From patchwork Thu Mar 25 06:40:34 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: 12163083 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=-15.8 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 49962C433E1 for ; Thu, 25 Mar 2021 06:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 20E2F61A25 for ; Thu, 25 Mar 2021 06:42:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229642AbhCYGld (ORCPT ); Thu, 25 Mar 2021 02:41:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229533AbhCYGlB (ORCPT ); Thu, 25 Mar 2021 02:41:01 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF152C06174A for ; Wed, 24 Mar 2021 23:41:00 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id p19so528161wmq.1 for ; Wed, 24 Mar 2021 23:41:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=U+Rurdt3TLvNbFd+pb3BnO5RroijQkjhTL6sPJpY6XE=; b=uGPKYN30B6hOJNEIB5o2CJEq7Gb45vq66numMHs11jvHt8d+zOv2ru2Pi4dBk9kQiY oTjp3FH0ZeCjqtgVTspeOQHDI8cP2a2C2+/mTkIXueSWwcEEjsjj7Ci2AeKyPFhaow5Z Zrq9tnS7QTEN/ct5mGHPVv/VfJK4NZpororytW/V6xeAeQh164ho9GDJRdGTt00iu+SX WkLDr8WmEgO0nZl2Yj7H7J62oiCSUVZuaBjIothtRXmCT/lN4grUPJ0rU3rlRH7gps/M CviogicIuuAkFc8ZDK6tK/y7jDx5SI3B9v7va3+fkJkA8uaGpGQiFH/d8hbCcJpj2i/M 6YCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=U+Rurdt3TLvNbFd+pb3BnO5RroijQkjhTL6sPJpY6XE=; b=QUtPd1VPze/lt8k5xROqzkr3QBArWrdW7GUdTG5LxAefmR4lnLe6CBNxF14XdHnp/g 16iFRl3z1m2lJkI4nFucbhq1kbD9NuZs06yGYd/0Y4hnmea97Pjw1PI3/Lp9nR9kQjRN 9/XM4JGjvo5bqRHvzON+gz+My07ioxbza8gdUoQeVXRYljcP0X1+kDFSUSSPhRVHQxj0 nCl3fiJZ1xjgd0+KDyda+Fsn46X3pwbdYBMyrVq8KVC682ns8EEqazdziwt1NYVUIavW 93SY7KYPukEcf4T9L/1qFlGxQbxHjTsz+pheFZaEWFWa3hXffi1ITcBTkUrHQF82m1XL rpyg== X-Gm-Message-State: AOAM533lcP4iizzp2r+WvUiwLjZ57uozBx/T0LY8VT1c8zMzKZkB4IZo Z0YAqVfwiRUSL+1+mohQTMos1fJfneg+UA== X-Google-Smtp-Source: ABdhPJz1SU2BWM9atDOzDr4cO6MxmeNWl0JON+DVORW3YB+f/rdk7SKsunI+n1uEHq4I/HuKF3atwQ== X-Received: by 2002:a05:600c:4292:: with SMTP id v18mr6147206wmc.23.1616654459606; Wed, 24 Mar 2021 23:40:59 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id e17sm6403259wra.65.2021.03.24.23.40.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Mar 2021 23:40:59 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v4 02/23] trace-cmd: Extend trace-cmd dump subcommand to display the clock Date: Thu, 25 Mar 2021 08:40:34 +0200 Message-Id: <20210325064055.539554-3-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210325064055.539554-1-tz.stoyanov@gmail.com> References: <20210325064055.539554-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Trace clock, used to record the tracing data is saved in the trace.dat file. As "trace-cmd dump" command shows the metadata content of the file, it should display the trace clock also. Added a new parameter "trace-cmd dump --clock" which shows the clock saved in the file. The clock can be displayed also with "trace-cmd dump --all" Signed-off-by: Tzvetomir Stoyanov (VMware) --- Documentation/trace-cmd/trace-cmd-dump.1.txt | 2 ++ tracecmd/trace-dump.c | 34 +++++++++++++++++++- tracecmd/trace-usage.c | 1 + 3 files changed, 36 insertions(+), 1 deletion(-) diff --git a/Documentation/trace-cmd/trace-cmd-dump.1.txt b/Documentation/trace-cmd/trace-cmd-dump.1.txt index 71b8e655..0f8626fa 100644 --- a/Documentation/trace-cmd/trace-cmd-dump.1.txt +++ b/Documentation/trace-cmd/trace-cmd-dump.1.txt @@ -46,6 +46,8 @@ OPTIONS Print all options, stored in the file. *--flyrecord*:: Print the offset and the size of tracing data per each CPU. +*--clock*:: + Print the trace clock, used for timestamp of the tracing events, stored in the file. *--all*:: Print all meta data from the file. *--help*:: diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c index 6172231e..5db1ecfa 100644 --- a/tracecmd/trace-dump.c +++ b/tracecmd/trace-dump.c @@ -24,6 +24,7 @@ static struct tep_handle *tep; static unsigned int trace_cpus; +static int has_clock; enum dump_items { SUMMARY = (1 << 0), @@ -37,6 +38,7 @@ enum dump_items { CMDLINES = (1 << 8), OPTIONS = (1 << 9), FLYRECORD = (1 << 10), + CLOCK = (1 << 11), }; enum dump_items verbosity; @@ -496,7 +498,7 @@ static void dump_options(int fd) die("cannot read the option size"); count++; - if (!DUMP_CHECK(OPTIONS)) { + if (!DUMP_CHECK(OPTIONS) && !DUMP_CHECK(CLOCK) && !DUMP_CHECK(SUMMARY)) { lseek64(fd, size, SEEK_CUR); continue; } @@ -512,6 +514,7 @@ static void dump_options(int fd) break; case TRACECMD_OPTION_TRACECLOCK: dump_option_string(fd, size, "TRACECLOCK"); + has_clock = 1; break; case TRACECMD_OPTION_UNAME: dump_option_string(fd, size, "UNAME"); @@ -556,6 +559,29 @@ static void dump_latency(int fd) do_print(SUMMARY, "\t[Latency tracing data]\n"); } +static void dump_clock(int fd) +{ + long long size; + char *clock; + + do_print((SUMMARY | CLOCK), "\t[Tracing clock]\n"); + if (!has_clock) { + do_print((SUMMARY | CLOCK), "\t\t No tracing clock saved in the file\n"); + return; + } + if (read_file_number(fd, &size, 8)) + die("cannot read clock size"); + clock = calloc(1, size); + if (!clock) + die("cannot allocate clock %d bytes", size); + + if (read_file_bytes(fd, clock, size)) + die("cannot read clock %d bytes", size); + clock[size] = 0; + do_print((SUMMARY | CLOCK), "\t\t%s\n", clock); + free(clock); +} + static void dump_flyrecord(int fd) { long long cpu_offset; @@ -572,6 +598,7 @@ static void dump_flyrecord(int fd) do_print(FLYRECORD, "\t\t %lld %lld\t[offset, size of cpu %d]\n", cpu_offset, cpu_size, i); } + dump_clock(fd); } static void dump_therest(int fd) @@ -626,6 +653,7 @@ static void dump_file(const char *file) } enum { + OPT_clock = 243, OPT_all = 244, OPT_summary = 245, OPT_flyrecord = 246, @@ -666,6 +694,7 @@ void trace_dump(int argc, char **argv) {"cmd-lines", no_argument, NULL, OPT_cmd_lines}, {"options", no_argument, NULL, OPT_options}, {"flyrecord", no_argument, NULL, OPT_flyrecord}, + {"clock", no_argument, NULL, OPT_clock}, {"validate", no_argument, NULL, 'v'}, {"help", no_argument, NULL, '?'}, {NULL, 0, NULL, 0} @@ -721,6 +750,9 @@ void trace_dump(int argc, char **argv) case OPT_head_page: verbosity |= HEAD_PAGE; break; + case OPT_clock: + verbosity |= CLOCK; + break; default: usage(argv); } diff --git a/tracecmd/trace-usage.c b/tracecmd/trace-usage.c index 1a7abd58..22537d20 100644 --- a/tracecmd/trace-usage.c +++ b/tracecmd/trace-usage.c @@ -377,6 +377,7 @@ static struct usage_help usage_help[] = { " --cmd-lines print information mapping a PID to a process name\n" " --options print options\n" " --flyrecord information of offset and count of recorded events per CPU\n" + " --clock trace clock, saved in the file\n" " -h, --help show usage information\n" }, {