From patchwork Wed Apr 14 14:39:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 12203005 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F58AC433B4 for ; Wed, 14 Apr 2021 14:41:52 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6A27361029 for ; Wed, 14 Apr 2021 14:41:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A27361029 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References:List-Owner; bh=ish8/ZEj1dGp/TaEBQfi/DPbMb9QBT779jNxrwiHz0k=; b=hZWI98YOB3SU4m33F4YPG4OaME 66DelwbnmzLjVBIgGfI8yiMApRr/Huh4MJz+xvn28Z8r95JH1+v+rlhCM8BFP8JFmeiaxblWnwpYC 2O3h0P4cx/gahl/Aufj6qLMJ73ZJogCE+lNW7uPI4pCxsgVrOg5GIiJBfhaneszLkQSx7foUtD+3V 3wF4Z1fGtzePANwqi8NuPCnK8jgG3zCN62dwxeZye2rAII/aUxtvmPMYVUS/rkIrZfjurbfk1GrlL zPRBT0zSJbEFODwPuI1DOdjWYLbPIu1KlSYptnDyCB2VV6XJTYhobuFMWgZEX4wgMN4SQls5tKKOW rgV1yYwA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lWggQ-00Cudl-Jx; Wed, 14 Apr 2021 14:39:59 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lWggJ-00CudM-QH for linux-arm-kernel@desiato.infradead.org; Wed, 14 Apr 2021 14:39:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=d5pXKZxWke2Fj5to2hGwfTu4sLe1LayNa8h0IMudmL4=; b=w5nLNxuv7Psyfcgib2CLsz/xHM YJR1s3pAEsOWzvSN/Qy71mXSgYNNx9uoFP0qOw0g+XbPkcB/px87ZeFjozqlNZxDHa3E/8RSxNFV1 EZjbuPwjwLrIZqeagkIM55emmxY0SeReN77y9aYgm8IjFpgRS5N7Jt8hIXrZ6BwHYb6dry0JTzKFr iTNJeJvbPhjvGVk8AyGIbX4pwVGR5rGekeuS3cQobX9eixeECMQFNpep3ZCaxFELBERrtHxvsftDm XX6olZJo38gDaMvMgaRnc6rtV/xL6Tnnu6QCOEjmymjWumbO9BztBjqnRgqgtEIBXetj9GwkDxMfT uxCbSxvg==; Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lWggF-007pjo-LI for linux-arm-kernel@lists.infradead.org; Wed, 14 Apr 2021 14:39:49 +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 077C7113E; Wed, 14 Apr 2021 07:39:40 -0700 (PDT) Received: from e121896.arm.com (unknown [10.57.47.202]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 759063F694; Wed, 14 Apr 2021 07:39:37 -0700 (PDT) From: James Clark To: coresight@lists.linaro.org Cc: al.grant@arm.com, branislav.rankov@arm.com, denik@chromium.org, suzuki.poulose@arm.com, James Clark , Mike Leach , Leo Yan , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , John Garry , Will Deacon , Mathieu Poirier , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] perf cs-etm: Refactor timestamp variable names Date: Wed, 14 Apr 2021 17:39:18 +0300 Message-Id: <20210414143919.12605-1-james.clark@arm.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210414_073947_818775_48F18A99 X-CRM114-Status: GOOD ( 23.35 ) 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 Remove ambiguity in variable names relating to timestamps. A later commit will save the sample kernel timestamp in one of the etm structs, so name all elements appropriately to avoid confusion. This is also removes some ambiguity arising from the fact that the --timestamp argument to perf record refers to sample kernel timestamps, and the /timestamp/ event modifier refers to etm timestamps, so the term is overloaded. Signed-off-by: James Clark Reviewed-by: Mathieu Poirier --- .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 18 ++++---- tools/perf/util/cs-etm.c | 42 +++++++++---------- tools/perf/util/cs-etm.h | 4 +- 3 files changed, 31 insertions(+), 33 deletions(-) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 059bcec3f651..055cb93eca59 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -276,13 +276,13 @@ cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq, const uint8_t trace_chan_id) { /* No timestamp packet has been received, nothing to do */ - if (!packet_queue->timestamp) + if (!packet_queue->etm_timestamp) return OCSD_RESP_CONT; - packet_queue->timestamp = packet_queue->next_timestamp; + packet_queue->etm_timestamp = packet_queue->next_etm_timestamp; /* Estimate the timestamp for the next range packet */ - packet_queue->next_timestamp += packet_queue->instr_count; + packet_queue->next_etm_timestamp += packet_queue->instr_count; packet_queue->instr_count = 0; /* Tell the front end which traceid_queue needs attention */ @@ -308,8 +308,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, * Function do_soft_timestamp() will report the value to the front end, * hence asking the decoder to keep decoding rather than stopping. */ - if (packet_queue->timestamp) { - packet_queue->next_timestamp = elem->timestamp; + if (packet_queue->etm_timestamp) { + packet_queue->next_etm_timestamp = elem->timestamp; return OCSD_RESP_CONT; } @@ -320,8 +320,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, * which instructions started by subtracting the number of instructions * executed to the timestamp. */ - packet_queue->timestamp = elem->timestamp - packet_queue->instr_count; - packet_queue->next_timestamp = elem->timestamp; + packet_queue->etm_timestamp = elem->timestamp - packet_queue->instr_count; + packet_queue->next_etm_timestamp = elem->timestamp; packet_queue->instr_count = 0; /* Tell the front end which traceid_queue needs attention */ @@ -334,8 +334,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, static void cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue) { - packet_queue->timestamp = 