On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov <[email protected]> wrote: > > This functionality is based on recently introduced sysfs attributes > for Intel® Xeon® Scalable processor family (code name Skylake-SP): > Commit bb42b3d39781 ("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 > IIO stack: > - Inbound Read: I/O devices below IIO stack read from the host memory > - Inbound Write: I/O devices below IIO stack write to the host memory > - Outbound Read: CPU reads from I/O devices below IIO stack > - Outbound Write: CPU writes to I/O devices below IIO stack > > Each metric requiries only one IIO event which increments at every 4B > transfer in corresponding direction. The formulas to compute metrics > are generic: > #EventCount * 4B / (1024 * 1024)
Hmm.. maybe we can do this with JSON metrics, no? > > Signed-off-by: Alexander Antonov <[email protected]> > --- > tools/perf/Documentation/perf-iiostat.txt | 89 ++++++ > tools/perf/Makefile.perf | 5 +- > tools/perf/arch/x86/util/Build | 1 + > tools/perf/arch/x86/util/iiostat.c | 337 ++++++++++++++++++++++ > tools/perf/command-list.txt | 1 + > tools/perf/perf-iiostat.sh | 12 + > 6 files changed, 444 insertions(+), 1 deletion(-) > create mode 100644 tools/perf/Documentation/perf-iiostat.txt > create mode 100644 tools/perf/perf-iiostat.sh > > diff --git a/tools/perf/Documentation/perf-iiostat.txt > b/tools/perf/Documentation/perf-iiostat.txt > new file mode 100644 > index 000000000000..38b5697b0d85 > --- /dev/null > +++ b/tools/perf/Documentation/perf-iiostat.txt > @@ -0,0 +1,89 @@ > +perf-iiostat(1) > +=============== > + > +NAME > +---- > +perf-iiostat - Show I/O performance metrics > + > +SYNOPSIS > +-------- > +[verse] > +'perf iiostat' show > +'perf iiostat' <ports> -- <command> [<options>] > + > +DESCRIPTION > +----------- > +Mode is intended to provide four I/O performance metrics per each IIO > +stack (PCIe root port): > + > +- Inbound Read - I/O devices below IIO stack read from the host memory, in > MB > + > +- Inbound Write - I/O devices below IIO stack write to the host memory, in > MB > + > +- Outbound Read - CPU reads from I/O devices below IIO stack, in MB > + > +- Outbound Write - CPU writes to I/O devices below IIO stack, in MB > + > +OPTIONS > +------- > +<command>...:: > + Any command you can specify in a shell. > + > +show:: > + List all IIO stacks. I'd prefer 'list' for this, but not a strong opinion.. > + > +<ports>:: > + Select the root ports for monitoring. Comma-separated list is > supported. > + > +EXAMPLES > +-------- > + > +1. List all IIO stacks (example for 2-S platform): > + > + $ perf iiostat show > + S0-uncore_iio_0<0000:00> > + S1-uncore_iio_0<0000:80> > + S0-uncore_iio_1<0000:17> > + S1-uncore_iio_1<0000:85> > + S0-uncore_iio_2<0000:3a> > + S1-uncore_iio_2<0000:ae> > + S0-uncore_iio_3<0000:5d> > + S1-uncore_iio_3<0000:d7> > + > +2. Collect metrics for all I/O stacks: > + > + $ perf iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct > + 357708+0 records in > + 357707+0 records out > + 375083606016 bytes (375 GB, 349 GiB) copied, 215.974 s, 1.7 GB/s > + > + Performance counter stats for 'system wide': > + > + port Inbound Read(MB) Inbound Write(MB) Outbound > Read(MB) Outbound Write(MB) > + 0000:00 1 0 2 > 3 > + 0000:80 0 0 0 > 0 > + 0000:17 352552 43 0 > 21 > + 0000:85 0 0 0 > 0 > + 0000:3a 3 0 0 > 0 > + 0000:ae 0 0 0 > 0 > + 0000:5d 0 0 0 > 0 > + 0000:d7 0 0 0 > 0 > + > +3. Collect metrics for comma-separated list of I/O stacks: > + > + $ perf iiostat 0000:17,0:3a -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M > oflag=direct > + 357708+0 records in > + 357707+0 records out > + 375083606016 bytes (375 GB, 349 GiB) copied, 197.08 s, 1.9 GB/s > + > + Performance counter stats for 'system wide': > + > + port Inbound Read(MB) Inbound Write(MB) Outbound > Read(MB) Outbound Write(MB) > + 0000:17 358559 44 0 > 22 > + 0000:3a 3 2 0 > 0 > + > + 197.081983474 seconds time elapsed > + > +SEE ALSO > +-------- > +linkperf:perf-stat[1] > \ No newline at end of file [SNIP] > diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh > new file mode 100644 > index 000000000000..2c5168d2550b > --- /dev/null > +++ b/tools/perf/perf-iiostat.sh > @@ -0,0 +1,12 @@ > +#!/bin/bash > +# SPDX-License-Identifier: GPL-2.0 > +# perf iiostat > +# Alexander Antonov <[email protected]> > + > +if [[ "$1" == "show" ]] || [[ "$1" =~ > ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then > + DELIMITER="=" > +else > + DELIMITER=" " > +fi > + > +perf stat --iiostat$DELIMITER$* Why is this needed? Thanks, Namhyung > \ No newline at end of file > -- > 2.19.1 >
