From patchwork Tue Aug 16 10:51:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lv Ruyi X-Patchwork-Id: 598019 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 DBE4AC25B0E for ; Tue, 16 Aug 2022 11:32:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234591AbiHPLcu (ORCPT ); Tue, 16 Aug 2022 07:32:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234594AbiHPLce (ORCPT ); Tue, 16 Aug 2022 07:32:34 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF01FC9251 for ; Tue, 16 Aug 2022 03:51:12 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id 73so8891551pgb.9 for ; Tue, 16 Aug 2022 03:51:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc; bh=dkLR8fLUAaEMxniDx/rOllCA2y+wrv1MyJ10xgDHyXs=; b=je2t0lBRccO0CZFPvmYYe0IawIh5rA/NUsFftbJAdVjvzp3nh1DtWrY4gDx66RwN4s HYarmuM9g1C4e7BFLf+TUQvI6FvsxXobHgPAgQrMzEYxXTRgtNptruNyns4szzQD0ZKI VXgc16WqUyTE5zfXrBuPcIW+gwPsG73TBQ5jxb1bsyn8nG5aFLWbDMCvmAS+TNUppMLE ByZB/1etSdsJ9qhy58qM8AMjypUWfy4dDotyUmECEG68/abU5x1Ue0HzanTV7YRrO5k+ 0IHaEO7OPdip1x80XQ4zF/WAyFYRdZY0/eaTxncr+Hm+vorqzrnMznwKuPzrxdzqSQ4x lrZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc; bh=dkLR8fLUAaEMxniDx/rOllCA2y+wrv1MyJ10xgDHyXs=; b=U+ISHRDU7EAbTyXU/dfF0u9CjcHZcZslItCWRX57SKFVNP3PrJBC1N3ZQ/QtqWD1t9 +jDxgdSwzO2pBSejCuNEdI0jYwwFVDz/4nlEOkPYfIOVEsmiEYuc6sSl8I/OotoeB80H PQop65dXvbCmjHD0CG0aOE4+R8VZDZZqY/49fmZGdJejBNq1PsbuQKa0wtgSZFmKJjT/ d8/HuIGELhZnwg/hjYliPTOhYUdOqU49GyVGv14AWLV6XhMVw++0cSG+wipB437gMJpY tx9FdsXYqHH5Q+PIDigT5Dd+G1fsx1Yt2gW3gXgVU/pG5bB4fKsesCRLwAVma22jI1G1 kfjg== X-Gm-Message-State: ACgBeo2d2F6AKva7dlYP2/rdCohT8QXfJn0/2UqKW+zjqicnvj1GNP2s 28IsvFVp0un37E8ZAGNrcYvxqFvV0jU= X-Google-Smtp-Source: AA6agR4k9yj/1XclGGrkEeI442gXbD5Zs9aCtj+m+d0HpDkDKyn40rFU5AuW79e476nNfIPNRQ9aOA== X-Received: by 2002:a05:6a00:e85:b0:52b:5db8:f3df with SMTP id bo5-20020a056a000e8500b0052b5db8f3dfmr20741399pfb.14.1660647072147; Tue, 16 Aug 2022 03:51:12 -0700 (PDT) Received: from localhost.localdomain ([193.203.214.57]) by smtp.gmail.com with ESMTPSA id c15-20020a170903234f00b0016d6c939332sm8717447plh.279.2022.08.16.03.51.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Aug 2022 03:51:11 -0700 (PDT) From: cgel.zte@gmail.com X-Google-Original-From: ye.xingchen@zte.com.cn To: mpe@ellerman.id.au Cc: npiggin@gmail.com, christophe.leroy@csgroup.eu, shuah@kernel.org, linux-kselftest@vger.kernel.org, ye xingchen , Zeal Robot Subject: [PATCH linux-next] powerpc/selftests:Use timersub() for gettimeofday() Date: Tue, 16 Aug 2022 10:51:06 +0000 Message-Id: <20220816105106.82666-1-ye.xingchen@zte.com.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: ye xingchen Use timersub() function to simplify the code. Reported-by: Zeal Robot Signed-off-by: ye xingchen --- tools/testing/selftests/powerpc/benchmarks/gettimeofday.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c index 6b415683357b..580fcac0a09f 100644 --- a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c +++ b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c @@ -12,7 +12,7 @@ static int test_gettimeofday(void) { int i; - struct timeval tv_start, tv_end; + struct timeval tv_start, tv_end, tv_diff; gettimeofday(&tv_start, NULL); @@ -20,7 +20,9 @@ static int test_gettimeofday(void) gettimeofday(&tv_end, NULL); } - printf("time = %.6f\n", tv_end.tv_sec - tv_start.tv_sec + (tv_end.tv_usec - tv_start.tv_usec) * 1e-6); + timersub(&tv_start, &tv_end, &tv_diff); + + printf("time = %.6f\n", tv_diff.tv_sec + (tv_diff.tv_usec) * 1e-6); return 0; }