From: Nicholas Lee <emptysands@gmail.com>
To: xen-devel@lists.xensource.com
Subject: Large IO Waits for srm.
Date: Sun, 10 Apr 2005 19:07:35 +1200 [thread overview]
Message-ID: <2b6116b30504100007353bd079@mail.gmail.com> (raw)
I've got four VMs running including dom0, on U320 SCSI md-raid1.
In domO I'm srm (secure delete) a couple 600Mb+ files. The other domUs are idle.
Xen 2.0.6-testing/2.6.11.6
nic@sea:/backup$ vmstat 3
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
3 1 4 1976 32 97020 0 0 193 1811 341 512 0 6 23 71
0 1 4 2136 32 96836 0 0 3 2507 440 650 0 1 0 99
0 1 4 2104 32 96872 0 0 0 2571 431 664 0 0 0 100
0 1 4 2104 32 96868 0 0 0 2561 432 668 0 0 0 100
0 1 4 2200 32 96792 0 0 37 2379 419 656 0 0 0 100
...
nic@sea:/backup$ w
17:26:16 up 4:21, 1 user, load average: 1.00, 1.00, 0.92
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
nic pts/1 base-one.kiwa.co 17:22 0.00s 0.01s 0.00s w
The large IO wait level seems more than it should be. Here is an IDE
based non Xen system doing the same.
nic@lode:/home/bak$ vmstat 3
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 1 41984 57352 5856 352988 0 0 3 4 1 2 1 0 98 1
1 1 41984 56264 5880 353000 0 0 1 24937 2584 5174 1 29 0 69
1 0 41984 56264 5880 353020 0 0 0 6161 1417 1073 0 81 0 18
1 0 41984 56208 5896 353052 0 0 11 1279 1106 462 0 97 0 3
1 0 41984 56216 5904 353056 0 0 0 1256 1104 457 0 97 0 3
1 0 41984 56216 5904 353068 0 0 0 1282 1120 457 0 97 0 3
Nicholas
next reply other threads:[~2005-04-10 7:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-10 7:07 Nicholas Lee [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-04-10 18:01 Large IO Waits for srm Ian Pratt
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