Though I'm not ubutu user, but I do have the same problem while
upgrading vanilla kernel from 2.6.17.4 to 2.6.22.15. Therefore it should
not be the ubutu specific problem. Here is bonnie++ test result on old
and new kernel respectively. The disk throughput is improved 10% but
CPU utilization shoot up to 95% from 34%, for the same amount of I/O.
Could someone help to point to any patches, or fixes on this issue?
## ###############Linux 2.6.17 #1 SMP Tue May 6
##################################
Version 1.03c ------Sequential Output------ --Sequential Input- --Random-
-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
ib-10-34-68-2 2016M 23989 35 44123 6 16360 1 21823 28 43090 1 172.7 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
ib-10-34-68-2.infoblox.com,2016M,23989,35,44123,6,16360,1,21823,28,43090,1,172.7,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
## ###############Linux 2.6.22.15 #1 SMP Tue May 6
##################################
bonnie++ -d /storage -s 2016M -u root
-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
ib-10-34-68-2 2016M 26078 94 52117 17 23596 5 27172 86 56402 4 160.2 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
ib-10-34-68-2.infoblox.com,2016M,26078,94,52117,17,23596,5,27172,86,56402,4,160.2,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
###################################################################################
--
Heavy Disk I/O harms desktop responsiveness
https://bugs.launchpad.net/bugs/131094
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
