[haiku-development] Re: Profiling our freebsd network compability libs
- From: Fredrik Holmqvist <fredrik.holmqvist@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 19 Jul 2012 12:35:58 +0200
2012/7/19 Ingo Weinhold <ingo_weinhold@xxxxxx>:
> On 2012-07-18 at 22:32:05 [+0200], Fredrik Holmqvist
> <fredrik.holmqvist@xxxxxxxxx> wrote:
>> does anyone have any suggestions on a good way to see where most time
>> is spent in these libs?
>> That is :
>> src/libs/compat/freebsd_network
>> src/libs/compat/freebsd_wlan
>
> There's the "profile" command. It does sampling-based profiling and by
> default also records kernel hits. The libraries are static libraries linked
> into the driver, so it is not possible to discriminate hits in those from
> others in the driver -- you'll have to go by function name.
>
> If the code in question is executed in a userland thread, you can profile
> just that program. If not, you'll have to use the "-a" option to profile
> all teams.
>
> The output is printed when profiling is stopped. Alternatively you can use
> the "-v" option to produce callgrind compatible output. This can be read by
> the KCachegrind application (KDE) which is very nice for closer analysis.
>
> Also peruse the "--help" output. There might be a few more interesting
> options.
That sounds perfect. Thanks.
/Fredrik Holmqvist, TQH
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