From patchwork Tue Sep 14 13:14:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12493283 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 05380C4332F for ; Tue, 14 Sep 2021 13:15:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E3B1A610D1 for ; Tue, 14 Sep 2021 13:15:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233247AbhINNQ0 (ORCPT ); Tue, 14 Sep 2021 09:16:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233181AbhINNQ0 (ORCPT ); Tue, 14 Sep 2021 09:16:26 -0400 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3359C061574 for ; Tue, 14 Sep 2021 06:15:08 -0700 (PDT) Received: by mail-wr1-x430.google.com with SMTP id d6so20139901wrc.11 for ; Tue, 14 Sep 2021 06:15:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=lNiHFGAi6rFItmFwzhQM7pzcHo1dNW3NyHEcsDYYd/E=; b=HkX/qDd1YkLZu8byfaQdhcCr2C1NNyPWpz5IQeYPfMH6B2YqmBmZ+ZWhTBOQORxbfz bARL6MaSkbba1FqkWVOxEL1kMY85D1xTavLoVLi9zTg7YuMMPnzBsiSxDa/+u2LDi9Pw l+JUCrRzPk0ybAyMh6mAr5CURlCY335fsoW1W4a96tt1M4ZsOu/F3Z97Ue3DMBtTPVnH i4h6EndwLeJLUxRm3vumKesLXUiPZYz56jHU7+fkhPS89ShdhG9uIjZ0rnmrN5+jGsad 6QS2oVVd919d5PfoBGGfClC8ENA2A6q354freoZf5smM7kWRknu5nt2WJx0mWpiU7jzF 57fQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=lNiHFGAi6rFItmFwzhQM7pzcHo1dNW3NyHEcsDYYd/E=; b=cuafA8nde9fCApB3hB3yWYQh3jLse0bCTJLRfSoMG3AdDU6J4vYAMn+QvtD/9fSFVX RnSA1rPK9/T8WvawWx02K5m+FHP8S5Lhlr3y8SDty99etWDKFUkZR9zqjkHUt+YJKbq3 kGrOoTUh1hXKS3YxjaQeI/k8UsG/L7ZCP9bwlo3ocTJl+YYq5yF33GJoVBs0Aywu9IXK 8uj8zzrE2WAtfVy64D8+sphxkWi3a4X/rxWlQ/AevdwZdBW4OHGAGOqsXOwI6oBgXhqc 8TLhJW2ccsuLbNOjr4jj46QJHBj9V7hocTZ5Z23iXcA27AuzLIKrd8bqeOqQt+oD31vb kPdw== X-Gm-Message-State: AOAM531rOn1Prq5TqlfeY6sbMqeNFvchnFiy2Csvix/Nws0lNk7ywLfb t2u7PMGw8tjYnyf3UH/XGdAARFMWWUs= X-Google-Smtp-Source: ABdhPJzgBBBUnV4i3Eu1HY69SAJCuD29bQ1RwXXDicMQxARTIwwQnQX2wKz1m5yNdquVdgxAjw6mNg== X-Received: by 2002:a5d:4bc8:: with SMTP id l8mr19288416wrt.105.1631625307447; Tue, 14 Sep 2021 06:15:07 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id y9sm1274760wmj.36.2021.09.14.06.15.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Sep 2021 06:15:06 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v3 21/25] trace-cmd library: Handle latency trace in version 7 files Date: Tue, 14 Sep 2021 16:14:34 +0300 Message-Id: <20210914131438.3965484-22-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210914131438.3965484-1-tz.stoyanov@gmail.com> References: <20210914131438.3965484-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Latency trace data is saved the same was as flyrecord buffer data in trace files version 7. There is a BUFFER_TEXT option which holds the latency specific trace metadata and points to the section in the file with the trace data. A new API is added to read latency data: tracecmd_latency_data_read() Signed-off-by: Tzvetomir Stoyanov (VMware) --- .../include/private/trace-cmd-private.h | 5 +++- lib/trace-cmd/trace-input.c | 29 ++++++++++++++++++- lib/trace-cmd/trace-output.c | 5 +++- tracecmd/trace-record.c | 3 +- 4 files changed, 38 insertions(+), 4 deletions(-) diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h index a08890df..045fd5a1 100644 --- a/lib/trace-cmd/include/private/trace-cmd-private.h +++ b/lib/trace-cmd/include/private/trace-cmd-private.h @@ -221,6 +221,8 @@ tracecmd_peek_data_ref(struct tracecmd_input *handle, int cpu) return rec; } +int tracecmd_latency_data_read(struct