From nobody Mon Feb 9 13:01:03 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9D9F62566F3; Fri, 7 Mar 2025 20:24:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741379068; cv=none; b=F4Bi1kKhWnk+RsFxNeCVEJIKAFuh813vrB5+YuM42gMW66p+kO8nTmxhwond/oLe6Ykjv9mnhF5VSsopiJ2dcOftTFPXL2nhdPksglo38Uuuf2s+ukLbj0Hn6FOfVBpvIyKcDe2CDWXNIMtRaMqlQblfcvheAvRpwTuQxc9jITk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741379068; c=relaxed/simple; bh=wXhtqRImAeI9+wSALGVW4AqJFGuGVZkkDueaeNoVb44=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VX/qARRpPy20CcQht/0NsD+2GSE/OgNQ4LDAjhtlc75i3UDaYEj6mUfKWRYh19YUG4tbymQczNbCPuaVnLG7n/ot5dTojzVcPRNsd/BaiQZgwi2S7qQGjtUxJSHhoInlF0Z3EHBelA989gjHQBxFME1K+3i9w4n5XXMd6YiO6Zc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 76D8122EA; Fri, 7 Mar 2025 12:24:38 -0800 (PST) Received: from e128066.arm.com (unknown [10.57.40.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7F51C3F5A1; Fri, 7 Mar 2025 12:24:22 -0800 (PST) From: mark.barnett@arm.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, irogers@google.com Cc: ben.gainey@arm.com, deepak.surti@arm.com, ak@linux.intel.com, will@kernel.org, james.clark@arm.com, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mark Barnett Subject: [PATCH v3 4/5] tools/perf: Modify event parser to support alt-period term Date: Fri, 7 Mar 2025 20:22:46 +0000 Message-Id: <20250307202247.648633-5-mark.barnett@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250307202247.648633-1-mark.barnett@arm.com> References: <20250307202247.648633-1-mark.barnett@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ben Gainey parse-events is modified, adding the "alt-period" term which can be used to specify the alternative sampling period. Signed-off-by: Ben Gainey Signed-off-by: Mark Barnett --- tools/include/uapi/linux/perf_event.h | 3 +++ tools/perf/tests/shell/attr/base-record | 3 ++- tools/perf/tests/shell/attr/base-record-spe | 1 + tools/perf/tests/shell/attr/base-stat | 3 ++- tools/perf/tests/shell/attr/system-wide-dummy | 3 ++- .../tests/shell/attr/test-record-alt-period-term | 12 ++++++++++++ tools/perf/tests/shell/attr/test-record-dummy-C0 | 3 ++- tools/perf/tests/shell/lib/attr.py | 1 + tools/perf/util/evsel.c | 1 + tools/perf/util/parse-events.c | 15 +++++++++++++++ tools/perf/util/parse-events.h | 3 ++- tools/perf/util/parse-events.l | 1 + tools/perf/util/perf_event_attr_fprintf.c | 1 + tools/perf/util/pmu.c | 1 + 14 files changed, 46 insertions(+), 5 deletions(-) create mode 100644 tools/perf/tests/shell/attr/test-record-alt-period-term diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/lin= ux/perf_event.h index 0524d541d4e3..499a8673df8e 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -379,6 +379,7 @@ enum perf_event_read_format { #define PERF_ATTR_SIZE_VER6 120 /* add: aux_sample_size */ #define PERF_ATTR_SIZE_VER7 128 /* add: sig_data */ #define PERF_ATTR_SIZE_VER8 136 /* add: config3 */ +#define PERF_ATTR_SIZE_VER9 144 /* add: alt_sample_period */ =20 /* * Hardware event_id to monitor via a performance monitoring event: @@ -531,6 +532,8 @@ struct perf_event_attr { __u64 sig_data; =20 __u64 config3; /* extension of config2 */ + + __u64 alt_sample_period; }; =20 /* diff --git a/tools/perf/tests/shell/attr/base-record b/tools/perf/tests/she= ll/attr/base-record index b44e4e6e4443..28a7233f7bc1 100644 --- a/tools/perf/tests/shell/attr/base-record +++ b/tools/perf/tests/shell/attr/base-record @@ -5,7 +5,7 @@ group_fd=3D-1 flags=3D0|8 cpu=3D* type=3D0|1 -size=3D136 +size=3D144 config=3D0|1 sample_period=3D* sample_type=3D263 @@ -39,3 +39,4 @@ config2=3D0 branch_sample_type=3D0 sample_regs_user=3D0 sample_stack_user=3D0 +alt_sample_period=3D0 diff --git a/tools/perf/tests/shell/attr/base-record-spe b/tools/perf/tests= /shell/attr/base-record-spe index 08fa96b59240..ad8eb72e655a 100644 --- a/tools/perf/tests/shell/attr/base-record-spe +++ b/tools/perf/tests/shell/attr/base-record-spe @@ -38,3 +38,4 @@ config2=3D* branch_sample_type=3D* sample_regs_user=3D* sample_stack_user=3D* +alt_sample_period=3D0 diff --git a/tools/perf/tests/shell/attr/base-stat b/tools/perf/tests/shell= /attr/base-stat index fccd8ec4d1b0..2de92c5c300d 100644 --- a/tools/perf/tests/shell/attr/base-stat +++ b/tools/perf/tests/shell/attr/base-stat @@ -5,7 +5,7 @@ group_fd=3D-1 flags=3D0|8 cpu=3D* type=3D0 -size=3D136 +size=3D144 config=3D0 sample_period=3D0 sample_type=3D65536 @@ -39,3 +39,4 @@ config2=3D0 branch_sample_type=3D0 sample_regs_user=3D0 sample_stack_user=3D0 +alt_sample_period=3D0 diff --git a/tools/perf/tests/shell/attr/system-wide-dummy b/tools/perf/tes= ts/shell/attr/system-wide-dummy index a1e1d6a263bf..c0a17bb3c022 100644 --- a/tools/perf/tests/shell/attr/system-wide-dummy +++ b/tools/perf/tests/shell/attr/system-wide-dummy @@ -7,7 +7,7 @@ cpu=3D* pid=3D-1 flags=3D8 type=3D1 -size=3D136 +size=3D144 config=3D9 sample_period=3D1 # PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | @@ -50,3 +50,4 @@ config2=3D0 branch_sample_type=3D0 sample_regs_user=3D0 sample_stack_user=3D0 +alt_sample_period=3D0 diff --git a/tools/perf/tests/shell/attr/test-record-alt-period-term b/tool= s/perf/tests/shell/attr/test-record-alt-period-term new file mode 100644 index 000000000000..fcdb790adcd3 --- /dev/null +++ b/tools/perf/tests/shell/attr/test-record-alt-period-term @@ -0,0 +1,12 @@ +[config] +command =3D record +args =3D --no-bpf-event -e cycles/period=3D3,alt-period=3D2/ -- kill >/= dev/null 2>&1 +ret =3D 1 +kernel_since =3D 6.11 + +[event-10:base-record] +sample_period=3D3 +alt_sample_period=3D2 + +freq=3D0 +sample_type=3D7 diff --git a/tools/perf/tests/shell/attr/test-record-dummy-C0 b/tools/perf/= tests/shell/attr/test-record-dummy-C0 index 91499405fff4..e6315918a95e 100644 --- a/tools/perf/tests/shell/attr/test-record-dummy-C0 +++ b/tools/perf/tests/shell/attr/test-record-dummy-C0 @@ -10,7 +10,7 @@ cpu=3D0 pid=3D-1 flags=3D8 type=3D1 -size=3D136 +size=3D144 config=3D9 sample_period=3D4000 # PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | @@ -53,3 +53,4 @@ config2=3D0 branch_sample_type=3D0 sample_regs_user=3D0 sample_stack_user=3D0 +alt_sample_period=3D0 diff --git a/tools/perf/tests/shell/lib/attr.py b/tools/perf/tests/shell/li= b/attr.py index 3db9a7d78715..04e95f76005a 100644 --- a/tools/perf/tests/shell/lib/attr.py +++ b/tools/perf/tests/shell/lib/attr.py @@ -91,6 +91,7 @@ class Event(dict): 'branch_sample_type', 'sample_regs_user', 'sample_stack_user', + 'alt_sample_period', ] =20 def add(self, data): diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 4a0ef095db92..0657e580ea13 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -180,6 +180,7 @@ static int store_event(struct perf_event_attr *attr, pi= d_t pid, struct perf_cpu WRITE_ASS(branch_sample_type, "llu"); WRITE_ASS(sample_regs_user, "llu"); WRITE_ASS(sample_stack_user, PRIu32); + WRITE_ASS(alt_sample_period, "llu"); =20 fclose(file); return 0; diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 35e48fe56dfa..653d84080bc7 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -805,6 +805,7 @@ const char *parse_events__term_type_str(enum parse_even= ts__term_type term_type) [PARSE_EVENTS__TERM_TYPE_RAW] =3D "raw", [PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE] =3D "legacy-cache", [PARSE_EVENTS__TERM_TYPE_HARDWARE] =3D "hardware", + [PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD] =3D "alt-period", }; if ((unsigned int)term_type >=3D __PARSE_EVENTS__TERM_TYPE_NR) return "unknown term"; @@ -833,6 +834,7 @@ config_term_avail(enum parse_events__term_type term_typ= e, struct parse_events_er case PARSE_EVENTS__TERM_TYPE_NAME: case PARSE_EVENTS__TERM_TYPE_METRIC_ID: case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: + case PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD: case PARSE_EVENTS__TERM_TYPE_PERCORE: return true; case PARSE_EVENTS__TERM_TYPE_USER: @@ -981,6 +983,16 @@ do { \ return -EINVAL; } break; + case PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD: + CHECK_TYPE_VAL(NUM); + if (term->val.num =3D=3D 0) { + parse_events_error__handle(err, term->err_val, + strdup("expected a non-zero value"), + NULL); + return -EINVAL; + } + attr->alt_sample_period =3D term->val.num; + break; case PARSE_EVENTS__TERM_TYPE_DRV_CFG: case PARSE_EVENTS__TERM_TYPE_USER: case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE: @@ -1108,6 +1120,7 @@ static int config_term_tracepoint(struct perf_event_a= ttr *attr, case PARSE_EVENTS__TERM_TYPE_RAW: case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE: case PARSE_EVENTS__TERM_TYPE_HARDWARE: + case PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD: default: if (err) { parse_events_error__handle(err, term->err_term, @@ -1242,6 +1255,7 @@ do { \ case PARSE_EVENTS__TERM_TYPE_RAW: case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE: case PARSE_EVENTS__TERM_TYPE_HARDWARE: + case PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD: default: break; } @@ -1296,6 +1310,7 @@ static int get_config_chgs(struct perf_pmu *pmu, stru= ct parse_events_terms *head case PARSE_EVENTS__TERM_TYPE_RAW: case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE: case PARSE_EVENTS__TERM_TYPE_HARDWARE: + case PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD: default: break; } diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index e176a34ab088..d00bb6c5d9ab 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -80,7 +80,8 @@ enum parse_events__term_type { PARSE_EVENTS__TERM_TYPE_RAW, PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE, PARSE_EVENTS__TERM_TYPE_HARDWARE, -#define __PARSE_EVENTS__TERM_TYPE_NR (PARSE_EVENTS__TERM_TYPE_HARDWARE + 1) + PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PERIOD, +#define __PARSE_EVENTS__TERM_TYPE_NR (PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_P= ERIOD + 1) }; =20 struct parse_events_term { diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index 7ed86e3e34e3..9c64434167b7 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -335,6 +335,7 @@ aux-output { return term(yyscanner, PARSE_EVENTS__TERM= _TYPE_AUX_OUTPUT); } aux-action { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_ACTION); } aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMP= LE_SIZE); } metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); } +alt-period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_ALT_SAMPLE_PE= RIOD); } cpu-cycles|cycles { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES)= ; } stalled-cycles-frontend|idle-cycles-frontend { return hw_term(yyscanner, P= ERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } stalled-cycles-backend|idle-cycles-backend { return hw_term(yyscanner, PER= F_COUNT_HW_STALLED_CYCLES_BACKEND); } diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/pe= rf_event_attr_fprintf.c index c7f3543b9921..e823240b7dd8 100644 --- a/tools/perf/util/perf_event_attr_fprintf.c +++ b/tools/perf/util/perf_event_attr_fprintf.c @@ -334,6 +334,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_even= t_attr *attr, PRINT_ATTRf(aux_start_paused, p_unsigned); PRINT_ATTRf(aux_pause, p_unsigned); PRINT_ATTRf(aux_resume, p_unsigned); + PRINT_ATTRf(alt_sample_period, p_unsigned); =20 return ret; } diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 57450c73fb63..7576fe35a869 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1804,6 +1804,7 @@ int perf_pmu__for_each_format(struct perf_pmu *pmu, v= oid *state, pmu_format_call "aux-output", "aux-action=3D(pause|resume|start-paused)", "aux-sample-size=3Dnumber", + "alt-period=3Dnumber", }; struct perf_pmu_format *format; int ret; --=20 2.43.0