 +- 0.09 6.20 +- 0.06
<cross cluster> 8.32 +- 0.16 8.26 +- 0.14
<cluster 64K> 8.20 +- 0.05 6.26 +- 0.10
---------------- ------------------- -------------------
Suggested-by: Denis V. Lunev <den@openvz.org>
Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <1594741846-475697-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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