Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2015/08/08 11:08:44
Centos 6.7 has rebased irqbalance to 1.0.7, so that particular issue should be solved. However you should check if that solves your problem as well...
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Degraded IO performance on kernel 2.6.32-504.3.3
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Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2015/08/08 16:25:09
I'll try
Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2015/08/12 10:51:30
The performance are still degraded but there is a change with this kernel.
After a fresh boot the performance are really similar to the performance of 2.6.32-431.29.2 but the next day they become worse and slow like the 2.6.32-504.3.3.
This did not happen with 504 (I've made many tests and rebooted many times), and doesn't happen with the 403 (the performance are always good)
After a fresh boot the performance are really similar to the performance of 2.6.32-431.29.2 but the next day they become worse and slow like the 2.6.32-504.3.3.
This did not happen with 504 (I've made many tests and rebooted many times), and doesn't happen with the 403 (the performance are always good)
Code: Select all
[kirys@dax ~]$ lsb_release -a && uname --all
LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.7 (Final)
Release: 6.7
Codename: Final
Linux dax.network 2.6.32-573.1.1.el6.x86_64 #1 SMP Sat Jul 25 17:05:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2015/08/24 17:02:50
Checked latest kernel the behaviour is the one described recently, good performance on fresh boot, bad performance the day after....
Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2016/01/07 18:31:48
Performance degradation is still here with latest kernel 
Re: Degraded IO performance on kernel 2.6.32-504.3.3
Posted: 2016/05/06 20:00:52
I have written one nvme rdma driver.Initially it was a bio based driver.Now I change it to request based. I have not seen any performance drop in centos 7 but I experienced a huge performance degradation( specially read performance) in centos 6.6. I tried disabling irqbalanced but did not help much. Could anyone tell me what should I do here.