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Date: Mon, 3 Jan 2022 11:53:59 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Claire Jensen <cjense@...gle.com>, Jiri Olsa <jolsa@...hat.com>
Cc: peterz@...radead.org, mingo@...hat.com, mark.rutland@....com,
alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
yao.jin@...ux.intel.com, song@...nel.org, andi@...stfloor.org,
adrian.hunter@...el.com, kan.liang@...ux.intel.com,
james.clark@....com, alexander.antonov@...ux.intel.com,
changbin.du@...el.com, liuqi115@...wei.com, irogers@...gle.com,
eranian@...gle.com, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, clairej735@...il.com
Subject: Re: [PATCH v2 1/1] Add field checking tests for perf stat JSON
output.
Em Tue, Aug 31, 2021 at 09:46:10PM +0200, Jiri Olsa escreveu:
> On Fri, Aug 13, 2021 at 10:09:37PM +0000, Claire Jensen wrote:
> > Counts number of fields to make sure expected fields are present.
> >
> > Signed-off-by: Claire Jensen <cjense@...gle.com>
> > ---
> > .../tests/shell/lib/perf_json_output_lint.py | 48 ++++++++
> > tools/perf/tests/shell/stat+json_output.sh | 114 ++++++++++++++++++
> > 2 files changed, 162 insertions(+)
> > create mode 100644 tools/perf/tests/shell/lib/perf_json_output_lint.py
> > create mode 100644 tools/perf/tests/shell/stat+json_output.sh
>
> this one needs to have exec priv, right?
>
> >
> > diff --git a/tools/perf/tests/shell/lib/perf_json_output_lint.py b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> > new file mode 100644
> > index 000000000000..45d9163e7423
> > --- /dev/null
>
> SNIP
>
> > diff --git a/tools/perf/tests/shell/stat+json_output.sh b/tools/perf/tests/shell/stat+json_output.sh
> > new file mode 100644
> > index 000000000000..8a772badae45
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/stat+json_output.sh
> > @@ -0,0 +1,114 @@
> > +#!/bin/bash
> > +# perf stat JSON output linter
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Checks various perf stat JSON output commands for the
> > +# correct number of fields.
> > +
> > +set -e
> > +set -x
> > +
> > +pythonchecker=$(dirname $0)/lib/perf_json_output_lint.py
> > +file="/proc/sys/kernel/perf_event_paranoid"
> > +paranoia=$(cat "$file" | grep -o -E '[0-9]+')
> > +
> > +check_no_args()
> > +{
> > + perf stat -j sleep 1 2>&1 | \
>
> hum, is this based on some other change? I don't see -j option in perf stat
Yeah, testing it I stumbled in both problems as reported by Jiri:
⬢[acme@...lbox perf]$ perf test -v linter
Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc
87: perf stat JSON output linter :
--- start ---
test child forked, pid 1826327
sh: line 1: ./tools/perf/tests/shell/stat+json_output.sh: Permission denied
test child finished with -1
---- end ----
perf stat JSON output linter: FAILED!
⬢[acme@...lbox perf]$
⬢[acme@...lbox perf]$ ls -la tools/perf/tests/shell/stat+json_output.sh
-rw-r--r--. 1 acme acme 2113 Jan 3 11:51 tools/perf/tests/shell/stat+json_output.sh
⬢[acme@...lbox perf]$ chmod +x tools/perf/tests/shell/stat+json_output.sh
⬢[acme@...lbox perf]$ perf test -v linter
Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc
87: perf stat JSON output linter :
--- start ---
test child forked, pid 1826350
++ dirname ./tools/perf/tests/shell/stat+json_output.sh
+ pythonchecker=./tools/perf/tests/shell/lib/perf_json_output_lint.py
+ file=/proc/sys/kernel/perf_event_paranoid
++ cat /proc/sys/kernel/perf_event_paranoid
++ grep -o -E '[0-9]+'
+ paranoia=2
+ '[' 2 -gt 0 ']'
+ echo check_all_cpus test skipped because of paranoia level.
check_all_cpus test skipped because of paranoia level.
