From patchwork Tue Jun 11 15:02:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13693912 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D6758C27C75 for ; Tue, 11 Jun 2024 15:03:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vCO8bZEDYhNNSYDpb6IMlClAB/z31opmXJNxvVZZNJA=; b=c5aeYEbKpxOl+y SYP6OCROrq3+KWGL2lE3ME7gTLM46uiA+vXvU7s8qy53MldO9CJzJT0aCop7bTsxjQp1s6RiGAkZ0 ttube6dGT9QSbVHwno5kFsaoXkMsZAwrljw1HmhwQkAqd3SHU2+yWcT9M1Jgt/BNxnukQ2cbEZysi 9nSA5ftCKCLJe87v06sX0WfGFl7rzRMxWWfrGp53Og91dcnwkw/hhfXZnIHpk4P1BMlynTJVs68r9 XMRf0DU75Eyasd4Sv19zrMSHqv6CtQnpNxOISo5AUoGFdsLSvbPRCGu2lOwpw98ADsg3IT6QoYj1E U2nogu46jEOgKq2tnGAQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sH31a-00000009F1J-1q1O; Tue, 11 Jun 2024 15:03:02 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sH31W-00000009Ey9-1xzH for linux-arm-kernel@lists.infradead.org; Tue, 11 Jun 2024 15:03:00 +0000 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 202ED152B; Tue, 11 Jun 2024 08:03:19 -0700 (PDT) Received: from e127643.arm.com (unknown [10.57.41.181]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9CEA93F64C; Tue, 11 Jun 2024 08:02:50 -0700 (PDT) From: James Clark To: coresight@lists.linaro.org, suzuki.poulose@arm.com, gankulkarni@os.amperecomputing.com, mike.leach@linaro.org, leo.yan@linux.dev, anshuman.khandual@arm.com Cc: James Clark , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , John Garry , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-perf-users@vger.kernel.org Subject: [PATCH v3 02/14] perf: cs-etm: Allocate queues for all CPUs Date: Tue, 11 Jun 2024 16:02:13 +0100 Message-Id: <20240611150228.1802828-3-james.clark@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240611150228.1802828-1-james.clark@arm.com> References: <20240611150228.1802828-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240611_080258_773726_B492444E X-CRM114-Status: GOOD ( 23.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Make cs_etm__setup_queue() setup a queue even if it's empty, and pre-allocate queues based on the max CPU that was recorded. In per-CPU mode aux queues are indexed based on CPU ID even if all CPUs aren't recorded, sparse queue arrays aren't used. This will allow HW_IDs to be saved even if no aux data was received in that queue without having to call cs_etm__setup_queue() from two different places. Signed-off-by: James Clark --- tools/perf/util/cs-etm.c | 55 ++++++++++++++++++++-------------------- 1 file changed, 27 insertions(+), 28 deletions(-) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index f09004c4ba44..e40dfd09d3ed 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -104,6 +104,7 @@ struct cs_etm_queue { unsigned int queue_nr; u8 pending_timestamp_chan_id; bool formatted; + bool formatted_set; u64 offset; const unsigned char *buf; size_t buf_len, buf_used; @@ -1056,16 +1057,11 @@ static struct cs_etm_queue *cs_etm__alloc_queue(void) static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, struct auxtrace_queue *queue, - unsigned int queue_nr, bool formatted) + unsigned int queue_nr) { struct cs_etm_queue *etmq = queue->priv; - if (etmq && formatted != etmq->formatted) { - pr_err("CS_ETM: mixed formatted and unformatted trace not supported\n"); - return -EINVAL; - } - - if (list_empty(&queue->head) || etmq) + if (etmq) return 0; etmq = cs_etm__alloc_queue(); @@ -1078,7 +1074,6 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, etmq->queue_nr = queue_nr; queue->cpu = queue_nr; /* Placeholder, may be reset to -1 in per-thread mode */ etmq->offset = 0; - etmq->formatted = formatted; return 0; } @@ -2791,17 +2786,6 @@ static int cs_etm__process_auxtrace_event(struct perf_session *session, if (err) return err; - /* - * Knowing