From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 51A39C43215 for ; Wed, 27 Nov 2019 14:03:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1FE45206F0 for ; Wed, 27 Nov 2019 14:03:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ksjYqnlk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727116AbfK0ODD (ORCPT ); Wed, 27 Nov 2019 09:03:03 -0500 Received: from mail-lj1-f196.google.com ([209.85.208.196]:46090 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726881AbfK0ODD (ORCPT ); Wed, 27 Nov 2019 09:03:03 -0500 Received: by mail-lj1-f196.google.com with SMTP id e9so24590228ljp.13 for ; Wed, 27 Nov 2019 06:03:02 -0800 (PST) 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=S5U9SmDY9JT28W6d0apExNxzS8k4zqM51/rvn+do++I=; b=ksjYqnlkwrD1Xfve7ToftW71jaMeOXHV4/XZmQD8cgzgAMF7zccBaqlX3OKm8J9dZY lTeGx7kwqm6giWjtl8622C6ebsE/IIXJ9uCgSsVZjGZl509AdpBMNX6TCGZ/cvCyWVG6 V7ax4fTfeyIdZX1lx2KSAK7MKZDtDrB0NT/3u6RFXd6nGKZYN41qy17Z/zWmIplIyxg7 CjS4bIHc82Y1piOcJWnXcWhkkJgXpTIda4jRXKebm8oNWrqP5USlLXg9x/PJjYa3g7kE HFtYbU8Uak6adiX+b87geovv2gK4EfcRbl4WzaHnZNbsJbH4T5kp6eCgxjqFWbHdLrXQ Qqjw== 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=S5U9SmDY9JT28W6d0apExNxzS8k4zqM51/rvn+do++I=; b=jpNJeAcX2HB7RE3z2+sTYpUXYHZFO94f69zq/g7WJwIlIn8XtwlbRB4BAjmS+Kf5CZ 5s8T/oViIHv+SGbJGpLeK+o4SsJL41J9SfLKHLuWt2HBVjQ+m572SD9iPu8CTi2012uE frtfhmuZsQrAgpXTgA8yNxfz5NpzVTJGbDC1RNOypai4KQBZnI7iRYn1Kpv6eqH9S5OC 6XYa4L5pTg6yFFHxCacenKI5V/swjK3UsiSXviZCfICveRWFNChqwYAsC5JTfdGTZLoR h1tCmloBh+HNgvSwwz8WNQSzx41HF45jvKN1nUDMpnTNtMdkON1o1lPYIYYcAEkRVujQ BKIQ== X-Gm-Message-State: APjAAAU8PKVOZeLl5ayoUU5WQJugY+EevbU/BYhA53VmVc2MjTRioqUi RnGUZ4qPAP2CBJGTRN8Yssv02WgBkkE= X-Google-Smtp-Source: APXvYqxjGc64k0j7EuzF5Fubu/GifdrGg6/3op2VS09zS6sWKHVpk0Oqexf+CVQf+FdyA37DsJ2eOA== X-Received: by 2002:a2e:b4da:: with SMTP id r26mr28468673ljm.153.1574863381401; Wed, 27 Nov 2019 06:03:01 -0800 (PST) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id y18sm7268660lja.12.2019.11.27.06.03.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Nov 2019 06:03:00 -0800 (PST) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v14 10/19] trace-cmd: Add new API to generate a unique ID of the tracing session Date: Wed, 27 Nov 2019 16:02:38 +0200 Message-Id: <20191127140247.258766-11-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191127140247.258766-1-tz.stoyanov@gmail.com> References: <20191127140247.258766-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org A new libtracecmd API is implemented: unsigned long long tracecmd_generate_traceid(void); At trace-cmd init phase a unique ID, used for the current tracing session. Signed-off-by: Tzvetomir Stoyanov (VMware) --- include/trace-cmd/trace-cmd.h | 1 + lib/trace-cmd/trace-util.c | 31 +++++++++++++++++++++++++++++++ tracecmd/include/trace-local.h | 1 + tracecmd/trace-record.c | 1 + 4 files changed, 34 insertions(+) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 47fa463..6d50b08 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -441,6 +441,7 @@ void tracecmd_plog_error(const char *fmt, ...); int tracecmd_set_logfile(char *logfile); /* --- System --- */ +unsigned long long tracecmd_generate_traceid(void); int tracecmd_count_cpus(void); /* --- Hack! --- */ diff --git a/lib/trace-cmd/trace-util.c b/lib/trace-cmd/trace-util.c index ee6f48a..fdafbd6 100644 --- a/lib/trace-cmd/trace-util.c +++ b/lib/trace-cmd/trace-util.c @@ -18,6 +18,8 @@ #include #include #include +#include +#include #include "trace-cmd.h" #include "event-utils.h" @@ -1296,3 +1298,32 @@ error: tracecmd_put_tracing_file(path); return ret; } + +#define FNV_64_PRIME 0x100000001b3ULL +unsigned long long tracecmd_generate_traceid(void) +{ + unsigned long long hash = 0; + unsigned char *ustr; + struct sysinfo sinfo; + struct timespec ts; + char *str = NULL; + + clock_gettime(CLOCK_MONOTONIC_RAW, &ts); + sysinfo(&sinfo); + asprintf(&str, "%ld %ld %ld %ld %ld %ld %ld %ld %d", + ts.tv_sec, ts.tv_nsec, + sinfo.loads[0], sinfo.loads[1], sinfo.loads[2], + sinfo.freeram, sinfo.sharedram, sinfo.freeswap, + sinfo.procs); + if (!str) + return 0; + ustr = (unsigned char *)str; + hash = 0; + while (*ustr) { + hash ^= (unsigned long long)*ustr++; + hash *= FNV_64_PRIME; + } + + free(str); + return hash; +} diff --git a/tracecmd/include/trace-local.h b/tracecmd/include/trace-local.h index 51abef1..6203e0d 100644 --- a/tracecmd/include/trace-local.h +++ b/tracecmd/include/trace-local.h @@ -182,6 +182,7 @@ struct pid_addr_maps { struct buffer_instance { struct buffer_instance *next; struct tracecmd_instance *ftrace; + unsigned long long trace_id; char *cpumask; struct event_list *events; struct event_list **event_next; diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index a08ee52..70d75f6 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -5062,6 +5062,7 @@ void init_top_instance(void) top_instance.ftrace = tracecmd_create_instance(NULL); top_instance.cpu_count = tracecmd_count_cpus(); top_instance.flags = BUFFER_FL_KEEP; + top_instance.trace_id = tracecmd_generate_traceid(); tracecmd_init_instance(&top_instance); } -- 2.23.0