+ '[' 2 -gt 0 ']'
+ echo check_all_cpus test skipped because of paranoia level.
check_all_cpus test skipped because of paranoia level.
+ '[' 2 -gt 0 ']'
+ echo check_all_cpus test skipped because of paranoia level.
check_all_cpus test skipped because of paranoia level.
+ '[' 2 -gt 0 ']'
+ echo check_per_die test skipped because of paranoia level.
check_per_die test skipped because of paranoia level.
+ '[' 2 -gt 0 ']'
+ echo check_per_node test skipped because of paranoia level.
check_per_node test skipped because of paranoia level.
+ '[' 2 -gt 0 ']'
+ echo check_per_socket test skipped because of paranoia level.
check_per_socket test skipped because of paranoia level.
+ check_no_args
+ perf stat -j sleep 1
+ python ./tools/perf/tests/shell/lib/perf_json_output_lint.py --no-args
Error: unknown switch `j'
Usage: perf stat [<options>] [<command>]
-a, --all-cpus system-wide collection from all CPUs
-A, --no-aggr disable CPU count aggregation
-B, --big-num print large numbers with thousands' separators
-b, --bpf-prog <bpf-prog-id>
stat events on existing bpf program id
-C, --cpu <cpu> list of cpus to monitor in system-wide
-D, --delay <n> ms to wait before starting measurement after program start (-1: start with events disabled)
-d, --detailed detailed run - start a lot of events
-e, --event <event> event selector. use 'perf list' to list available events
-G, --cgroup <name> monitor event in cgroup name only
-g, --group put the counters into a counter group
-I, --interval-print <n>
print counts at regular interval in ms (overhead is possible for values <= 100ms)
-i, --no-inherit child tasks do not inherit counters
-M, --metrics <metric/metric group list>
monitor specified metrics or metric groups (separated by ,)
-n, --null null run - dont start any counters
-o, --output <file> output file name
-p, --pid <pid> stat events on existing process id
-r, --repeat <n> repeat command and print average + stddev (max: 100, forever: 0)
-S, --sync call sync() before starting a run
-t, --tid <tid> stat events on existing thread id
-T, --transaction hardware transaction statistics
-v, --verbose be more verbose (show counter open errors, etc)
-x, --field-separator <separator>
print counts with custom separator
--all-kernel Configure all used events to run in kernel space.
--all-user Configure all used events to run in user space.
--append append to the output file
--bpf-attr-map <attr-map-path>
path to perf_event_attr map
--bpf-counters use bpf program to count events
--control <fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]>
Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).
Optionally send control command completion ('ack\n') to ack-fd descriptor.
Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.
--filter <filter>
event filter
--for-each-cgroup <name>
expand events for each cgroup
--interval-clear clear screen in between new interval
--interval-count <n>
print counts for fixed number of times
--iostat[=<default>]
measure I/O performance metrics provided by arch/platform
--log-fd <n> log output to fd, instead of stderr
--metric-no-group
don't group metric events, impacts multiplexing
--metric-no-merge
don't try to share events between metrics in a group
--metric-only Only print computed metrics. No raw values
--no-csv-summary don't print 'summary' for CSV summary output
--no-merge Do not merge identical named events
--per-core aggregate counts per physical processor core
--per-die aggregate counts per processor die
--per-node aggregate counts per numa node
--per-socket aggregate counts per processor socket
--per-thread aggregate counts per thread
--percore-show-thread
Use with 'percore' event qualifier to show the event counts of one hardware thread by sum up total hardware threads of same physical core
--post <command> command to run after to the measured command
--pre <command> command to run prior to the measured command
--quiet don't print output (useful with record)
--scale Use --no-scale to disable counter scaling for multiplexing
--smi-cost measure SMI cost
--summary print summary for interval mode
--table display details about each run (only with -r option)
--td-level <n> Set the metrics level for the top-down statistics (0: max level)
--timeout <n> stop workload and print counts after a timeout period in ms (>= 10ms)
--topdown measure top-down statistics
Test failed for input:
Error: unknown switch `j'
Usage: perf stat [<options>] [<command>]
-a, --all-cpus system-wide collection from all CPUs
-A, --no-aggr disable CPU count aggregation
-B, --big-num print large numbers with thousands' separators
-b, --bpf-prog <bpf-prog-id>
stat events on existing bpf program id
-C, --cpu <cpu> list of cpus to monitor in system-wide
-D, --delay <n> ms to wait before starting measurement after program start (-1: start with events disabled)
-d, --detailed detailed run - start a lot of events
-e, --event <event> event selector. use 'perf list' to list available events
-G, --cgroup <name> monitor event in cgroup name only
-g, --group put the counters into a counter group
-I, --interval-print <n>
print counts at regular interval in ms (overhead is possible for values <= 100ms)
-i, --no-inherit child tasks do not inherit counters
-M, --metrics <metric/metric group list>
monitor specified metrics or metric groups (separated by ,)
-n, --null null run - dont start any counters
-o, --output <file> output file name
-p, --pid <pid> stat events on existing process id
-r, --repeat <n> repeat command and print average + stddev (max: 100, forever: 0)
-S, --sync call sync() before starting a run
-t, --tid <tid> stat events on existing thread id
-T, --transaction hardware transaction statistics
-v, --verbose be more verbose (show counter open errors, etc)
-x, --field-separator <separator>
print counts with custom separator
--all-kernel Configure all used events to run in kernel space.
--all-user Configure all used events to run in user space.
--append append to the output file
--bpf-attr-map <attr-map-path>
path to perf_event_attr map
--bpf-counters use bpf program to count events
--control <fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]>
Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).
Optionally send control command completion ('ack\n') to ack-fd descriptor.
Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.
--filter <filter>
event filter
--for-each-cgroup <name>
expand events for each cgroup
--interval-clear clear screen in between new interval
--interval-count <n>
print counts for fixed number of times
--iostat[=<default>]
measure I/O performance metrics provided by arch/platform
--log-fd <n> log output to fd, instead of stderr
--metric-no-group
don't group metric events, impacts multiplexing
--metric-no-merge
don't try to share events between metrics in a group
--metric-only Only print computed metrics. No raw values
--no-csv-summary don't print 'summary' for CSV summary output
--no-merge Do not merge identical named events
--per-core aggregate counts per physical processor core
--per-die aggregate counts per processor die
--per-node aggregate counts per numa node
--per-socket aggregate counts per processor socket
--per-thread aggregate counts per thread
--percore-show-thread
Use with 'percore' event qualifier to show the event counts of one hardware thread by sum up total hardware threads of same physical core
--post <command> command to run after to the measured command
--pre <command> command to run prior to the measured command
--quiet don't print output (useful with record)
--scale Use --no-scale to disable counter scaling for multiplexing
--smi-cost measure SMI cost
--summary print summary for interval mode
--table display details about each run (only with -r option)
--td-level <n> Set the metrics level for the top-down statistics (0: max level)
--timeout <n> stop workload and print counts after a timeout period in ms (>= 10ms)
--topdown measure top-down statistics
Traceback (most recent call last):
File "/var/home/acme/git/perf/./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 40, in <module>
check_json_output(6)
File "/var/home/acme/git/perf/./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 34, in check_json_output
raise RuntimeError('wrong number of fields. counted {0}'
RuntimeError: wrong number of fields. counted 0 expected 6 in Error: unknown switch `j'
test child finished with -1
---- end ----
perf stat JSON output linter: FAILED!
⬢[acme@...lbox perf]$
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