Arnaldo, Any comments on this series?
On Thu, Feb 14, 2013 at 1:57 PM, Stephane Eranian <eran...@google.com> wrote: > This patch series contains improvement to the aggregation support > in perf stat. > > First, the aggregation code is refactored and a aggr_mode enum > is defined. There is also an important bug fix for the existing > per-socket aggregation. > > Second, the option --aggr-socket is renamed --per-socket. > > Third, the patch adds a new --per-core option to perf stat. > It aggregates counts per physical core and becomes useful on > systems with hyper-threading. The cores are presented per > socket: S0-C1, means socket 0 core 1. Note that the core number > represents its physical core id. As such, numbers may not always > be contiguous. All of this is based on topology information available > in sysfs. > > Per-core aggregation can be combined with interval printing: > > # perf stat -a --per-core -I 1000 -e cycles sleep 100 > # time core cpus counts events > 1.000101160 S0-C0 2 6,051,254,899 cycles > 1.000101160 S0-C1 2 6,379,230,776 cycles > 1.000101160 S0-C2 2 6,480,268,471 cycles > 1.000101160 S0-C3 2 6,110,514,321 cycles > 2.000663750 S0-C0 2 6,572,533,016 cycles > 2.000663750 S0-C1 2 6,378,623,674 cycles > 2.000663750 S0-C2 2 6,264,127,589 cycles > 2.000663750 S0-C3 2 6,305,346,613 cycles > > For instance here on this SNB machine, we can see that the load > is evenly balanced across all 4 physical core (HT is on). > > In v2, we print events across all cores or socket and we renamed > --aggr-socket to --per-socket and renamed --aggr-core to --per-core > > Signed-off-by: Stephane Eranian <eran...@google.com> > > Stephane Eranian (3): > perf stat: refactor aggregation code > perf stat: rename --aggr-socket to --per-socket > perf stat: add per-core aggregation > > tools/perf/Documentation/perf-stat.txt | 10 +- > tools/perf/builtin-stat.c | 237 > ++++++++++++++++++++------------ > tools/perf/util/cpumap.c | 86 ++++++++++-- > tools/perf/util/cpumap.h | 12 ++ > 4 files changed, 241 insertions(+), 104 deletions(-) > > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
