Re: Help understanding slow down

Phy Prabab
2004-05-24T00:57:55Z

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Just for more clarification, here is a perfect
example:

2.6.7-p1:
24.86user 51.77system 2:58.87elapsed 42%CPU
(0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (13major+7591686minor)pagefaults
0swaps

2.4.21:
28.68user 34.98system 1:12.34elapsed 87%CPU
(0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (5691267major+1130523minor)pagefaults
0swaps

Both runs on the same machine with the same process
(making headers).

Could someone give me some pointers/directions on
where to look.

Thank you for your time.
Phy

--- Phy Prabab <phyprabab@yahoo.com> wrote:
> Hello,
>
> I need some help understanding what is at issue with
> the extreme lsow down in build times for a custom
> executable on different kernel versions. The
> difference is pretty huge:
>
> RH 2.4.20-13-7 : ~1m.10s
> 2.4.22 : ~1m.40s
> 2.4.26 : ~2m.15s
> 2.6.1 : ~3m.40s
> 2.6.2 : ~4m.00s
> 2.6.3 : ~4m.00s
> 2.6.6 : ~3m.15s
> 2.6.6-mm4 : ~2m.10s
> 2.6.6-mm5 : ~2m.50s
> 2.6.7-p1 : ~2m.80s
> (ran five times on every kernel to get approximate
> time listed)
>
> The question is, how can I get the newer kernels to
> scream like the older kernels?
>
> I have moved all files in question to the local disk
> to rule out network issues (though the 2.6.x kernels
> are faster at net access). I have run the make
> command in debug mode and find no differnce betHz
> w/8G
> RAM.
>
> Thank you for your assistance.
> Phy
>
>
>
>
>
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