Multi-threaded IO performance regression on 2.6 kernel?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



All,

I am testing the multi-threaded IO performance on Opteron servers. 

I use dd as the test tools. The single dd can reach 60MBps for single disk.

on 2.6.5 kernel, If dd numbers exceed the CPU numbers, vmstat bi reduced to 20MBps.

on 2.4.21 kernel, multi-threaded IO performance works fine, even I run 40 dd command at same time.

Does anybody experienced similar issue also?

Best Regards
Bill Xie

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

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]
  Powered by Linux