From: Shane <shane@zeke.yi.org>
To: linux-kernel@vger.kernel.org
Cc: lkml-frank@unternet.org
Subject: Re: severe slowdown with 2.4 series w/heavy disk access (revisited)
Date: 19 Apr 2002 19:07:29 -0400 [thread overview]
Message-ID: <1019257649.17679.45.camel@mars.goatskin.org> (raw)
Hi Frank,
>Hi'all,
>Anyone remember this thread:
> "severe slowdown with 2.4 series w/heavy disk access"
>http://hypermail.spyroid.com/linux-kernel/archived/2001/week52/0266.html
>It describes the tendency of 2.4 series kernels to slowdown under I/O
>load.
[..snip..]
I tried copying a 650MB file to the same file system on an IDE disk
and...
(This is while the copy is running)
$ time ls -l
total 1284548
-rw-r--r-- 1 shane shane 685183312 Apr 19 18:13 650MB_tar_ball
-rw-r--r-- 1 shane shane 628895744 Apr 19 18:44 X
0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (191major+35minor)pagefaults 0swaps
$ time ls -l
total 1287624
-rw-r--r-- 1 shane shane 685183312 Apr 19 18:13 650MB_tar_ball
-rw-r--r-- 1 shane shane 632041472 Apr 19 18:44 X
0.01user 0.00system 0:00.00elapsed 500%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (191major+35minor)pagefaults 0swaps
$ time ls -l
total 1290188
-rw-r--r-- 1 shane shane 685183312 Apr 19 18:13 650MB_tar_ball
-rw-r--r-- 1 shane shane 634662912 Apr 19 18:44 X
0.01user 0.00system 0:00.00elapsed 500%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (191major+35minor)pagefaults 0swaps
vmstat 1 was running as well
procs memory swap io system cpu
r w b swpd free buf cache si so bi bo in cs us sy id
0 0 0 53580 12296 3008 258120 0 0 0 0 180 87 0 0 100
1 0 0 53580 12296 3008 258120 0 0 0 0 176 67 0 0 100
3 0 0 53580 120492 3008 149836 0 0 2316 0 240 232 1 13 86
2 0 0 53580 59432 3008 210596 0 0 30208 0 852 1491 3 42 55
0 1 0 53580 4740 3012 264864 0 0 30212 0 652 1107 1 39 60
0 1 1 53580 4600 3012 264696 0 0 23048 5760 586 885 2 31 67
1 1 2 53580 4492 3016 264784 0 0 2560 17540 504 207 0 7 93
0 1 1 53580 4324 3016 264944 0 0 2560 18304 501 256 0 6 94
0 1 1 53580 4284 3016 264968 0 0 2048 16128 509 244 0 6 94
0 1 1 53580 4488 3016 264740 0 0 2048 18020 499 206 0 5 95
1 0 0 53604 4216 3028 266368 0 0 9732 10192 539 438 0 18 82
0 1 1 53604 4424 3028 266056 0 0 6144 18148 525 395 2 6 92
1 0 0 53604 3924 2904 266860 0 6019968 3900 614 866 0 35 65
1 0 0 53604 4668 2908 265728 0 0 29188 0 634 1077 0 39 61
...
This is on a UP AMD Tbird, 384MB, on an IDE disk on a Promise TX133
controller. The Gnome desktop was responsive throughout the copy.
This is with the 2.4.19-pre6aa1 kernel. Give it a try...if you want.
Regards,
Shane
next reply other threads:[~2002-04-19 23:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-19 23:07 Shane [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-04-19 18:04 Frank de Lange
2002-04-19 17:35 Frank de Lange
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