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| author | Bob Liu <bob.liu@oracle.com> | 2015-11-14 11:12:19 +0800 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2016-01-04 12:21:06 -0500 |
| commit | d4bf0065b7251afb723a29b2fd58f7c38f8ce297 (patch) | |
| tree | 89b6ecb159f7dccd22ac1511388b589d3b424837 /mm/oom_kill.c | |
| parent | d62d86000316d7ef38e1c2e9602c3ce6d1cb57bd (diff) | |
| download | linux-d4bf0065b7251afb723a29b2fd58f7c38f8ce297.tar.bz2 | |
xen/blkback: make pool of persistent grants and free pages per-queue
Make pool of persistent grants and free pages per-queue/ring instead of
per-device to get better scalability.
Test was done based on null_blk driver:
dom0: v4.2-rc8 16vcpus 10GB "modprobe null_blk"
domu: v4.2-rc8 16vcpus 10GB
[test]
rw=read
direct=1
ioengine=libaio
bs=4k
time_based
runtime=30
filename=/dev/xvdb
numjobs=16
iodepth=64
iodepth_batch=64
iodepth_batch_complete=64
group_reporting
Results:
iops1: After patch "xen/blkfront: make persistent grants per-queue".
iops2: After this patch.
Queues: 1 4 8 16
Iops orig(k): 810 1064 780 700
Iops1(k): 810 1230(~20%) 1024(~20%) 850(~20%)
Iops2(k): 810 1410(~35%) 1354(~75%) 1440(~100%)
With 4 queues after this commit we can get ~75% increase in IOPS, and
performance won't drop if increasing queue numbers.
Please find the respective chart in this link:
https://www.dropbox.com/s/agrcy2pbzbsvmwv/iops.png?dl=0
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'mm/oom_kill.c')
0 files changed, 0 insertions, 0 deletions