Ubuntu
linux-keystone package

  1. Bug #1386326
  2. Comment #3

Comment 3 for bug 1386326

Revision history for this message
Ike Panhc (ikepanhc) wrote :

With most of ftrace enabled, bonnie++ shows we have SSD I/O performance regression.
Sequential read speed from 131K/Sec down to 102K/Sec

--
Kernel version, 3.13.0-17.27 with ftrace enable

ubuntu@ubuntu:~$ bonnie++ -f -n 0
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...done...done...
Version 1.97 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ubuntu 13G 102888 81 63130 55 244493 85 8985 374
Latency 759ms 662ms 5933us 7319us

1.97,1.97,ubuntu,1,1415025240,13G,,,,102888,81,63130,55,,,244493,85,8985,374,,,,,,,,,,,,,,,,,,,759ms,662ms,,5933us,7319us,,,,,,

--
Kernel version, 3.13.0-17.27

ubuntu@ubuntu:~$ bonnie++ -f -n 0
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...done...done...
Version 1.97 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ubuntu 13G 131511 97 74773 64 247270 84 8543 373
Latency 103ms 102ms 6456us 7237us