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Date: Tue, 4 Jan 2022 15:21:27 +0100
From: Jiri Olsa <jolsa@...hat.com>
To: Ian Rogers <irogers@...gle.com>
Cc: Andi Kleen <ak@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
John Garry <john.garry@...wei.com>,
Kajol Jain <kjain@...ux.ibm.com>,
"Paul A . Clarke" <pc@...ibm.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Riccardo Mancini <rickyman7@...il.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
Vineet Singh <vineet.singh@...el.com>,
James Clark <james.clark@....com>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>, coresight@...ts.linaro.org,
linux-arm-kernel@...ts.infradead.org, zhengjun.xing@...el.com,
eranian@...gle.com
Subject: Re: [PATCH v3] perf evlist: Remove group option.
On Wed, Dec 29, 2021 at 11:19:43PM -0800, Ian Rogers wrote:
> The group option predates grouping events using curly braces added in
> commit 89efb029502d ("perf tools: Add support to parse event group syntax")
> The --group option was retained for legacy support (in August 2012) but
> keeping it adds complexity.
>
> v2 and v3. were rebases.
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
it should not be part of this patchset right?
I see it was posted separately
jirka
> ---
> tools/perf/Documentation/perf-record.txt | 4 ----
> tools/perf/Documentation/perf-top.txt | 7 ++-----
> tools/perf/builtin-record.c | 2 --
> tools/perf/builtin-stat.c | 6 ------
> tools/perf/builtin-top.c | 2 --
> tools/perf/tests/attr/README | 2 --
> tools/perf/tests/attr/test-record-group | 22 ----------------------
> tools/perf/tests/attr/test-stat-group | 17 -----------------
> tools/perf/util/evlist.c | 2 +-
> tools/perf/util/evlist.h | 2 --
> tools/perf/util/python.c | 8 --------
> tools/perf/util/record.c | 7 -------
> tools/perf/util/record.h | 1 -
> 13 files changed, 3 insertions(+), 79 deletions(-)
> delete mode 100644 tools/perf/tests/attr/test-record-group
> delete mode 100644 tools/perf/tests/attr/test-stat-group
>
> diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
> index 55df7b073a55..960fb1ad3f27 100644
> --- a/tools/perf/Documentation/perf-record.txt
> +++ b/tools/perf/Documentation/perf-record.txt
> @@ -238,10 +238,6 @@ OPTIONS
> Also, by adding a comma, the number of mmap pages for AUX
> area tracing can be specified.
>
> ---group::
> - Put all events in a single event group. This precedes the --event
> - option and remains only for backward compatibility. See --event.
> -
> -g::
> Enables call-graph (stack chain/backtrace) recording for both
> kernel space and user space.
> diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
> index cac3dfbee7d8..acbafe777e52 100644
> --- a/tools/perf/Documentation/perf-top.txt
> +++ b/tools/perf/Documentation/perf-top.txt
> @@ -51,9 +51,6 @@ Default is to monitor all CPUS.
> --count-filter=<count>::
> Only display functions with more events than this.
>
> ---group::
> - Put the counters into a counter group.
> -
> --group-sort-idx::
> Sort the output by the event at the index n in group. If n is invalid,
> sort by the first event. It can support multiple groups with different
> @@ -313,10 +310,10 @@ use '-e e1 -e e2 -G foo,foo' or just use '-e e1 -e e2 -G foo'.
>
> perf top -e cycles,probe:icmp_rcv --switch-on=probe:icmp_rcv
>
> - Alternatively one can ask for --group and then two overhead columns
> + Alternatively one can ask for a group and then two overhead columns
> will appear, the first for cycles and the second for the switch-on event.
