nmi_watchdog killing tickless feature

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

 



Hi

Please CC me on reply, i am not subscribed to list.

I did small test, and notice that if nmi_watchdog is enabled
mpstat 1

06:11:00     CPU   %user   %nice    %sys %iowait    %irq   %soft  %steal  
%idle    intr/s
06:11:01     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00    993.07
06:11:02     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00   1007.00
06:11:03     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00   1005.00

if disabled
06:13:52     CPU   %user   %nice    %sys %iowait    %irq   %soft  %steal  
%idle    intr/s
06:13:53     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00      1.00
06:13:54     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00      9.00
06:13:55     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00      4.00
06:13:56     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00      2.00
06:13:57     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00 
100.00      2.00

The difference is huge, probably in power consumption too. Kernel is
relatively standard (2.6.24-rc6-git1), if required i can attach .config
If it is not bug, probably good to document, that it is killing powersaving
features?

--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

--
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]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux