On 11/18/2010 06:34 PM, Josef Weidendorfer wrote: > We could extend the simulator do assume separate L1 caches per thread, assuming a > fixed pinning of each thread to its own core...
By default Linux appears to pride itself on moving a thread in circle
through all the cores on a machine! :)
We do explicit pinning of threads to cores. If valgrind did support it,
would it be possible to intercept the function to set affinity and pin
the threads?
I have no idea what cache hit/miss I have. Is there a way to see it in
KCachegrind? I have a feeling there is somethign wrong in the GUI: the
event pane just has a single type "Instruction Fetch". You talk about
other event types but I can't see any such thing...?
> This gives quite a rough estimation, but usually it highlights the
bottlenecks.
> If you do not have cache issues (ie. a large number of misses) anyway,
the estimation
> of course will be quite wrong.
So once I optimize enough and think that my major issue is a context
switching issue, can I use valgrind to find those? That is, can I
somehow get callgrind to flag the points where a kernel call is made to
warn me of a possible context switch, suspend, or whatnot?
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