Re: how to measure scheduler latency on powerpc? realfeel doesn't work due to /dev/rtc issues

William Lee Irwin III
2003-05-09T06:07:44Z

William Lee Irwin III wrote:
>> Try the timebase instead.

On Fri, May 09, 2003 at 02:14:13AM -0400, Chris Friesen wrote:
> The timestamp is not hard to get. The problem is getting a
> medium-frequency (2KHz or so) hardware interrupt to drive the test.
> On intel, you can do this by programming /dev/rtc. This does not work in
> powerpc.

I don't understand why you're obsessed with interrupts. Just run your
load and spray the scheduler latency stats out /proc/

-- wli