Re: Help understanding slow down

[Phy Prabab]

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@xxxxxxxxx> 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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