lkml.org 
[lkml]   [2014]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/1] libata: Get rid of ata_port::qc_allocated bitmask
Date
Hi Tejun,

This update is against "scsi-mq" branch in Nicholas tree:
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git

A quick check with 'fio' tool's random reading indicates an
moderate improvement on a single drive, four threads and the
queue depth of 32:

read : io=131072KB, bw=149785B/s, iops=36, runt=896066msec

vs

read : io=131072KB, bw=166884B/s, iops=40, runt=804257msec

I have not measured cache line bouncing itself. I am kind of
limited in hardware configurations, but let me know if you
want to see more testing anyway.

Thanks!

Alexander Gordeev (1):
libata: Get rid of ata_port::qc_allocated bitmask

drivers/ata/libata-core.c | 82 +++++++++++++++++++++++++++++++-------------
include/linux/libata.h | 6 ++-
2 files changed, 62 insertions(+), 26 deletions(-)

--
1.7.7.6



\
 
 \ /
  Last update: 2014-01-21 16:42    [W:0.074 / U:1.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site