linux-kernel - keypad/touchscreen driver events latencies using LTTng on ARM?

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Message-ID: <5d5443650811301000t58665a7j7aa93be52325a23b@mail.gmail.com>
Date:	Sun, 30 Nov 2008 23:30:19 +0530
From:	"Trilok Soni" <soni.trilok@...il.com>
To:	"Mathieu Desnoyers" <mathieu.desnoyers@...ymtl.ca>
Cc:	linux-kernel@...r.kernel.org, ltt-dev@...ts.casi.polymtl.ca
Subject: keypad/touchscreen driver events latencies using LTTng on ARM?

Hi,

I would like to try LTTng to measure the keypad and touchscreen
drivers events latency on ARM based board, which typically runs less
than 1GHz frequency.  I have recently tried LTTng patches as per
compatibility list on LTTng website on 2.6.25 kernel on ARM11 based
board, but on LTTv it shows the IRQ min/max interval times on
nanoseconds precision, would that be correct? Because I thought it
could be possible to microseconds format until with hrtimers support
right? Just guide so that I can use this tool to effectively measure
driver latencies. Thanks.

-- 
---Trilok Soni
http://triloksoni.wordpress.com
http://www.linkedin.com/in/triloksoni
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