>
> - perf top --group -e cycles,probe:icmp_rcv --switch-on=probe:icmp_rcv
> + perf top -e '{cycles,probe:icmp_rcv}' --switch-on=probe:icmp_rcv
>
> This may be interesting to measure a workload only after some initialization
> phase is over, i.e. insert a perf probe at that point and use the above
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index 6ac2160913ea..54eff61f78eb 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -2521,8 +2521,6 @@ static struct option __record_options[] = {
> OPT_CALLBACK(0, "mmap-flush", &record.opts, "number",
> "Minimal number of bytes that is extracted from mmap data pages (default: 1)",
> record__mmap_flush_parse),
> - OPT_BOOLEAN(0, "group", &record.opts.group,
> - "put the counters into a counter group"),
> OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
> NULL, "enables call-graph recording" ,
> &record_callchain_opt),
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index f6ca2b054c5b..8ce4ca6111ae 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -180,7 +180,6 @@ static bool topdown_run = false;
> static bool smi_cost = false;
> static bool smi_reset = false;
> static int big_num_opt = -1;
> -static bool group = false;
> static const char *pre_cmd = NULL;
> static const char *post_cmd = NULL;
> static bool sync_run = false;
> @@ -800,9 +799,6 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
> child_pid = evsel_list->workload.pid;
> }
>
> - if (group)
> - evlist__set_leader(evsel_list);
> -
> if (affinity__setup(&affinity) < 0)
> return -1;
>
> @@ -1212,8 +1208,6 @@ static struct option stat_options[] = {
> #endif
> OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
> "system-wide collection from all CPUs"),
> - OPT_BOOLEAN('g', "group", &group,
> - "put the counters into a counter group"),
> OPT_BOOLEAN(0, "scale", &stat_config.scale,
> "Use --no-scale to disable counter scaling for multiplexing"),
> OPT_INCR('v', "verbose", &verbose,
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index 1fc390f136dd..0d8441942f34 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -1472,8 +1472,6 @@ int cmd_top(int argc, const char **argv)
> "dump the symbol table used for profiling"),
> OPT_INTEGER('f', "count-filter", &top.count_filter,
> "only display functions with more events than this"),
> - OPT_BOOLEAN(0, "group", &opts->group,
> - "put the counters into a counter group"),
> OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
> "child tasks do not inherit counters"),
> OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
> diff --git a/tools/perf/tests/attr/README b/tools/perf/tests/attr/README
> index a36f49fb4dbe..f538272af57b 100644
> --- a/tools/perf/tests/attr/README
> +++ b/tools/perf/tests/attr/README
> @@ -47,7 +47,6 @@ Following tests are defined (with perf commands):
> perf record -g kill (test-record-graph-default)
> perf record --call-graph dwarf kill (test-record-graph-dwarf)
> perf record --call-graph fp kill (test-record-graph-fp)
> - perf record --group -e cycles,instructions kill (test-record-group)
> perf record -e '{cycles,instructions}' kill (test-record-group1)
> perf record -e '{cycles/period=1/,instructions/period=2/}:S' kill (test-record-group2)
> perf record -D kill (test-record-no-delay)
> @@ -61,6 +60,5 @@ Following tests are defined (with perf commands):
> perf stat -d kill (test-stat-detailed-1)
> perf stat -dd kill (test-stat-detailed-2)
> perf stat -ddd kill (test-stat-detailed-3)
> - perf stat --group -e cycles,instructions kill (test-stat-group)
> perf stat -e '{cycles,instructions}' kill (test-stat-group1)
> perf stat -i -e cycles kill (test-stat-no-inherit)
> diff --git a/tools/perf/tests/attr/test-record-group b/tools/perf/tests/attr/test-record-group
