[PATCH V4 0/7] Freq/CPU%/CORE_BUSY% support

From: Kan Liang
Date: Tue Aug 18 2015 - 17:32:47 EST


This patch set supports per-sample freq/CPU%/CORE_BUSY% print in perf
report -D and --stdio.
For printing these information, the perf.data file must have been obtained
by group read and using special events cycles, ref-cycles, msr/tsc/,
msr/aperf/ or msr/mperf/.

- Freq (MHz): The frequency during the sample interval. Needs cycles
ref-cycles event.
- CPU%: CPU utilization during the sample interval. Needs ref-cycles and
msr/tsc/ events.
- CORE_BUSY%: actual percent performance (APERF/MPERF%) during the
sample interval. Needs msr/aperf/ and msr/mperf/ events.

Here is an example:

$ perf record -e
'{cycles,ref-cycles,msr/tsc/,msr/mperf/,msr/aperf/}:S' ~/tchain_edit

$ perf report --stdio --group --show-freq-perf

Overhead FREQ MHz CPU% CORE_BUSY%
Command Shared Object Symbol
........................................ ......... ..... ..........
........... ................ ......................

99.54% 99.54% 99.53% 99.53% 99.53% 2301 96 99
tchain_edit tchain_edit [.] f3
0.20% 0.20% 0.20% 0.20% 0.20% 2301 98 99
tchain_edit tchain_edit [.] f2
0.05% 0.05% 0.05% 0.05% 0.05% 2300 98 99
tchain_edit [kernel.vmlinux] [k] read_tsc

Changes since V1:
- Save cpu max freq to header when recording
- Read cpu max freq and msr type from header when reporting

Changes since V2:
- Introduce generic FEAT for CPU related data stored
- Make cpu max freq and msr type part of perf_session_env
- rename cpu_u to cpu_util
- Don't save sample value in perf_sample and discards new iterator.
Calculating the freq_perf_info in add_entry_cb callback
- Introduce symbol_conf.freq_perf_type for related hpp column visibility

Changes since V3:
- add a identifier 'tag' for CPU attributes, max frequency.
- add backpointers to evlist for env, and evsel for evlist.
- Use bitmask for freq_perf_type
- Replace macros by functions to caculate freq, cpu_util and core_busy
- Move all caculation codes under symbol_conf.show_freq_perf condition.

Arnaldo Carvalho de Melo (1):
perf evsel: Add a backpointer to the evlist a evsel is in

Kan Liang (6):
perf,tools: introduce generic FEAT for CPU attributes
perf,tools: read msr pmu type from header.
perf,tools: rename perf_session_env and add backpointer to evlist
perf,tools: Dump per-sample freq/CPU%/CORE_BUSY% in report -D
perf,tools: caculate and save freq/CPU%/CORE_BUSY% in he_stat
perf,tools: Show freq/CPU%/CORE_BUSY% in perf report --stdio

tools/perf/Documentation/perf-report.txt | 12 ++++++
tools/perf/arch/common.c | 4 +-
tools/perf/arch/common.h | 2 +-
tools/perf/builtin-report.c | 56 +++++++++++++++++++++++++
tools/perf/ui/browser.h | 4 +-
tools/perf/ui/browsers/header.c | 2 +-
tools/perf/ui/browsers/hists.c | 12 +++---
tools/perf/ui/hist.c | 71 +++++++++++++++++++++++++++++---
tools/perf/util/cpumap.c | 32 ++++++++++++++
tools/perf/util/cpumap.h | 1 +
tools/perf/util/evlist.c | 2 +
tools/perf/util/evlist.h | 1 +
tools/perf/util/evsel.c | 2 +
tools/perf/util/evsel.h | 4 ++
tools/perf/util/header.c | 54 ++++++++++++++++++++++++
tools/perf/util/header.h | 12 +++++-
tools/perf/util/hist.h | 7 +++-
tools/perf/util/session.c | 36 +++++++++++++---
tools/perf/util/session.h | 64 ++++++++++++++++++++++++++++
tools/perf/util/sort.c | 3 ++
tools/perf/util/sort.h | 3 ++
tools/perf/util/symbol.c | 4 +-
tools/perf/util/symbol.h | 16 +++++--
23 files changed, 373 insertions(+), 31 deletions(-)

--
1.8.3.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/