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SubjectRe: slow down in 2.6 vs 2.4
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On Tuesday, June 8, 2004, at 08:35 PM, Phy Prabab wrote:

> Hello!
>
> Over the last two days I have been struggling with
> understanding why 2.6.x kernel is slower than
> 2.4.21/23 kernels. I think I have a test case which
> demostrates this issue.
>

Phy, you and I have corresponded off list. I think we are experiencing
the same thing...

>
> 2.4.21:
> 323.68user 56.07system 6:35.77elapsed 95%CPU
> (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (3138783major+3818347minor)pagefaults
> 0swaps

Is there any way to get similar numbers system wide on 2.4? This exists
for 2.6.x, and the latest sysstat shows it with sar -B, but as the sar
manpage states, the fault/s numbers are not available on 2.4. :(

Stats for a recent period:

Linux 2.4.23 (xxx) 06/09/2004

11:40:00 AM pgpgin/s pgpgout/s fault/s majflt/s
11:50:00 AM 17.52 72.34 0.00 0.00
12:00:00 PM 20.93 65.06 0.00 0.00
Average: 19.22 68.70 0.00 0.00

Linux 2.6.6 (yyy) 06/09/04

11:40:00 pgpgin/s pgpgout/s fault/s majflt/s
11:50:00 70.68 81.13 13756.37 0.02
12:00:00 89.22 81.82 11598.21 0.03
Average: 79.95 81.48 12676.43 0.03


Thats from two different boxes.. see my earlier message this week for
an explanation of the setup.

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