lkml.org 
[lkml]   [2009]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectPerf events/ARM
Hi,

I'm looking at adding support for the hardware performance counters in ARMv6
using the new perf events framework. I have a simple setup that uses the
counters on their own, but wrt the perf events framework:

- what are the requirements of set_perf_event_pending() and
perf_event_do_pending()? As far as I can tell from sparc/x86/powerpc,
set_perf_event_pending() triggers an interrupt that then calls
perf_event_do_pending(). Does perf_event_do_pending need to run in
interrupt context or could I use a soft IRQ if platforms don't have a
spare IRQ?

- ARM does not have proper support for atomic64's. Other than
performance, would there be any known problems with using the generic
spinlocked atomic64's?

Thanks,

Jamie


\
 
 \ /
  Last update: 2009-12-01 13:05    [W:0.035 / U:1.000 seconds]
©2003-2014 Jasper Spaans. Advertise on this site