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Wed, 1 Jul 2026 08:41:50 +0000 (GMT) From: Athira Rajeev To: acme@kernel.org, jolsa@kernel.org, adrian.hunter@intel.com, maddy@linux.ibm.com, irogers@google.com, namhyung@kernel.org Cc: linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, atrajeev@linux.ibm.com, hbathini@linux.vnet.ibm.com, tejas05@linux.ibm.com, tshah@linux.ibm.com, venkat88@linux.ibm.com Subject: [PATCH 8/9] tools/perf/powerpc: Add event name as htm of PERF_TYPE_SYNTH type to present htm samples Date: Wed, 1 Jul 2026 14:11:14 +0530 Message-Id: <20260701084115.80383-9-atrajeev@linux.ibm.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20260701084115.80383-1-atrajeev@linux.ibm.com> References: <20260701084115.80383-1-atrajeev@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: _JYhAfF-WqPF-ojp-RRJh1VCe1X9yKZo X-Proofpoint-Spam-Info: AW1haW4tMjYwNzAxMDA4NCBTYWx0ZWRfX6uOyTwJafllR smjc2bJNhrVkhawde6m4fv7DukctcFvG4gYHssA+1o9TBE3RrPI5sCrLlFA/lW2vtTADP6u0JP+ DAvMMWiQTd2pIcDJseiS8fH0FFEq6UM= X-Authority-Analysis: v=2.4 cv=edsNubEH c=1 sm=1 tr=0 ts=6a44d2d8 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=0c5kpZ5o8VaU0JCb9dwA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzAxMDA4NCBTYWx0ZWRfX9lXj47uDJkC9 x6rrVYAb0ZyV9AMplInBtAvb4fe/ymSxwDKkco0J29U172dksgXOhxEmoFOvinskaSoxYcV3ny2 zABKcDOwfMLT6VNAF/RAHelRoeW5Hy0DWZfLUd5t9NU+vZdS+5BfoRkAz7mcKcCdRNNMDi3I7dR E9LZMAX804Q6qclrSKCm7L0sj9JZhlBqWA+T3pnPuWYj8g6+/8A3QxTDTVD1LVBuEP4IdKLdLwT J3i7PV9r3PyR3dm/KuCMkt/42EpIvptAq5EQ1qQWrHT5zf02ksw5U5TmjKnyJZwEhEeGBeOwyCE DV+X16vnLki8w4psPdg0lm3RxFo3bQFK1TrPkIDYs+27U93z54jnFXmuDKDFfqaGS9FdFZAGYuG Jq2ZsKFeUC815vFOSj25JBFvFjmagoPvayETclj+deauKt7PyaYx5gmprwAq9JxvzZBVSIgQi8Z wJU87cjhtfvQ4Pg2zUA== X-Proofpoint-ORIG-GUID: d9JEXpZqt7TD4DNlHP808Teuj7iK-6B3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-07-01_02,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 adultscore=0 impostorscore=0 bulkscore=0 spamscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607010084 HTM trace details are captured as-is in PERF_RECORD_AUXTRACE records. To present htm entries as samples, create an event with name as "htm" and type PERF_TYPE_SYNTH. Add perf_synth_id, "PERF_SYNTH_POWERPC_HTM" as config value for the event. Create a sample id to be a fixed offset from evsel id. Invoke powerpc_htm_create_sample() using the logical address as sample ip. This will help in understanding hot logical address from the traces. Usage: # perf record -C 1 -e htm/nodalchipindex=2,nodeindex=0,htm_type=1/ -o perf_1.data ls 1>out [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 257.504 MB perf_1.data ] # ./perf report -i perf_1.data # Samples: 8M of event 'htm' # Event count (approx.): 8515199 # # Children Self Command Shared Object Symbol # ........ ........ ....... ................ ...................... # 0.61% 0.61% swapper [unknown] [.] 0x00000006fd567fe0 0.33% 0.33% swapper [unknown] [.] 0x00000006fc194b20 0.20% 0.20% swapper [unknown] [.] 0x0000000066113f80 0.18% 0.18% swapper [unknown] [.] 0x00000007fd888f20 0.15% 0.15% swapper [unknown] [.] 0x00000006fd567fc0 0.08% 0.08% swapper [unknown] [.] 0x00000006fc194b00 0.05% 0.05% swapper [unknown] [.] 0x00000007fd888f00 0.03% 0.03% swapper [unknown] [.] 0x0000000422510700 0.03% 0.03% swapper [unknown] [.] 0x0000000422510820 0.03% 0.03% swapper [unknown] [.] 0x00000007fd888b80 0.02% 0.02% swapper [unknown] [.] 0x000000000a0ece40 0.02% 0.02% swapper [unknown] [.] 0x000000000a0ed2e0 0.01% 0.01% swapper [unknown] [.] 0x00000007fd888c40 0.01% 0.01% swapper [unknown] [.] 0x00000007fd889000 0.01% 0.01% swapper [unknown] [.] 0x00000007fd5bc200 0.01% 0.01% swapper [unknown] [.] 0x00000007fd61c200 0.01% 0.01% swapper [unknown] [.] 0x00000007fd28c200 0.01% 0.01% swapper [unknown] [.] 0x00000007fd22c200 0.01% 0.01% swapper [unknown] [.] 