| Message ID | 1685438374-33287-8-git-send-email-renyu.zj@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add JSON metrics for arm CMN and Yitian710 DDR | expand |
On Tue, May 30, 2023 at 2:19 AM Jing Zhang <renyu.zj@linux.alibaba.com> wrote: > > Alibaba's T-Head ali_drw PMU supports DDR bandwidth metrics. Update > its usage in the documentation. > > Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com> Acked-by: Ian Rogers <irogers@google.com> Thanks, Ian > --- > Documentation/admin-guide/perf/alibaba_pmu.rst | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/admin-guide/perf/alibaba_pmu.rst b/Documentation/admin-guide/perf/alibaba_pmu.rst > index 11de998..7d84002 100644 > --- a/Documentation/admin-guide/perf/alibaba_pmu.rst > +++ b/Documentation/admin-guide/perf/alibaba_pmu.rst > @@ -88,6 +88,11 @@ data bandwidth:: > -e ali_drw_27080/hif_rmw/ \ > -e ali_drw_27080/cycle/ -- sleep 10 > > +Example usage of counting all memory read/write bandwidth by metric:: > + > + perf stat -M ddr_read_bandwidth.all -- sleep 10 > + perf stat -M ddr_write_bandwidth.all -- sleep 10 > + > The average DRAM bandwidth can be calculated as follows: > > - Read Bandwidth = perf_hif_rd * DDRC_WIDTH * DDRC_Freq / DDRC_Cycle > -- > 1.8.3.1 >
diff --git a/Documentation/admin-guide/perf/alibaba_pmu.rst b/Documentation/admin-guide/perf/alibaba_pmu.rst index 11de998..7d84002 100644 --- a/Documentation/admin-guide/perf/alibaba_pmu.rst +++ b/Documentation/admin-guide/perf/alibaba_pmu.rst @@ -88,6 +88,11 @@ data bandwidth:: -e ali_drw_27080/hif_rmw/ \ -e ali_drw_27080/cycle/ -- sleep 10 +Example usage of counting all memory read/write bandwidth by metric:: + + perf stat -M ddr_read_bandwidth.all -- sleep 10 + perf stat -M ddr_write_bandwidth.all -- sleep 10 + The average DRAM bandwidth can be calculated as follows: - Read Bandwidth = perf_hif_rd * DDRC_WIDTH * DDRC_Freq / DDRC_Cycle
Alibaba's T-Head ali_drw PMU supports DDR bandwidth metrics. Update its usage in the documentation. Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com> --- Documentation/admin-guide/perf/alibaba_pmu.rst | 5 +++++ 1 file changed, 5 insertions(+)