Re: 2.4.1pre8 slowdown on dbench tests

Szabolcs Szakacsits (szaka@f-secure.com)
Thu, 18 Jan 2001 22:18:38 +0200 (MET DST)


On Thu, 18 Jan 2001, Marcelo Tosatti wrote:

> On my dbench runs I've noted a slowdown between pre4 and pre8 with 48
> threads. (128MB, 2 CPU's machine)

Below some kernel compile numbers on a 32 MB RAM + 32 MB swap box. The
three lines mean compilation with the -j1, -j2 and -j4 option. Most of
the time 2.4.1pre8 was also unable to compile the kernel because cc1
was killed by OOM handler.

Szaka

2.2.18
548.27user 94.18system 10:50 98%CPU (450479major+696869minor)
548.94user 153.85system 11:51 98%CPU (487111major+704948minor)
599.44user 2018.66system 51:47 84%CPU (2295045major+1182819minor)
=========
2.4.0
557.18user 121.57system 11:25 99%CPU (442434major+705429minor)
551.76user 158.78system 12:11 97%CPU (446183major+711572minor)
579.65user 2860.53system 1:05:45 87%CPU (650964major+1209969minor)
===========
2.4.0+blk-13B
546.89user 140.35system 11:33 99%CPU (442435major+705424minor)
570.73user 188.51system 12:56 97%CPU (445171major+712791minor)
566.33user 2681.20system 1:02:26 86%CPU (654402major+1225784minor)
=================
2.4.1pre8
546.23user 118.81system 11:09 99%CPU (442434major+705424minor)
569.12user 161.25system 12:22 98%CPU (446667major+712457minor)
727.58user 2489.96system 1:25:34 62%CPU (616240major+1375321minor)

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