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Thu, 28 Nov 2024 05:37:03 -0800 (PST) From: Yang Jihong To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com, james.clark@arm.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: yangjihong@bytedance.com Subject: [RFC 09/12] perf event action: Add parsing builtin pid expr support Date: Thu, 28 Nov 2024 21:35:50 +0800 Message-Id: <20241128133553.823722-10-yangjihong@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241128133553.823722-1-yangjihong@bytedance.com> References: <20241128133553.823722-1-yangjihong@bytedance.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" Support parsing of builtin pid expression. Testcase: # perf record -e sched:sched_switch --action 'print("pid =3D %d\n", pid)' pid =3D 132784 pid =3D 0 pid =3D 132784 pid =3D 132778 pid =3D 0 pid =3D 0 pid =3D 132784 pid =3D 0 pid =3D 132784 pid =3D 0 pid =3D 132784 pid =3D 0 pid =3D 132784 ... Signed-off-by: Yang Jihong --- tools/perf/util/bpf_skel/bpf_record_action.h | 1 + tools/perf/util/bpf_skel/record_action.bpf.c | 14 ++++++++++++++ tools/perf/util/parse-action.c | 1 + tools/perf/util/parse-action.h | 1 + tools/perf/util/parse-action.l | 1 + tools/perf/util/record_action.c | 4 ++++ 6 files changed, 22 insertions(+) diff --git a/tools/perf/util/bpf_skel/bpf_record_action.h b/tools/perf/util= /bpf_skel/bpf_record_action.h index 91a307b89f85..a4817d62bce8 100644 --- a/tools/perf/util/bpf_skel/bpf_record_action.h +++ b/tools/perf/util/bpf_skel/bpf_record_action.h @@ -8,6 +8,7 @@ =20 enum __output_format_type { __OUTPUT_FORMAT_TYPE_CPU, + __OUTPUT_FORMAT_TYPE_PID, __OUTPUT_FORMAT_TYPE_MAX, }; =20 diff --git a/tools/perf/util/bpf_skel/record_action.bpf.c b/tools/perf/util= /bpf_skel/record_action.bpf.c index 4b7698554ead..fd44bb3da663 100644 --- a/tools/perf/util/bpf_skel/record_action.bpf.c +++ b/tools/perf/util/bpf_skel/record_action.bpf.c @@ -46,6 +46,17 @@ static inline int output_cpu(__u8 *data, int size) return sizeof(__u32); } =20 +static inline int output_pid(__u8 *data, int size) +{ + __u32 *pid =3D (__u32 *)data; + + if (size < sizeof(__u32)) + return -1; + + *pid =3D bpf_get_current_pid_tgid() >> 32; + return sizeof(__u32); +} + SEC("xxx") int sample_output(u64 *ctx) { @@ -68,6 +79,9 @@ int sample_output(u64 *ctx) case __OUTPUT_FORMAT_TYPE_CPU: ret =3D output_cpu(data + total, __OUTPUT_DATA_MAX_SIZE - total); break; + case __OUTPUT_FORMAT_TYPE_PID: + ret =3D output_pid(data + total, __OUTPUT_DATA_MAX_SIZE - total); + break; default: ret =3D -1; break; diff --git a/tools/perf/util/parse-action.c b/tools/perf/util/parse-action.c index 2bb32cc16ae7..0ae998a5d286 100644 --- a/tools/perf/util/parse-action.c +++ b/tools/perf/util/parse-action.c @@ -13,6 +13,7 @@ * - print * - builtin: * - cpu + * - pid */ =20 #include diff --git a/tools/perf/util/parse-action.h b/tools/perf/util/parse-action.h index ee949ed07111..e74d3b4e5de8 100644 --- a/tools/perf/util/parse-action.h +++ b/tools/perf/util/parse-action.h @@ -28,6 +28,7 @@ enum evtact_expr_call_type { =20 enum evtact_expr_builtin_type { EVTACT_EXPR_BUILTIN_TYPE_CPU, + EVTACT_EXPR_BUILTIN_TYPE_PID, EVTACT_EXPR_BUILTIN_TYPE_MAX, }; =20 diff --git a/tools/perf/util/parse-action.l b/tools/perf/util/parse-action.l index dab8066a1038..5a5bbe3e1f94 100644 --- a/tools/perf/util/parse-action.l +++ b/tools/perf/util/parse-action.l @@ -104,6 +104,7 @@ ident [_a-zA-Z][_a-zA-Z0-9]* {space} { } =20 cpu { return builtin(EVTACT_EXPR_BUILTIN_TYPE_CPU); } +pid { return builtin(EVTACT_EXPR_BUILTIN_TYPE_PID); } =20 print { return call(EVTACT_EXPR_CALL_TYPE_PRINT); } =20 diff --git a/tools/perf/util/record_action.c b/tools/perf/util/record_actio= n.c index 15e8b1740e32..1d7b603713d1 100644 --- a/tools/perf/util/record_action.c +++ b/tools/perf/util/record_action.c @@ -96,6 +96,10 @@ static int set_expr_builtin_output_format(struct evtact_= expr *expr, *format =3D __OUTPUT_FORMAT_TYPE_CPU; size =3D sizeof(u32); break; + case EVTACT_EXPR_BUILTIN_TYPE_PID: + *format =3D __OUTPUT_FORMAT_TYPE_PID; + size =3D sizeof(u32); + break; default: pr_err("set expr builtin output format unknown opcode: %u\n", opcode); return -1; --=20 2.25.1