From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: acme@kernel.org, peterz@infradead.org, mingo@redhat.com
Cc: tglx@linutronix.de, alexander.shishkin@linux.intel.com,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
will.deacon@arm.com, mark.rutland@arm.com, jolsa@redhat.com,
namhyung@kernel.org, adrian.hunter@intel.com, ast@kernel.org,
gregkh@linuxfoundation.org, hpa@zytor.com,
suzuki.poulosi@arm.com, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 0/6] perf: Add ioctl for PMU driver configuration
Date: Wed, 28 Nov 2018 15:01:12 -0700 [thread overview]
Message-ID: <1543442478-31465-1-git-send-email-mathieu.poirier@linaro.org> (raw)
This is the fourth iteration of a set that adds the capability to communicate
event specific configuration to PMU kernel drivers using an ioctl(). Though
targeted at the identification of CoreSight sinks when operating in CPU-wide
trace scenarios the functionality is made generic enough for anyone to use.
The work fits in a wider scheme to support CPU-wide trace scenarios on CoreSight
that is available here[1]. If someone is to test the functionality using this
branch, note that only dumping of CPU-wide trace data is working. Full decoding
capability is being verified.
Patch 1 to 3 deal with kernel enhancement to the perf core while patch 4 is
CoreSight specific. Patches 5 and 6 concentrate on the perf tools.
# Before this set:
root@juno:/home/linaro# perf record -e cs_etm/@20070000.etr/ -C 2,3 sleep 1
failed to mmap with 12 (Cannot allocate memory)
# After this set:
root@juno:/home/linaro# perf record -e cs_etm/@20070000.etr/ -C 2,3 sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 4.145 MB perf.data ]
Thanks,
Mathieu
[1]. https://git.linaro.org/people/mathieu.poirier/coresight.git/log/?h=cpu-wide-coresight
---
Changes for V4:
. Made passing of information between ioctl() and PMU simpler.
. Rebased to 4.20-rc4
Mathieu Poirier (6):
perf: Introduce ioctl to communicate driver configuration to kernel
perf/core: Use ioctl to communicate driver configuration to kernel
perf/aux: Make perf_event accessible to setup_aux()
coresight: Use PMU driver configuration for sink selection
perf tools: Make perf_evsel accessible to PMU driver configuration
code
perf tools: Use ioctl function to send sink configuration to kernel
arch/s390/kernel/perf_cpum_sf.c | 6 +--
arch/x86/events/intel/bts.c | 4 +-
arch/x86/events/intel/pt.c | 5 +-
drivers/hwtracing/coresight/coresight-etm-perf.c | 64 ++++++++++++++++------
drivers/perf/arm_spe_pmu.c | 6 +--
include/linux/perf_event.h | 40 +++++++++++++-
include/uapi/linux/perf_event.h | 1 +
kernel/events/core.c | 69 ++++++++++++++++++++++++
kernel/events/ring_buffer.c | 2 +-
tools/include/uapi/linux/perf_event.h | 1 +
tools/perf/arch/arm/util/cs-etm.c | 67 ++++++++++++++++++++++-
tools/perf/arch/arm/util/cs-etm.h | 3 +-
tools/perf/util/drv_configs.c | 30 +++--------
tools/perf/util/evsel.c | 7 +++
tools/perf/util/evsel.h | 1 +
tools/perf/util/pmu.h | 3 +-
16 files changed, 257 insertions(+), 52 deletions(-)
--
2.7.4
next reply other threads:[~2018-11-28 22:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-28 22:01 Mathieu Poirier [this message]
2018-11-28 22:01 ` [PATCH v4 1/6] perf: Introduce ioctl to communicate driver configuration to kernel Mathieu Poirier
2018-11-29 7:47 ` Greg KH
2018-11-28 22:01 ` [PATCH v4 2/6] perf/core: Use " Mathieu Poirier
2018-11-29 7:48 ` Greg KH
2018-11-28 22:01 ` [PATCH v4 3/6] perf/aux: Make perf_event accessible to setup_aux() Mathieu Poirier
2018-11-28 22:01 ` [PATCH v4 4/6] coresight: Use PMU driver configuration for sink selection Mathieu Poirier
2018-11-29 7:49 ` Greg KH
2018-11-29 23:09 ` Mathieu Poirier
2018-11-30 7:42 ` Greg KH
2018-11-30 18:05 ` Mathieu Poirier
2018-11-28 22:01 ` [PATCH v4 5/6] perf tools: Make perf_evsel accessible to PMU driver configuration code Mathieu Poirier
2018-11-28 22:01 ` [PATCH v4 6/6] perf tools: Use ioctl function to send sink configuration to kernel Mathieu Poirier
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