From patchwork Thu Apr 21 14:38:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Yu X-Patchwork-Id: 12821144 X-Patchwork-Delegate: lenb@kernel.org 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2AF2AC433EF for ; Thu, 21 Apr 2022 06:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347021AbiDUGlv (ORCPT ); Thu, 21 Apr 2022 02:41:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229641AbiDUGlu (ORCPT ); Thu, 21 Apr 2022 02:41:50 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3998DDFC7; Wed, 20 Apr 2022 23:39:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1650523141; x=1682059141; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=tRiylTZEyGnmok4xZrcOLzssYSLSFxbagoPYNhTAEf0=; b=mxCJ1lxe9kcd0nqdUx/OeRoNxhhhvF6w6AemfjmAsu4/qvsjkcFpVMkv rOGxCM8N+BtvOO1H0cPytPQd/WhIDBcBNhiBGLiDl4RXH1r+WHLPEDvSX vV7vZ368kzbdocbeLRhb8Z8uiIjogbBVtdGr3p0ypDEg2kr9Q5d2R/NMk AckkMjStM2QUCZ6Q9jd4GfR+ygEZ0zzE5d87Z2/bzgM5iyLhmRXEyOAZA S8Xv5N162XAVhkhyZEsjTDjkVQzg0zokSuHdrgmMW5BxcAYXogjjhvQ/t q7Oe0Hm6PFOXs95bH5ppNejCMEoTi7kbBl4XKbmZy0pENBbhdFLr90Jgm A==; X-IronPort-AV: E=McAfee;i="6400,9594,10323"; a="251569452" X-IronPort-AV: E=Sophos;i="5.90,278,1643702400"; d="scan'208";a="251569452" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2022 23:39:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,278,1643702400"; d="scan'208";a="670043379" Received: from chenyu-dev.sh.intel.com ([10.239.158.170]) by orsmga004.jf.intel.com with ESMTP; 20 Apr 2022 23:38:59 -0700 From: Chen Yu To: Len Brown Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Chen Yu , Artem Bityutskiy Subject: [PATCH] tools/power turbostat: print the kernel boot commandline Date: Thu, 21 Apr 2022 22:38:34 +0800 Message-Id: <20220421143834.627841-1-yu.c.chen@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org It would be handy to have cmdline in turbostat output. For example, according to the turbostat output, there are no C-states requested. In this case the user is very curious if something like intel_idle.max_cstate=0 was used, or may be idle=none too. It is also curious whether things like intel_pstate=nohwp were used. Print the boot command line accordingly: turbostat version 21.05.04 - Len Brown Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.16.0+ root=UUID= b42359ed-1e05-42eb-8757-6bf2a1c19070 ro quiet splash vt.handoff=7 Suggested-by: Artem Bityutskiy Signed-off-by: Chen Yu --- tools/power/x86/turbostat/turbostat.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index bc5ae0872fed..bfcb6345510b 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -5976,6 +5976,29 @@ void print_version() fprintf(outf, "turbostat version 21.05.04" " - Len Brown \n"); } +#define COMMAND_LINE_SIZE 2048 + +void print_bootcmd(void) +{ + char bootcmd[COMMAND_LINE_SIZE]; + FILE *fp; + int ret; + + memset(bootcmd, 0, COMMAND_LINE_SIZE); + fp = fopen("/proc/cmdline", "r"); + if (!fp) + return; + + ret = fread(bootcmd, sizeof(char), COMMAND_LINE_SIZE - 1, fp); + if (ret) { + bootcmd[ret] = '\0'; + /* the last character is already '\n' */ + fprintf(outf, "Kernel command line: %s", bootcmd); + } + + fclose(fp); +} + int add_counter(unsigned int msr_num, char *path, char *name, unsigned int width, enum counter_scope scope, enum counter_type type, enum counter_format format, int flags) @@ -6425,8 +6448,10 @@ int main(int argc, char **argv) outf = stderr; cmdline(argc, argv); - if (!quiet) + if (!quiet) { print_version(); + print_bootcmd(); + } probe_sysfs();