Actions
Bug #5395
closedarm: osd: big performance differential between read/write
% Done:
0%
Source:
Support
Tags:
Backport:
Regression:
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
-- arm --
Raw /dev/rbd device
$ sudo dd if=/dev/zero of=/dev/rbd1 bs=4M count=128 conv=fdatasync
128+0 records in
128+0 records out
536870912 bytes (537 MB) copied, 2.37645 s, 226 MB/s
$ sudo dd if=/dev/rbd1 of=/dev/null bs=4M count=128
128+0 records in
128+0 records out
536870912 bytes (537 MB) copied, 33.2722 s, 16.1 MB/s
-- x86 --
- dd if=/dev/zero of=/dev/rbd1 bs=4M count=128 conv=fdatasync
128+0 records in
128+0 records out
536870912 bytes (537 MB) copied, 1.88273 s, 285 MB/s
- dd of=/dev/null if=/dev/rbd1 bs=4M count=128
128+0 records in
128+0 records out
536870912 bytes (537 MB) copied, 3.76684 s, 143 MB/s
Actions