On Feb 25, 2010, at 6:09 PM, Scott Wood wrote:
> This implements perf_event support for the Freescale embedded performance
> monitor, based on the existing perf_event.c that supports server/classic
> chips.
>
> Some limitations:
> - Performance monitor interrupts are regular EE interrupts, and thus you
> can't profile places with interrupts disabled. We may want to implement
> soft IRQ-disabling, with perfmon interrupts exempted and treated as NMIs.
> - When trying to schedule multiple event groups at once, and using
> restricted events, situations could arise where scheduling fails even
> though it would be possible. Consider three groups, each with two events.
> One group has restricted events, the others don't. The two non-restricted
> groups are scheduled, then one is removed, which happens to occupy the two
> counters that can't do restricted events. The remaining non-restricted
> group will not be moved to the non-restricted-capable counters to make
> room if the restricted group tries to be scheduled.
>
> Signed-off-by: Scott Wood <scottw...@freescale.com>
> ---
> Changes from previous version:
> - Factored out callchain makefile patch
> - Split up header files
> - Renamed pmu struct
> - Added threshold support
>
> arch/powerpc/include/asm/perf_event.h | 133 +----
> arch/powerpc/include/asm/perf_event_fsl_emb.h | 50 ++
> .../asm/{perf_event.h => perf_event_server.h} | 4 +-
> arch/powerpc/include/asm/reg_fsl_emb.h | 2 +-
> arch/powerpc/kernel/Makefile | 4 +
> arch/powerpc/kernel/cputable.c | 2 +-
> arch/powerpc/kernel/e500-pmu.c | 129 ++++
> arch/powerpc/kernel/perf_event_fsl_emb.c | 654 ++++++++++++++++++++
> arch/powerpc/platforms/Kconfig.cputype | 10 +
> 9 files changed, 874 insertions(+), 114 deletions(-)
> rewrite arch/powerpc/include/asm/perf_event.h (92%)
> create mode 100644 arch/powerpc/include/asm/perf_event_fsl_emb.h
> rename arch/powerpc/include/asm/{perf_event.h => perf_event_server.h} (98%)
> create mode 100644 arch/powerpc/kernel/e500-pmu.c
> create mode 100644 arch/powerpc/kernel/perf_event_fsl_emb.c
Paul do you intend to Ack this or don't care?
- k
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