Re: Tips regarding measuring function execution times

[Paul Offord <Paul.Offord () advance7 com>]

Thanks Graham,

I wasn’t aware of that.  The hot path concept is the same as I get from PerfView but I may need to get even more 
granular, i.e. code blocks rather than functions, hence the interest in  timers.  I also thought that timing would give 
me a cross check.  I plan to look into Guy’s suggestion regarding CPU time – as he says, I only need relative values.  
I’ll try to find some time this weekend.

Best regards…Paul

From: Wireshark-dev [mailto:wireshark-dev-bounces () wireshark org] On Behalf Of Graham Bloice
Sent: 16 October 2017 11:11
To: Developer support list for Wireshark <wireshark-dev () wireshark org>
Subject: Re: [Wireshark-dev] Tips regarding measuring function execution times

Visual Studio

On 14 October 2017 at 15:18, Paul Offord <Paul.Offord () advance7 com<mailto:Paul.Offord () advance7 com>> wrote:
I’m investigating a performance problem with the TRANSUM dissector.  I’d like to measure the accumulated time taken to 
execute a function in a Release build.  My basic idea is to do something like this:

guint32 execute_time_us;
.
.
start_stopwatch(&execute_time_us);
function_call_to_be_measured();
pause_stopwatch(&execute_time_us);

.
.
.

stop_and_output_stopwatch(&execute_time_us);

Is there a standard way to do this in Wireshark?  How can I output the accumulated time on, say, the Status Line?

Best regards…Paul

Visual Studio (Pro at least, not sure about Community), includes profiling tools, both sampling (less accurate, but 
least invasive) and instrumented (more accurate, more invasive).

See here for starters: https://msdn.microsoft.com/en-us/library/ms182372.aspx

--
Graham Bloice

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