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| author | Alexander Antonov <alexander.antonov@linux.intel.com> | 2021-04-19 11:41:46 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-20 13:40:20 +0200 |
| commit | f9ed693e8bc0e7de9eb766a3c7178590e8bb6cd5 (patch) | |
| tree | 492dd71987ce6a737929aaa04457d40808470c6d /tools/perf/command-list.txt | |
| parent | perf stat: Helper functions for PCIe root ports list in iostat mode (diff) | |
| download | linux-f9ed693e8bc0e7de9eb766a3c7178590e8bb6cd5.tar.xz linux-f9ed693e8bc0e7de9eb766a3c7178590e8bb6cd5.zip | |
perf stat: Enable iostat mode for x86 platforms
This functionality is based on recently introduced sysfs attributes for
Intel® Xeon® Scalable processor family (code name Skylake-SP):
Commit bb42b3d39781d7fc ("perf/x86/intel/uncore: Expose an Uncore unit to IIO PMON mapping")
Mode is intended to provide four I/O performance metrics in MB per each
PCIe root port:
- Inbound Read: I/O devices below root port read from the host memory
- Inbound Write: I/O devices below root port write to the host memory
- Outbound Read: CPU reads from I/O devices below root port
- Outbound Write: CPU writes to I/O devices below root port
Each metric requiries only one uncore event which increments at every 4B
transfer in corresponding direction. The formulas to compute metrics
are generic:
#EventCount * 4B / (1024 * 1024)
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey V Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210419094147.15909-4-alexander.antonov@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/command-list.txt')
| -rw-r--r-- | tools/perf/command-list.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt index 825a12e8d694..4aa034aefa33 100644 --- a/tools/perf/command-list.txt +++ b/tools/perf/command-list.txt @@ -14,6 +14,7 @@ perf-config mainporcelain common perf-evlist mainporcelain common perf-ftrace mainporcelain common perf-inject mainporcelain common +perf-iostat mainporcelain common perf-kallsyms mainporcelain common perf-kmem mainporcelain common perf-kvm mainporcelain common |