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Date: Tue, 22 Jan 2008 19:42:25 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Stefan Lambrev <stefan.lambrev@moneybookers.com>
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Subject: Re: gettimeofday() in hping
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Stefan Lambrev wrote:

>> You should use hwpmc to verify where the application is really 
>> spending time, since gettimeofday doesn't seem to account for it all.
> pmc: Unknown Intel CPU.
> module_register_init: MOD_LOAD (hwpmc, 0xffffffff8029906d, 
> 0xffffffff8054c500) error 78

OK, this is the famous problem with modern CPUs that jkoshy has declined 
to work around :(  There are patches for this in perforce, see

http://perforce.freebsd.org/changeView.cgi?CH=126189

> What was the other way to do this profiling?

No other that I have found to be useful.

> Can ktrace help?

Not really, it only tells you what syscalls were made.

Kris