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Message-Id: <1371824448-7306-1-git-send-email-eranian@google.com> Date: Fri, 21 Jun 2013 16:20:40 +0200 From: Stephane Eranian <eranian@...gle.com> To: linux-kernel@...r.kernel.org Cc: peterz@...radead.org, mingo@...e.hu, ak@...ux.intel.com, acme@...hat.com, jolsa@...hat.com, namhyung.kim@....com Subject: [PATCH 0/8] perf: add ability to sample physical data addresses This patch series extends perf_events with the ability to sample physical data addresses. This is useful with the memory access sampling mode added just recently. In particular, it helps disambiguate data addresses between two processes, such as in the case of a shared memory segment mapped at different addresses in different processes. The patch adds the PERF_SAMPLE_PHYS_ADDR sample_type. A 64-bit address is added to the sample record for the corresponding event. On Intel X86, it is used with the PEBS Load Latency support. On other architectures, zero is returned. The patch series also demonstrates the use of this new feature by extending perf report, mem, record with a --phys-addr option. When enable, it will capture physical data address and display it. This is implemented as a new sort_order (symbol_paddr). $ perf mem --phys-addr -t load rec ... $ perf mem --phys-addr -t load rep ... Note that for now on X86, only user addresses are converted to physical whenever possible. Kernel addresses will show as -1. Thanks to Hugh Dickins for the uvirt_to_phys_nmi() code. The series contains a couple of patches related to PEBS in general: - Patch 1 contains a small bug fix to clear the PEBS-LL bits in pebs_enable in intel_pmu_pebs_disable(). - Patch 2 removes event->flags because it is not used anymore. The code now uses event->hw.constraints->flags. Signed-off-by: Stephane Eranian <eranian@...gle.com> --- Stephane Eranian (8): perf,x86: disable PEBS-LL in intel_pmu_pebs_disable() perf,x86: drop event->flags and use hw.constraint->flags perf,x86: add uvirt_to_phys_nmi helper function perf: add PERF_SAMPLE_PHYS_ADDR sample type perf,x86: add support for PERF_SAMPLE_PHYS_ADDR for PEBS-LL perf tools: add infrastructure to handle PERF_SAMPLE_PHYS_ADDR perf record: add option to sample physical load/store addresses perf mem: add physical addr sampling support arch/x86/include/asm/uaccess.h | 1 + arch/x86/kernel/cpu/perf_event_intel.c | 6 +- arch/x86/kernel/cpu/perf_event_intel_ds.c | 28 +++++--- arch/x86/lib/usercopy.c | 43 +++++++++++ include/linux/perf_event.h | 3 +- include/uapi/linux/perf_event.h | 3 +- kernel/events/core.c | 6 ++ tools/perf/Documentation/perf-record.txt | 4 ++ tools/perf/builtin-mem.c | 116 +++++++++++++++++++++++------- tools/perf/builtin-record.c | 2 + tools/perf/builtin-report.c | 2 +- tools/perf/perf.h | 1 + tools/perf/util/event.h | 1 + tools/perf/util/evsel.c | 16 ++++- tools/perf/util/hist.c | 4 +- tools/perf/util/hist.h | 1 + tools/perf/util/machine.c | 1 + tools/perf/util/session.c | 6 ++ tools/perf/util/sort.c | 42 +++++++++++ tools/perf/util/sort.h | 1 + tools/perf/util/symbol.h | 1 + 21 files changed, 243 insertions(+), 45 deletions(-) -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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