Thanks to all for the tips. I’ll give it a go.
From: Wireshark-dev [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx]
On Behalf Of Pascal Quantin
Sent: 15 October 2017 21:50
To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
Subject: Re: [Wireshark-dev] Tips regarding measuring function execution times
2017-10-15 22:40 GMT+02:00 João Valverde <joao.valverde@xxxxxxxxxxxxxxxxxx>:
On 15-10-2017 21:32, Peter Wu wrote:
On Sat, Oct 14, 2017 at 02:18:39PM +0000, Paul Offord 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?
Not sure about the Status line question, but you can measure elapsed
microseconds with something like:
guint64 start_time, end_time;
start_time = g_get_monotonic_time();
// ...
end_time = g_get_monotonic_time();
// ...
g_print("elapsed us: %" G_GUINT64_FORMAT, end_time - start_time);
https://developer.gnome.org/glib/stable/glib-Date-and-Time-Functions.html#g-get-monotonic-time
I think console output doesn't work on Windows for graphical applications, or something like that. There isn't a better standard mechanism for debug output in Wireshark, that I know of.
You can make it appear with Edit -> Preferences -> Advanced -> change gui.console_open option to ALWAYS.
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