linux-toradex.git/arch/powerpc/include/asm/perf_event_server.h, branch v3.17

powerpc/perf: Pass the struct perf_events down to compute_mmcr()

2014-07-28T04:30:47+00:00

To support per-event exclude settings on Power8 we need access to the
struct perf_events in compute_mmcr().

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/perf: Add PPMU_ARCH_207S define

2014-07-11T02:55:07+00:00

Instead of separate bits for every POWER8 PMU feature, have a single one
for v2.07 of the architecture.

This saves us adding a MMCR2 define for a future patch.

Cc: stable@vger.kernel.org
Signed-off-by: Joel Stanley 
Acked-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/perf: Define perf_event_print_debug() to print PMU register values

2014-03-23T22:48:23+00:00

Currently the sysrq ShowRegs command does not print any PMU registers as
we have an empty definition for perf_event_print_debug(). This patch
defines perf_event_print_debug() to print various PMU registers.

Example output:

CPU: 0 PMU registers, ppmu = POWER7 n_counters = 6
PMC1:  00000000 PMC2: 00000000 PMC3: 00000000 PMC4: 00000000
PMC5:  00000000 PMC6: 00000000 PMC7: deadbeef PMC8: deadbeef
MMCR0: 0000000080000000 MMCR1: 0000000000000000 MMCRA: 0f00000001000000
SIAR:  0000000000000000 SDAR:  0000000000000000 SIER:  0000000000000000

Signed-off-by: Anshuman Khandual 
[mpe: Fix 32 bit build and rework formatting for compactness]
Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

Merge tag 'v3.11-rc5' into perf/core

2013-08-15T08:00:09+00:00

Merge Linux 3.11-rc5, to sync up with the latest upstream fixes since -rc1.

Signed-off-by: Ingo Molnar

powerpc/perf: Export PERF_EVENT_CONFIG_EBB_SHIFT to userspace

2013-08-01T03:11:46+00:00

We use bit 63 of the event code for userspace to request that the event
be counted using EBB (Event Based Branches). Export this value, making
it part of the API - though only on processors that support EBB.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

2013-07-19T07:35:30+00:00

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

 * Add missing 'finished_round' event forwarding in 'perf inject', from Adrian Hunter.

 * Assorted tidy ups, from Adrian Hunter.

 * Fall back to sysfs event names when parsing fails, from Andi Kleen.

 * List pmu events in perf list, from Andi Kleen.

 * Cleanup some memory allocation/freeing uses, from David Ahern.

 * Add option to collapse undesired parts of call graph, from Greg Price.

 * Prep work for multi perf data file storage, from Jiri Olsa.

 * Add support for more than two files comparision in 'perf diff', from Jiri Olsa

 * A few more 'perf test' improvements, from Jiri Olsa

 * libtraceevent cleanups, from Namhyung Kim.

 * Remove odd build stall in 'perf sched' by moving a large struct initialization
   from a local variable to a global one, from Namhyung Kim.

 * Add support for callchains in the gtk UI, from Namhyung Kim.

 * Do not apply symfs for an absolute vmlinux path, fix from Namhyung Kim.

 * Use default include path notation for libtraceevent, from Robert Richter.

 * Fix 'make tools/perf', from Robert Richter.

 * Make Power7 events available, from Runzhen Wang.

 * Add --objdump option to 'perf top', from Sukadev Bhattiprolu.

Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Ingo Molnar

perf tools: Make Power7 events available for perf

2013-07-12T16:46:09+00:00

Power7 supports over 530 different perf events but only a small subset
of these can be specified by name, for the remaining events, we must
specify them by their raw code:

        perf stat -e r2003c 

This patch makes all the POWER7 events available in sysfs.  So we can
instead specify these as:

        perf stat -e 'cpu/PM_CMPLU_STALL_DFU/' 

where PM_CMPLU_STALL_DFU is the r2003c in previous example.

Before this patch is applied, the size of power7-pmu.o is:

$ size arch/powerpc/perf/power7-pmu.o
   text	   data	    bss	    dec	    hex	filename
   3073	   2720	      0	   5793	   16a1	arch/powerpc/perf/power7-pmu.o

and after the patch is applied, it is:

$ size arch/powerpc/perf/power7-pmu.o
   text	   data	    bss	    dec	    hex	filename
  15950	  31112	      0	  47062	   b7d6	arch/powerpc/perf/power7-pmu.o

For the run time overhead, I use two scripts, one is "event_name.sh",
which contains 50 event names, it looks like:

 # ./perf record  -e 'cpu/PM_CMPLU_STALL_DFU/' -e .....  /bin/sleep 1

the other one is named "event_code.sh" which use corresponding  events
raw
code instead of events names, it looks like:

 # ./perf record -e r2003c -e ......  /bin/sleep 1

below is the result.

Using events name:

[root@localhost perf]# time ./event_name.sh
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.002 MB perf.data (~102 samples) ]

real	0m1.192s
user	0m0.028s
sys	0m0.106s

Using events raw code:

[root@localhost perf]# time ./event_code.sh
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.003 MB perf.data (~112 samples) ]

real	0m1.198s
user	0m0.028s
sys	0m0.105s

Signed-off-by: Runzhen Wang 
Acked-by: Michael Ellerman 
Cc: icycoder@gmail.com
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Runzhen Wang 
Cc: Sukadev Bhattiprolu 
Cc: Xiao Guangrong 
Link: http://lkml.kernel.org/r/1372407297-6996-3-git-send-email-runzhen@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

powerpc/perf: Core EBB support for 64-bit book3s

2013-07-01T01:50:10+00:00

Add support for EBB (Event Based Branches) on 64-bit book3s. See the
included documentation for more details.

EBBs are a feature which allows the hardware to branch directly to a
specified user space address when a PMU event overflows. This can be
used by programs for self-monitoring with no kernel involvement in the
inner loop.

Most of the logic is in the generic book3s code, primarily to avoid a
proliferation of PMU callbacks.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/perf: Enable branch stack sampling framework

2013-04-26T06:13:02+00:00

Provides basic enablement for perf branch stack sampling framework on
POWER8 processor based platforms. Adds new BHRB related elements into
cpu_hw_event structure to represent current BHRB config, BHRB filter
configuration, manage context and to hold output BHRB buffer during
PMU interrupt before passing to the user space. This also enables
processing of BHRB data and converts them into generic perf branch
stack data format.

Signed-off-by: Anshuman Khandual 
Signed-off-by: Benjamin Herrenschmidt

powerpc/perf: Add new BHRB related generic functions, data and flags

2013-04-26T06:11:12+00:00

This patch adds couple of generic functions to power_pmu structure
which would configure the BHRB and it's filters. It also adds
representation of the number of BHRB entries present on the PMU.
A new PMU flag PPMU_BHRB would indicate presence of BHRB feature.

Signed-off-by: Anshuman Khandual 
Signed-off-by: Benjamin Herrenschmidt