23 Aug
2005
23 Aug
'05
1:11 p.m.
On Tue Aug 23, 2005 at 09:59:23 +0200, fabs0028@free.fr wrote:
well i 'd like to measure the latency of the interrupts in l4linux, between the moment it is triggered in fiasco and the moment it is aknowledged in the top-halves of linux.
I guess the simplest way to do this in software is to write a jdb trace entry in the interupt handler and another on the in the userland code where it's handled. The jdb trace view will show you the TSC differences between the two log entries (cycle through the different modes). This will give you a little overhead of course, which you may want to neglect.
Adam
--
Adam adam@os.inf.tu-dresden.de
Lackorzynski http://os.inf.tu-dresden.de/~adam/