> deleted file mode 100644
> index 14ee60fd3f41..000000000000
> --- a/tools/perf/tests/attr/test-record-group
> +++ /dev/null
> @@ -1,22 +0,0 @@
> -[config]
> -command = record
> -args = --no-bpf-event --group -e cycles,instructions kill >/dev/null 2>&1
> -ret = 1
> -
> -[event-1:base-record]
> -fd=1
> -group_fd=-1
> -sample_type=327
> -read_format=4
> -
> -[event-2:base-record]
> -fd=2
> -group_fd=1
> -config=1
> -sample_type=327
> -read_format=4
> -mmap=0
> -comm=0
> -task=0
> -enable_on_exec=0
> -disabled=0
> diff --git a/tools/perf/tests/attr/test-stat-group b/tools/perf/tests/attr/test-stat-group
> deleted file mode 100644
> index e15d6946e9b3..000000000000
> --- a/tools/perf/tests/attr/test-stat-group
> +++ /dev/null
> @@ -1,17 +0,0 @@
> -[config]
> -command = stat
> -args = --group -e cycles,instructions kill >/dev/null 2>&1
> -ret = 1
> -
> -[event-1:base-stat]
> -fd=1
> -group_fd=-1
> -read_format=3|15
> -
> -[event-2:base-stat]
> -fd=2
> -group_fd=1
> -config=1
> -disabled=0
> -enable_on_exec=0
> -read_format=3|15
> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> index 5f92319ce258..2e11d82d15e0 100644
> --- a/tools/perf/util/evlist.c
> +++ b/tools/perf/util/evlist.c
> @@ -224,7 +224,7 @@ int __evlist__set_tracepoints_handlers(struct evlist *evlist,
> return err;
> }
>
> -void evlist__set_leader(struct evlist *evlist)
> +static void evlist__set_leader(struct evlist *evlist)
> {
> perf_evlist__set_leader(&evlist->core);
> }
> diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
> index 27594900a052..ebab48a8120f 100644
> --- a/tools/perf/util/evlist.h
> +++ b/tools/perf/util/evlist.h
> @@ -203,8 +203,6 @@ void evlist__set_selected(struct evlist *evlist, struct evsel *evsel);
> int evlist__create_maps(struct evlist *evlist, struct target *target);
> int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel);
>
> -void evlist__set_leader(struct evlist *evlist);
> -
> u64 __evlist__combined_sample_type(struct evlist *evlist);
> u64 evlist__combined_sample_type(struct evlist *evlist);
> u64 evlist__combined_branch_type(struct evlist *evlist);
> diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> index 7f782a31bda3..d063375c346a 100644
> --- a/tools/perf/util/python.c
> +++ b/tools/perf/util/python.c
> @@ -1121,14 +1121,6 @@ static PyObject *pyrf_evlist__open(struct pyrf_evlist *pevlist,
> PyObject *args, PyObject *kwargs)
> {
> struct evlist *evlist = &pevlist->evlist;
> - int group = 0;
> - static char *kwlist[] = { "group", NULL };
> -
> - if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OOii", kwlist, &group))
> - return NULL;
> -
> - if (group)
> - evlist__set_leader(evlist);
>
> if (evlist__open(evlist) < 0) {
> PyErr_SetFromErrno(PyExc_OSError);
> diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
> index bff669b615ee..9e694db7c7ee 100644
> --- a/tools/perf/util/record.c
> +++ b/tools/perf/util/record.c
> @@ -99,13 +99,6 @@ void evlist__config(struct evlist *evlist, struct record_opts *opts, struct call
> bool use_comm_exec;
> bool sample_id = opts->sample_id;
>
> - /*
> - * Set the evsel leader links before we configure attributes,
> - * since some might depend on this info.
> - */
> - if (opts->group)
> - evlist__set_leader(evlist);
> -
> if (evlist->core.cpus->map[0] < 0)
> opts->no_inherit = true;
>
> diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h
> index ef6c2715fdd9..0a7a8dbbea9c 100644
> --- a/tools/perf/util/record.h
> +++ b/tools/perf/util/record.h
> @@ -13,7 +13,6 @@ struct option;
>
> struct record_opts {
> struct target target;
> - bool group;
> bool inherit_stat;
> bool no_buffering;
> bool no_inherit;
> --
> 2.34.1.307.g9b7440fafd-goog
>
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