<div dir="ltr">How big are the files that you're dealing with?<div>If they're small you can just make a ramdisk and try running everything in there.</div><div>It's not a final solution, but between that and strace you should be able to see if that's really the issue or not.</div>
<div><br></div><div>Are you compiling from source? If you are, then there are a bunch of debugging tools you can use as well as doing things like timing individual commands, and seeing how many times each line of code is run.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Dec 11, 2013 at 10:48 PM, Stephan Henning <span dir="ltr"><<a href="mailto:shenning@gmail.com" target="_blank">shenning@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">This is a RedHat6 Enterprise install. <div><br></div><div>I don't think htop has the data I need, but I'll check. I'm not familiar with ntop and I didn't consider using trace for this, I'll check that as well.</div>
<div><br></div><div>The goal is to record read/write rates and block sizes. I'm pretty sure I am bottlenecking against the drive array, I'm hoping I can get some definitive answers from this. </div></div><div class="HOEnZb">
<div class="h5"><div class="gmail_extra">
<br><br><div class="gmail_quote">On Wed, Dec 11, 2013 at 6:01 PM, David <span dir="ltr"><<a href="mailto:ainut@knology.net" target="_blank">ainut@knology.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
ntop might do the trick, but not available in Fedora.<div><div><br>
<br>
<br>
<div>David wrote:<br>
</div>
<blockquote type="cite">
Can 'htop' show open files?<br>
<br>
For intensive live net data, look at WireShark for linux.<br>
<br>
<br>
<div>David wrote:<br>
</div>
<blockquote type="cite">
If that's what you're looking for, there are several (free)
programs you could run from the command line in a separate
window/screen while your program is running that give you all
you're asking about. Sort of an equivalent to Winblows "System
Explorer." What flavor or Linux are you using? <br>
<br>
David M.<br>
<br>
<br>
<div>Devin Boyer wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Try something like "strace -T myapp" or "strace
-T -c myapp"; they'll show the system calls being made and
the amount of time spent in each. It's slightly different
information than iostat, but it may be useful in figuring
out what and where your program is performing io access.</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, Dec 11, 2013 at 3:37 PM,
Stephan Henning <span dir="ltr"><<a href="mailto:shenning@gmail.com" target="_blank">shenning@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>No, iostat will normally just dump to the
terminal window, but I'd like to pipe it's
output to a file so I can parse it later. <br>
<br>
</div>
My end goal here is to be able to generate a log
of iostat output while I run this program, I'm
trying to determine exactly how hard this program
is hitting my harddrive and at what points during
it's run does it access the drive the most
frequently. <br>
<br>
</div>
I've done something similar in bash before, but it
is rather clunky. <br>
<br>
</div>
I'll take a look at exec and see if I can use it. <br>
</div>
<div>
<div>
<div class="gmail_extra"> <br>
<br>
<div class="gmail_quote">On Wed, Dec 11, 2013 at
4:46 PM, David <span dir="ltr"><<a href="mailto:ainut@knology.net" target="_blank">ainut@knology.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Do you
need to do anything with the results or just
need them displayed?<br>
If you need to manipulate the results,
consider using Perl, <br>
or if C or C++,<br>
in your 'exec' call, pipe the output to a
file, then just read that file into your
program.<br>
Ain't UNIX great?
<div><br>
<br>
David M.<br>
<br>
<br>
<div>Stephan Henning wrote:<br>
</div>
</div>
<blockquote type="cite">
<div>
<div dir="ltr">
<div>I'd like to take some metrics
with iostat while I have a specific
program running, is there a way to
wrap iostat around another program
(it is called from the command line)
so that iostat ends when the program
finishes running? <br>
<br>
</div>
I know I can do it with a bash script,
but I'm hoping for a more elegant
solution. <br>
</div>
<br>
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