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SubjectRe: A very bad report re 2.2.0preX
On Wed, 13 Jan 1999, Andrea Arcangeli wrote:

# You could try my 2.2.0-pre7-arca-VM-19 and 2.2.0-pre7-arca-VM-18 at:

Very nice!

* I can't seem to force the kernel the swap out any process by just doing
filesystem level ops ala
find / -xdev -exec cat {} > /dev/null \;
or any other stuff like that. It certainly no longer swaps out your
shell on a ls -lR.
* The responsiveness lost a few versions ago is back. I don't know how to
measure it, but its clearly noticable.

* Dunno when it happened, but I can put all my HD's into DMA mode with

hdparm -c1 -d1 -m8 -u1 /dev/hda
hdparm -c1 -d1 -m8 -u1 /dev/hdb
hdparm -c1 -d1 -m8 -u1 /dev/hdc

and they work. Previously, only /dev/hda could use -d1 safely. I also
notice that the numbers from hdparm -tT and bonnie are approximately the
same for the first time in my knowledge.

/dev/hda4: (this is my root partition, so it probably had various activity
while bonnie was running)

Timing buffer-cache reads: 128 MB in 1.84 seconds =69.57 MB/sec
Timing buffered disk reads: 64 MB in 6.75 seconds = 9.48 MB/sec

-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
384 2293 59.6 5229 13.2 2525 12.2 3420 82.7 7980 13.4 90.3 1.7
/dev/hdc3:

Timing buffer-cache reads: 128 MB in 1.82 seconds =70.33 MB/sec
Timing buffered disk reads: 64 MB in 6.54 seconds = 9.79 MB/sec

Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
384 2356 61.2 5449 13.8 2672 13.5 3443 83.4 9237 16.0 103.1 2.3
/dev/hdb3:

Timing buffer-cache reads: 128 MB in 1.80 seconds =71.11 MB/sec
Timing buffered disk reads: 64 MB in 5.32 seconds =12.03 MB/sec

-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
384 3222 83.8 11022 28.8 3996 19.7 3913 95.4 11133 19.8 95.2 2.0
#
# ftp://e-mind.com/pub/linux/kernel-patches/
#
# Andrea Arcangeli
#

http://neko.binary9.net/scripts/sysinfo


G'day!
-- n i c h o l a s j l e o n
elegance through simplicity*http://mrnick.binary9.net*nicholas@binary9.net
good fortune through truth*roaming:njllm@email.msn.com*ICQ#2170994*U+($++)
TRA#6805*not all questions have answers*pseudogeek:P+++($++)L+($++)W=lm@b9
trust no-one with an iq under 150*understand yourself before trying others


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