0; - packet_queue->next_timestamp = 0; + packet_queue->etm_timestamp = 0; + packet_queue->next_etm_timestamp = 0; packet_queue->instr_count = 0; } diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 7e63e7dedc33..c25da2ffa8f3 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -38,8 +38,6 @@ #include #include "util/synthetic-events.h" -#define MAX_TIMESTAMP (~0ULL) - struct cs_etm_auxtrace { struct auxtrace auxtrace; struct auxtrace_queues queues; @@ -86,7 +84,7 @@ struct cs_etm_queue { struct cs_etm_decoder *decoder; struct auxtrace_buffer *buffer; unsigned int queue_nr; - u8 pending_timestamp; + u8 pending_timestamp_chan_id; u64 offset; const unsigned char *buf; size_t buf_len, buf_used; @@ -208,7 +206,7 @@ void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq, * be more than one channel per cs_etm_queue, we need to specify * what traceID queue needs servicing. */ - etmq->pending_timestamp = trace_chan_id; + etmq->pending_timestamp_chan_id = trace_chan_id; } static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq, @@ -216,22 +214,22 @@ static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq, { struct cs_etm_packet_queue *packet_queue; - if (!etmq->pending_timestamp) + if (!etmq->pending_timestamp_chan_id) return 0; if (trace_chan_id) - *trace_chan_id = etmq->pending_timestamp; + *trace_chan_id = etmq->pending_timestamp_chan_id; packet_queue = cs_etm__etmq_get_packet_queue(etmq, - etmq->pending_timestamp); + etmq->pending_timestamp_chan_id); if (!packet_queue) return 0; /* Acknowledge pending status */ - etmq->pending_timestamp = 0; + etmq->pending_timestamp_chan_id = 0; /* See function cs_etm_decoder__do_{hard|soft}_timestamp() */ - return packet_queue->timestamp; + return packet_queue->etm_timestamp; } static void cs_etm__clear_packet_queue(struct cs_etm_packet_queue *queue) @@ -814,7 +812,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, int ret = 0; unsigned int cs_queue_nr; u8 trace_chan_id; - u64 timestamp; + u64 etm_timestamp; struct cs_etm_queue *etmq = queue->priv; if (list_empty(&queue->head) || etmq) @@ -854,7 +852,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, /* * Run decoder on the trace block. The decoder will stop when - * encountering a timestamp, a full packet queue or the end of + * encountering an ETM timestamp, a full packet queue or the end of * trace for that block. */ ret = cs_etm__decode_data_block(etmq); @@ -865,10 +863,10 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, * Function cs_etm_decoder__do_{hard|soft}_timestamp() does all * the timestamp calculation for us. */ - timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); + etm_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); /* We found a timestamp, no need to continue. */ - if (timestamp) + if (etm_timestamp) break; /* @@ -892,7 +890,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, * queue and will be processed in cs_etm__process_queues(). */ cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id); - ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); + ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, etm_timestamp); out: return ret; } @@ -2221,7 +2219,7 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) int ret = 0; unsigned int cs_queue_nr, queue_nr; u8 trace_chan_id; - u64 timestamp; + u64 etm_timestamp; struct auxtrace_queue *queue; struct cs_etm_queue *etmq; struct cs_etm_traceid_queue *tidq; @@ -2283,9 +2281,9 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) if (ret) goto out; - timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); + etm_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); - if (!timestamp) { + if (!etm_timestamp) { /* * Function cs_etm__decode_data_block() returns when * there is no more traces to decode in the current @@ -2308,7 +2306,7 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) * this queue/traceID. */ cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id); - ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); + ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, etm_timestamp); } out: @@ -2380,7 +2378,7 @@ static int cs_etm__process_event(struct perf_session *session, struct perf_tool *tool) { int err = 0; - u64 timestamp; + u64 sample_kernel_timestamp; struct cs_etm_auxtrace *etm = container_of(session->auxtrace, struct cs_etm_auxtrace, auxtrace); @@ -2394,11 +2392,11 @@ static int cs_etm__process_event(struct perf_session *session, } if (sample->time && (sample->time != (u64) -1)) - timestamp = sample->time; + sample_kernel_timestamp = sample->time; else - timestamp = 0; + sample_kernel_timestamp = 0; - if (timestamp || etm->timeless_decoding) { + if (sample_kernel_timestamp || etm->timeless_decoding) { err = cs_etm__update_queues(etm); if (err) return err; diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 36428918411e..b300f6fa19cc 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -171,8 +171,8 @@ struct cs_etm_packet_queue { u32 head; u32 tail; u32 instr_count; - u64 timestamp; - u64 next_timestamp; + u64 etm_timestamp; + u64 next_etm_timestamp; struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER]; };