0x00000007fd1fc200 Signed-off-by: Athira Rajeev --- tools/perf/util/event.h | 1 + tools/perf/util/powerpc-htm.c | 110 +++++++++++++++++++++++++++++++++- 2 files changed, 109 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 2ea83fdf8a03..f5aa7eb9f5b7 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -118,6 +118,7 @@ enum perf_synth_id { PERF_SYNTH_INTEL_EVT, PERF_SYNTH_INTEL_IFLAG_CHG, PERF_SYNTH_POWERPC_VPA_DTL, + PERF_SYNTH_POWERPC_HTM, }; /* diff --git a/tools/perf/util/powerpc-htm.c b/tools/perf/util/powerpc-htm.c index 83253850870c..050fbceac71e 100644 --- a/tools/perf/util/powerpc-htm.c +++ b/tools/perf/util/powerpc-htm.c @@ -42,6 +42,7 @@ struct powerpc_htm { char trans_file[64]; int htm_mem_entries; int mem_maps; + u64 sample_id; }; struct htm_mem { @@ -128,6 +129,43 @@ static int run_htmdecode(const char *input_file, const char *output_file) return 0; } +static int powerpc_htm_create_sample(unsigned long addr, struct perf_session *session, + struct powerpc_htm *htm) +{ + struct perf_sample sample; + union perf_event event; + + if (dump_trace) + return 0; + + memset(&sample, 0, sizeof(sample)); + sample.cpumode = PERF_RECORD_MISC_USER; + + if (!addr) + return 0; + + if (addr >= 0xc000000000000000) + sample.cpumode = PERF_RECORD_MISC_KERNEL; + + sample.ip = addr; + sample.period = 1; + sample.cpu = 0; + sample.id = htm->sample_id; + sample.callchain = NULL; + sample.branch_stack = NULL; + memset(&event, 0, sizeof(event)); + event.sample.header.type = PERF_RECORD_SAMPLE; + event.sample.header.misc = sample.cpumode; + event.sample.header.size = sizeof(struct perf_event_header); + + if (perf_session__deliver_synth_event(session, &event, &sample)) { + pr_debug("Failed to create sample for htm entry\n"); + return -1; + } + + return 0; +} + static void *safe_realloc(void *ptr, size_t new_size) { void *tmp = realloc(ptr, new_size); @@ -309,7 +347,7 @@ static struct addr_map *process_trace_file(const char *trace_file, return maps; } -static int create_mem_maps(struct powerpc_htm *htm) +static int create_mem_maps(struct perf_session *session, struct powerpc_htm *htm) { off_t file_size; void *htmdata, *mapped_data; @@ -422,6 +460,7 @@ static int create_mem_maps(struct powerpc_htm *htm) maps[i].event, maps[i].phys_addr, (unsigned long)maps[i].logical_addr); + powerpc_htm_create_sample(maps[i].logical_addr, session, htm); } free(maps); @@ -581,7 +620,7 @@ static int powerpc_htm_process_event(struct perf_session *session __maybe_unused } /* Only for power bus traces, we decode traces */ if (config == 1) - create_mem_maps(htm); + create_mem_maps(session, htm); } return 0; @@ -636,6 +675,69 @@ static void powerpc_htm_print_info(__u64 *arr) fprintf(stdout, powerpc_htm_info_fmts[POWERPC_HTM_TYPE], arr[POWERPC_HTM_TYPE]); } +static void set_event_name(struct evlist *evlist, u64 id, + const char *name) +{ + struct evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->core.id && evsel->core.id[0] == id) { + if (evsel->name) + zfree(&evsel->name); + evsel->name = strdup(name); + if (!evsel->name) { + pr_err("Failed to allocate memory for event name\n"); + return; + } + break; + } + } +} + +static int +powerpc_htm_synth_events(struct powerpc_htm *htm, struct perf_session *session) +{ + struct evlist *evlist = session->evlist; + struct evsel *evsel; + struct perf_event_attr attr; + bool found = false; + u64 id; + int err; + + evlist__for_each_entry(evlist, evsel) { + if (strstarts(evsel->name, "htm")) { + found = true; + break; + } + } + + if (!found) { + pr_debug("No selected events with HTM trace data\n"); + return 0; + } + + memset(&attr, 0, sizeof(struct perf_event_attr)); + attr.size = sizeof(struct perf_event_attr); + attr.sample_type = evsel->core.attr.sample_type; + attr.sample_id_all = evsel->core.attr.sample_id_all; + attr.type = PERF_TYPE_SYNTH; + attr.config = PERF_SYNTH_POWERPC_HTM; + + /* create new id val to be a fixed offset from evsel id */ + id = evsel->core.id[0] + 1000000000; + if (!id) + id = 1; + + err = perf_session__deliver_synth_attr_event(session, &attr, id); + if (err) + return err; + + htm->sample_id = id; + set_event_name(evlist, id, "htm"); + + return 0; +} + int powerpc_htm_process_auxtrace_info(union perf_event *event, struct perf_session *session) { @@ -698,6 +800,10 @@ int powerpc_htm_process_auxtrace_info(union perf_event *event, if (err) goto err_free_queues; + err = powerpc_htm_synth_events(htm, session); + if (err) + goto err_free; + return 0; err_free_queues: -- 2.52.0