tracecmd_input *handle, char **buf, size_t *size); + struct tep_record * tracecmd_read_prev(struct tracecmd_input *handle, struct tep_record *record); @@ -295,7 +297,8 @@ int tracecmd_output_write_init(struct tracecmd_output *handler); int tracecmd_output_write_headers(struct tracecmd_output *handler, struct tracecmd_event_list *list); -struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, int cpus); +struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, int cpus, + int file_version); struct tracecmd_output *tracecmd_create_init_fd(int fd); struct tracecmd_output *tracecmd_create_init_file(const char *output_file); diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index 87c33423..1b4a4d6b 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -3203,6 +3203,24 @@ static int read_options_type(struct tracecmd_input *handle) return 0; } +int tracecmd_latency_data_read(struct tracecmd_input *handle, char **buf, size_t *size) +{ + if (!handle || !buf || !size) + return -1; + if (handle->file_state != TRACECMD_FILE_CPU_LATENCY) + return -1; + + /* Read data from a file */ + if (!(*buf)) { + *size = BUFSIZ; + *buf = malloc(*size); + if (!(*buf)) + return -1; + } + + return do_read(handle, *buf, *size); +} + static int init_cpu_data(struct tracecmd_input *handle) { enum kbuffer_long_size long_size; @@ -3265,6 +3283,12 @@ static int init_cpu_data(struct tracecmd_input *handle) return -1; } +int init_latency_data(struct tracecmd_input *handle) +{ + /* To do */ + return 0; +} + static int init_buffer_cpu_data(struct tracecmd_input *handle, struct input_buffer_instance *buffer) { unsigned long long offset; @@ -3279,7 +3303,10 @@ static int init_buffer_cpu_data(struct tracecmd_input *handle, struct input_buff return -1; if (read_section_header(handle, &id, &flags, NULL, NULL)) return -1; - + if (buffer->latency) { + handle->file_state = TRACECMD_FILE_CPU_LATENCY; + return init_latency_data(handle) == 0 ? 1 : -1; + } handle->file_state = TRACECMD_FILE_CPU_FLYRECORD; handle->cpus = buffer->cpus; if (handle->max_cpu < handle->cpus) diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index b3904204..645a8ab7 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -1786,7 +1786,8 @@ out_add_buffer_option_v7(struct tracecmd_output *handle, const char *name, return option; } -struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, int cpus) +struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, int cpus, + int file_version) { enum tracecmd_section_flags flags = 0; struct tracecmd_output *handle; @@ -1801,6 +1802,8 @@ struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, in handle = tracecmd_output_allocate(fd); if (!handle) goto out_free; + if (file_version && tracecmd_output_set_version(handle, file_version)) + goto out_free; if (tracecmd_output_write_init(handle)) goto out_free; if (tracecmd_output_write_headers(handle, NULL)) diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index 879acb7c..af7f332c 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -4505,7 +4505,8 @@ static void record_data(struct common_record_context *ctx) return; if (latency) { - handle = tracecmd_create_file_latency(ctx->output, local_cpu_count); + handle = tracecmd_create_file_latency(ctx->output, local_cpu_count, + ctx->file_version); tracecmd_set_quiet(handle, quiet); } else { if (!local_cpu_count)