lkml.org 
[lkml]   [2006]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectCSCAN vs CFQ I/O scheduler benchmark results
Hello

I ran the sysbench benchmark to compare the CSCAN I/O scheduler
against the CFQ scheduler and following are the results. The results
are interesting especially in case of sequential writes and the random
workloads

Latency (seconds)

seq seq seq rnd
rnd rnd
reads writes r + w reads
writes r + w
--------------------------------------------------------------------------------------
CFQ 0.0116 0.0164 0.0107 0.1178 0.0423 0.0605

CSCAN 0.0148 0.0092 0.0169 0.1043 0.0473 0.0732


Throughput (MB/seconds)

seq seq seq rnd
rnd rnd
reads writes r + w reads
writes r + w

--------------------------------------------------------------------------------------
CFQ 19.062 15.251 22.127 2.1197 1.0032 1.376

CSCAN 14.553 22.108 14.72 2.394 0.9304 1.399


The machine configuation is as follows
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz
Memory: 1027500 KB (1 GB)
Filesystem: ext3
Kernel: 2.6.16.2

If interseted you may have a look at the raw data at
http://www.google.com/notebook/public/14554179817860061151/BDQtXSwoQ2_mdxLgh

- Vishal
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-06-09 21:32    [W:0.109 / U:5.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site