lkml.org 
[lkml]   [2002]   [Dec]   [7]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
FromCon Kolivas <>
Subject[BENCHMARK] max bomb segment tuning with read latency 2 patch in contest
DateSat, 7 Dec 2002 16:20:01 +1100
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Here are some io_load contest benchmarks with 2.4.20 with the read latency2 
patch applied and varying the max bomb segments from 1-6 (SMP used to save 
time!)

io_load:
Kernel [runs]           Time    CPU%    Loads   LCPU%   Ratio
2.4.20 [5]              164.9   45      31      21      4.55
2420rl2b1 [5]           93.5    81      18      22      2.58
2420rl2b2 [5]           88.2    87      16      22      2.44
2420rl2b4 [5]           87.8    84      17      22      2.42
2420rl2b6 [5]           100.3   77      19      22      2.77

io_other:
Kernel [runs]           Time    CPU%    Loads   LCPU%   Ratio
2.4.20 [5]              89.6    86      17      21      2.47
2420rl2b1 [3]           48.1    156     9       21      1.33
2420rl2b2 [3]           50.0    149     9       21      1.38
2420rl2b4 [5]           51.9    141     10      21      1.43
2420rl2b6 [5]           52.1    142     9       20      1.44

There seems to be a limit to the benefit of decreasing max bomb segments. It 
does not seem to have a significant effect on io load on another hard disk 
(although read latency2 is overall much better than vanilla).

Con
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.0 (GNU/Linux)
iD8DBQE98YUEF6dfvkL3i1gRAn4kAJ4x414sM3G+8fVrXv2P0huRhNKicgCgqFyo
kCXIKMVtO/Zp+tM92qlUz4s=
=HOKs
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 12:31    [from the cache]
©2003-2008