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Subject[PATCH 0/2] perf: add new uncore command
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This patchset adds a new command to perf: perf uncore.
It is used to measure processor socket-level metrics
on a system-wide basis and at all priv levels.

The command comes with a set of predefined key metrics
which are useful to measure multi-socket system imbalance
and various bandwidths.

The following metrics are currently defined:
- memory bandwidth (Nehalem, Westmere, SandyBridge-EP)
- PCIe bandwidth (SandyBridge-EP)
- QPI bandwidth (SandyBridge-EP)
- C-state residency (SandyBridge-EP)

Others can be added in the future.

The command provides options to modify the unit of the metrics
(default: MB/s for bandwidth).

Example on Nehalem:

# perf uncore
#------------------------------
# Socket0 |
#------------------------------
# RAM Bandwidth |
# Wr Rd|
# MB/s MB/s|
#------------------------------
4954.99 14897.29
4953.97 14894.56
4947.52 14874.97

To make plotting easier, the output can be augmented with a timestamp:

# perf uncore -T
#----------------------------------------
# | Socket0 |
# |------------------------------
# Time | RAM Bandwidth |
# in | Wr Rd|
# secs | MB/s MB/s|
#----------------------------------------
1 4952.50 14890.49
2 4955.55 14900.19
3 4949.13 14879.60
4 4954.66 14896.26

The code is split between generic layer (builtin-uncore.c) and
an arch specific layer (arch/*/util/uncore.c). All events are
hardcoded because they don't change for a given processor and
metric computation requires combining multiple events.

Signed-off-by: Stephane Eranian <eranian@google.com>
---

Stephane Eranian (2):
perf tools: add cpu_map__get_socket()
perf: add new perf uncore command

tools/perf/Documentation/perf-uncore.txt | 88 ++++
tools/perf/Makefile | 1 +
tools/perf/arch/x86/Makefile | 1 +
tools/perf/arch/x86/util/uncore.c | 539 ++++++++++++++++++++++
tools/perf/builtin-uncore.c | 739 ++++++++++++++++++++++++++++++
tools/perf/builtin.h | 1 +
tools/perf/command-list.txt | 1 +
tools/perf/perf.c | 1 +
tools/perf/util/cpumap.c | 26 ++
tools/perf/util/cpumap.h | 1 +
tools/perf/util/uncore.h | 56 +++
11 files changed, 1454 insertions(+)
create mode 100644 tools/perf/Documentation/perf-uncore.txt
create mode 100644 tools/perf/arch/x86/util/uncore.c
create mode 100644 tools/perf/builtin-uncore.c
create mode 100644 tools/perf/util/uncore.h

--
1.7.10.4



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