if the trace is formatted or not requires a lookup of - * the aux record so only works in non-piped mode where data is - * queued in cs_etm__queue_aux_records(). Always assume - * formatted in piped mode (true). - */ - err = cs_etm__setup_queue(etm, &etm->queues.queue_array[idx], - idx, true); - if (err) - return err; - if (dump_trace) if (auxtrace_buffer__get_data(buffer, fd)) { cs_etm__dump_event(etm->queues.queue_array[idx].priv, buffer); @@ -2918,7 +2902,6 @@ static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o struct perf_record_auxtrace *auxtrace_event; union perf_event auxtrace_fragment; __u64 aux_offset, aux_size; - __u32 idx; bool formatted; struct cs_etm_auxtrace *etm = container_of(session->auxtrace, @@ -2985,6 +2968,8 @@ static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o if (aux_offset >= auxtrace_event->offset && aux_offset + aux_size <= auxtrace_event->offset + auxtrace_event->size) { + struct cs_etm_queue *etmq = etm->queues.queue_array[auxtrace_event->idx].priv; + /* * If this AUX event was inside this buffer somewhere, create a new auxtrace event * based on the sizes of the aux event, and queue that fragment. @@ -3001,10 +2986,14 @@ static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o if (err) return err; - idx = auxtrace_event->idx; formatted = !(aux_event->flags & PERF_AUX_FLAG_CORESIGHT_FORMAT_RAW); - - return cs_etm__setup_queue(etm, &etm->queues.queue_array[idx], idx, formatted); + if (etmq->formatted_set && formatted != etmq->formatted) { + pr_err("CS_ETM: mixed formatted and unformatted trace not supported\n"); + return -EINVAL; + } + etmq->formatted = formatted; + etmq->formatted_set = true; + return 0; } /* Wasn't inside this buffer, but there were no parse errors. 1 == 'not found' */ @@ -3256,6 +3245,7 @@ static int cs_etm__create_decoders(struct cs_etm_auxtrace *etm) * Don't create decoders for empty queues, mainly because * etmq->formatted is unknown for empty queues. */ + assert(empty == !etmq->formatted_set); if (empty) continue; @@ -3275,10 +3265,10 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, int event_header_size = sizeof(struct perf_event_header); int total_size = auxtrace_info->header.size; int priv_size = 0; - int num_cpu; + int num_cpu, max_cpu = 0; int err = 0; int aux_hw_id_found; - int i, j; + int i; u64 *ptr = NULL; u64 **metadata = NULL; @@ -3309,7 +3299,7 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, * required by the trace decoder to properly decode the trace due * to its highly compressed nature. */ - for (j = 0; j < num_cpu; j++) { + for (int j = 0; j < num_cpu; j++) { if (ptr[i] == __perf_cs_etmv3_magic) { metadata[j] = cs_etm__create_meta_blk(ptr, &i, @@ -3333,6 +3323,9 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, err = -ENOMEM; goto err_free_metadata; } + + if ((int) metadata[j][CS_ETM_CPU] > max_cpu) + max_cpu = metadata[j][CS_ETM_CPU]; } /* @@ -3362,10 +3355,16 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, */ etm->pid_fmt = cs_etm__init_pid_fmt(metadata[0]); - err = auxtrace_queues__init(&etm->queues); + err = auxtrace_queues__init_nr(&etm->queues, max_cpu + 1); if (err) goto err_free_etm; + for (unsigned int j = 0; j < etm->queues.nr_queues; ++j) { + err = cs_etm__setup_queue(etm, &etm->queues.queue_array[j], j); + if (err) + goto err_free_queues; + } + if (session->itrace_synth_opts->set) { etm->synth_opts = *session->itrace_synth_opts; } else { @@ -3487,7 +3486,7 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, zfree(&etm); err_free_metadata: /* No need to check @metadata[j], free(NULL) is supported */ - for (j = 0; j < num_cpu; j++) + for (int j = 0; j < num_cpu; j++) zfree(&metadata[j]); zfree(&metadata); err_free_traceid_list: