From: fche@redhat.com (Frank Ch. Eigler)
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: systemtap@sources.redhat.com
Subject: Re: simple (dumb) script to track sizes of IOs
Date: Thu, 06 Oct 2005 17:27:00 -0000 [thread overview]
Message-ID: <y0m8xx6a74o.fsf@tooth.toronto.redhat.com> (raw)
In-Reply-To: <1128617293.4754.101.camel@dyn9047017102.beaverton.ibm.com>
pbadari wrote:
> Here is a simple systemtap script to track the sizes of IOs
> that are getting generated (to the driver).
That's block i/o only right?
> [...]
> Is there a way, I can print in the order of IO sizes easily ?
There will be a way of iterating in a sorted order, probably
expressed syntactically like this:
# function report () {
# foreach (ascending(io) in iosizes) {
# if (iosizes[io]) # ...
# }
> [...]# stap -g iosizes.stp [...]
Your script does not need guru mode. Merely reading $rq->nr_sectors
is fine without that. You also don't need to check "if (iosizes[io])"
since zero-valued array elements do not appear in foreach()
iterations.
- FChE
next prev parent reply other threads:[~2005-10-06 17:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-06 16:48 Badari Pulavarty
2005-10-06 17:27 ` Frank Ch. Eigler [this message]
2005-10-06 17:37 ` Badari Pulavarty
2005-10-06 17:44 ` Frank Ch. Eigler
2005-10-07 19:17 ` Frank Ch. Eigler
2005-10-07 21:19 ` Badari Pulavarty
2005-10-07 22:02 ` Frank Ch. Eigler
2005-10-07 22:42 ` Daniel P. Berrange
2005-10-08 1:54 Zhang, Yanmin
2005-10-08 16:45 Frank Ch. Eigler
2005-10-09 0:33 Zhang, Yanmin
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