From patchwork Wed Jun 5 16:06:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Wagner X-Patchwork-Id: 165909 Delivered-To: patch@linaro.org Received: by 2002:a92:9e1a:0:0:0:0:0 with SMTP id q26csp7548112ili; Wed, 5 Jun 2019 09:06:38 -0700 (PDT) X-Google-Smtp-Source: APXvYqzR4PhdD0332rn/PuO71EnG7+atFykq/2k4mcbcTVvAbl4wiSgFPyo4mAEbxjwkGzp2iyQ4 X-Received: by 2002:a63:224c:: with SMTP id t12mr5544854pgm.227.1559750797950; Wed, 05 Jun 2019 09:06:37 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1559750797; cv=none; d=google.com; s=arc-20160816; b=lqdhvU1tNMB/c/DpNpqNVvCdC2m//Viydh1iPM+RUDxw4WDTPUphBuKSP5ThEPHQlW ok/xh9k67nApCm4BQxMbidn+z8J2Kv93hdT4S0kTjuQl/etD5AVljGdoMO69b/oU6E7o E5xb0zS9jGMWaQGV54i2WnUjlgciIv+s/8yomfsiaengEC4p992ZqeJztV8+A/2bPSBf iqC8/fIHv+NW8s3dFFYzVS4fw+Ve7iDALuSEVaNlOhvJ4bw0DKS2J+L3VYiaiTaZLcCG wDiiGRr9cHFHzu84RqKk//FkYpm94lFenmv7jtn+oQrDV89Gfjz3JtZu6jKsn7eOZauW Pfhg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=ZBvLSRPu/cNRLg804NC/Ip05OvKFXTJDrvLs7Usw6fo=; b=VPDdSK1RdG3rC+HAkFoGmEMYSaUijMuBOmBOtALt2HJOgn0oRXBoLyNL3LprJQwUPZ OQ4NGDCwCoi9c/wv5nTXcAZXVtjg/YmPdgKU1ezdHwA1pi1ZIlrLmjkbOjOxyKiYl2Oj MZX5zA3MHYUS+FoFexJCPMM0NYkVzsrjVby1CtXmEyeDaxodhobhe0WKsh9L9c9wWqJX WRMRh4OjVv20VtsyPWrFEySRsAOl+w1mU+8q4XH8uyGuFwEzbCDYQQuiY+fzfvMPzKIy +Dz2OfyWpXJmZPTBN9CAyDDMV97272EW9eA+hOgxHo1FCzU9+sUHZYVN5hM2VWYo4Rj1 7d1A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-rt-users-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-rt-users-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=monom.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q6si27364257pgm.101.2019.06.05.09.06.37; Wed, 05 Jun 2019 09:06:37 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-rt-users-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-rt-users-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-rt-users-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=monom.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728624AbfFEQGg (ORCPT + 3 others); Wed, 5 Jun 2019 12:06:36 -0400 Received: from mail.monom.org ([188.138.9.77]:35598 "EHLO mail.monom.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726829AbfFEQGc (ORCPT ); Wed, 5 Jun 2019 12:06:32 -0400 Received: from mail.monom.org (localhost [127.0.0.1]) by filter.mynetwork.local (Postfix) with ESMTP id 28F3E5006C0; Wed, 5 Jun 2019 18:06:30 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mail.monom.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham autolearn_force=no version=3.4.2 Received: from localhost (ppp-93-104-174-142.dynamic.mnet-online.de [93.104.174.142]) by mail.monom.org (Postfix) with ESMTPSA id E54EA5004BB; Wed, 5 Jun 2019 18:06:29 +0200 (CEST) From: Daniel Wagner To: John Kacur Cc: linux-rt-users@vger.kernel.org, Daniel Wagner Subject: [PATCH v2 02/12] queuelat: Use clock syscall for ARM 32 bit Date: Wed, 5 Jun 2019 18:06:07 +0200 Message-Id: <20190605160617.22987-3-wagi@monom.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190605160617.22987-1-wagi@monom.org> References: <20190605160617.22987-1-wagi@monom.org> MIME-Version: 1.0 Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org CPUs such as Cortex-M8 don't have a rdtsc instruction. Fallback using a syscall. Signed-off-by: Daniel Wagner --- src/queuelat/queuelat.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) -- 2.20.1 Signed-off-by: John Kacur diff --git a/src/queuelat/queuelat.c b/src/queuelat/queuelat.c index 3b291f168768..a5525e41776a 100644 --- a/src/queuelat/queuelat.c +++ b/src/queuelat/queuelat.c @@ -7,6 +7,7 @@ #include #include #include +#include #define NSEC_PER_SEC 1000000000 @@ -249,6 +250,8 @@ typedef unsigned long long cycles_t; typedef unsigned long long usecs_t; typedef unsigned long long u64; +#if defined __x86_64__ || defined __i386__ + #ifdef __x86_64__ #define DECLARE_ARGS(val, low, high) unsigned low, high #define EAX_EDX_VAL(val, low, high) ((low) | ((u64)(high) << 32)) @@ -270,7 +273,25 @@ static inline unsigned long long __rdtscll(void) return EAX_EDX_VAL(val, low, high); } -#define rdtscll(val) do { (val) = __rdtscll(); } while (0) +#define gettick(val) do { (val) = __rdtscll(); } while (0) + +#elif defined __arm__ + +static inline unsigned long long __clock_gettime(void) +{ + struct timespec now; + int ret; + + ret = clock_gettime(CLOCK_MONOTONIC, &now); + if (ret < 0) + return 0; + + return now.tv_nsec; +} + +#define gettick(val) do { (val) = __clock_gettime(); } while (0) + +#endif static void init_buckets(void) { @@ -348,9 +369,9 @@ static void run_n(int n) memmove(dest, src, n); for (i = 0; i < loops; i++) { - rdtscll(b); + gettick(b); memmove(dest, src, n); - rdtscll(a); + gettick(a); delta = (a - b) * cycles_to_ns; account(delta); } @@ -446,9 +467,9 @@ void main_loop(void) int ret; int nr_packets_fill; - rdtscll(b); + gettick(b); memmove(dest, src, default_n); - rdtscll(a); + gettick(a); delta = (a - b) * cycles_to_ns; account(delta);