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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 046D4C433B4 for ; Mon, 12 Apr 2021 14:29:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BF2FB61353 for ; Mon, 12 Apr 2021 14:29:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240862AbhDLO3f (ORCPT ); Mon, 12 Apr 2021 10:29:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240002AbhDLO3f (ORCPT ); Mon, 12 Apr 2021 10:29:35 -0400 Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B8B0C061574 for ; Mon, 12 Apr 2021 07:29:17 -0700 (PDT) Received: by mail-ed1-x52a.google.com with SMTP id h10so15307111edt.13 for ; Mon, 12 Apr 2021 07:29:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:subject:message-id:mime-version:content-disposition; bh=0P5czINXRSmWUgVMy5hfECS3abHGtTdsAjIIm1UbVF8=; b=tihgRsGp00+tTlKCLZNB4FmVBtZapHn8VBUlJNQ/Y4kP+9kTsqYE+J4oi4r7KyKqSF Q0Iy67q2fgFBxDdsX60zuHJukxfGR15tyBPeSGJVU+qNMVFs2S2iUSWbDhD5+kUjyRyg OeREK4f5TsWexOQnMGL/Dqbynr2ebhJ1wpbKoqvcCZ/extNjuFjXlPPNEwH00SDBn1VB 3unVnZCRKSLi59oKTvG5F8eCNlAhHlTFH2I78ygaV7HyixIff9ANSgfbp+ES0YGFY4o7 MEnLeQFphAwvJNGD6q1AoM4xfOQHFaORbL2i9qP0qJGaVVaz6Pb3PT3778gxdzVUpc+U Ms7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:mime-version :content-disposition; bh=0P5czINXRSmWUgVMy5hfECS3abHGtTdsAjIIm1UbVF8=; b=Hi6zfp/qdElgdCJybZijCJjR8as7lHQUyVT8lfqg+JUj0MXzNJD/GGU0rgEMW7ylMm S7zhmcxvchJDJ2tfIo6Mszp+yc3OfajxWLPj4eDYwpkiCQsskisOWJg62Nzj8HHqA5Qo z+1DB+xooaw/pxARwkwd1J4oT/KuNIDAD9zvtqzZfGIbEMbdobhhJNQPDK6EH7ogirvx /pP/5RkxqWofOf3EDvWntvSzUBYSSFvnQG5VceQ+7aJWTGPkw3G5FxZdnRUm5QHZamrU EIyU74rCQCcVHJ+00nLqM+bmSfwY7zZQGTPCdULp2g4ixcXjwR52YkooJk9dFkJ7nlnT fg7g== X-Gm-Message-State: AOAM532VvCwwjTr3nHDDu0lkn9nlatLnVwZwKxj681AXmWc5NQQE9e2q 32F4yeyW7Wq5Sn1r/uBNlcGLSkvJqw== X-Google-Smtp-Source: ABdhPJxzCcgjO5CfgUf6Kn2nUDiipBu0UW5V2mXJ2D1yqMzIGyIFv/hkJ2ADGTVP71iFO4DZK0dBNA== X-Received: by 2002:a05:6402:1d3a:: with SMTP id dh26mr21669957edb.359.1618237756056; Mon, 12 Apr 2021 07:29:16 -0700 (PDT) Received: from localhost.localdomain ([46.53.249.61]) by smtp.gmail.com with ESMTPSA id bu26sm1919636ejb.30.2021.04.12.07.29.15 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Apr 2021 07:29:15 -0700 (PDT) Date: Mon, 12 Apr 2021 17:29:13 +0300 From: Alexey Dobriyan To: linux-perf-users@vger.kernel.org Subject: Double sys_exit_pread64 tracepoint event Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org I was tracing trivial fio workload which does pread in 4 threads on 4 different CPUs and got double exit event: fio 7371 [000] 5670.259136: syscalls:sys_enter_pread64: fd: 0x00000007, buf: 0x7f2c4c001000, count: 0x00001000, pos: 0x075c1000 fio 7371 [000] 5670.259167: syscalls:sys_exit_pread64: 0x1000 fio 7371 [000] 5670.259167: syscalls:sys_exit_pread64: 0x1000 ***** fio 7371 [000] 5670.259169: syscalls:sys_enter_pread64: fd: 0x00000007, buf: 0x7f2c4c001000, count: 0x00001000, pos: 0x075c2000 fio 7371 [000] 5670.259199: syscalls:sys_exit_pread64: 0x1000 Is this supposed to happen every once in a while?