From patchwork Wed Aug 11 20:01:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 44645 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 568E5398582C for ; Wed, 11 Aug 2021 20:03:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 568E5398582C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1628712191; bh=J85rNnccvNCLb0xeKziSy//VzaEzhlRMHKMmDxmHye0=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:Cc:From; b=mgJNla6NP0tL0juIqOoXIJZuWPPAzfno69RtKrMNdvF6Pb0KqHNn3H3usx1lLykTu jkesHkm873zIWf42NAkO+HsN8xxZqJvD+qb4K+cud3DS9Q+Apv7f6ZtaX+dAjlRdxC vPpVYgh95lD7Lq+P3QodgQT3/rdralOaiGPiVbFM= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by sourceware.org (Postfix) with ESMTPS id 68CD9386482A for ; Wed, 11 Aug 2021 20:01:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 68CD9386482A Received: by mail-pl1-x62e.google.com with SMTP id e15so4129315plh.8 for ; Wed, 11 Aug 2021 13:01:38 -0700 (PDT) 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:mime-version :content-transfer-encoding; bh=J85rNnccvNCLb0xeKziSy//VzaEzhlRMHKMmDxmHye0=; b=j7nQlSKGeIzvf9u+11t8QxkfDkb8QZag/8Re4qRDEOOsqwP80iSamGkBXWloVtEMsj z2cwiOY4rBtV2kOXKIOMQmHXNIge0YFpxvg1DdW+lUEl1L3Spqm5paJQRgukDv5w2Pb3 RXVlt91vXENhAUa8L2KYaNiOxZCz++gk8czkvGoc5GbLcr2mU4ZSThBMJXSscUKZCzvg UvPJ0ppS/YXtowC/SeRCi6kmKnBqDBPbHqlUw5bCa1bCYvFAaY8dPYR0tDK7O3LCkyf8 RrrIiJTekLv6r3kxz5/5tXFUi4lE6GDCykPLRuiPXq/tXnacw1zqbVRvt8n1T3XG9/LN iOpg== X-Gm-Message-State: AOAM533DwAH+EWCUmafltkITV5MNspoFJp13e2l2rA0k5seLGSQ9ZWlY 5WMxmHL/mARxtm0q6H31H+6EMU+Fz42HnQ== X-Google-Smtp-Source: ABdhPJxD3w63LCCsarqWA70uqHdjvXBBskY0v8md6R0sadb2knZ2tIzIw2y0uvkQwCBVXwdChrhVJw== X-Received: by 2002:a63:da44:: with SMTP id l4mr364023pgj.405.1628712097246; Wed, 11 Aug 2021 13:01:37 -0700 (PDT) Received: from birita.. ([2804:431:c7cb:9dce:70f4:4f7a:652c:7fb]) by smtp.gmail.com with ESMTPSA id r15sm281370pjl.29.2021.08.11.13.01.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Aug 2021 13:01:36 -0700 (PDT) To: libc-alpha@sourceware.org Subject: [PATCH 0/4] Add CLOCK_MONOTONIC support for PI mutexes Date: Wed, 11 Aug 2021 17:01:29 -0300 Message-Id: <20210811200133.3869287-1-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Spam-Status: No, score=-6.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Cc: Kurt Kanzenbach Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" This patchset is a respin from previous set [1] with some code simplification and tests refactor. As before, it add support for CLOCK_MONOTONIC for PI mutexes by using the new Linux v5.14 FUTEX_LOCK_PI2 operation. Similar to current approach, pthread_mutex_clocklock might return EINVAL if the underlying kernel has no support for the futex operation. Changes since v1: * Refactor futex_lock_pi64 and avoid adding futex_lock_pi2. The FUTEX_LOCK_PI2 logic is done at only one place, so the code change on pthread routines are minimal. Also, FUTEX_LOCK_PI2 is only used if it is really required, i.e, when a timeout against CLOCK_MONOTONIC is used. * Do not remove nptl/tst-mutexpi10.c, but instead adjust it to new FUTEX_LOCK_PI2 support. * Add pthread_mutex_pi_support_monotonic() to check if monotonic clock with PI mutexes are supported and use on test to check for the expected result. [1] https://patchwork.sourceware.org/project/glibc/list/?series=2372 Adhemerval Zanella (3): nptl: Use FUTEX_LOCK_PI2 when available support: Add xpthread_mutex_pi_support_monotonic nptl: Add CLOCK_MONOTONIC support for PI mutexes Kurt Kanzenbach (1): Linux: Add FUTEX_LOCK_PI2 nptl/futex-internal.c | 63 +++++++++++++++++++ nptl/pthread_mutex_lock.c | 3 +- nptl/pthread_mutex_timedlock.c | 10 +-- nptl/tst-mutexpi10.c | 42 ++++++++----- support/Makefile | 1 + support/xpthread_mutex_pi_support_monotonic.c | 33 ++++++++++ support/xthread.h | 4 ++ sysdeps/nptl/futex-internal.h | 54 +--------------- sysdeps/nptl/lowlevellock-futex.h | 1 + sysdeps/pthread/tst-mutex5.c | 23 ++++--- sysdeps/pthread/tst-mutex9.c | 20 +++--- sysdeps/unix/sysv/linux/kernel-features.h | 8 +++ 12 files changed, 170 insertions(+), 92 deletions(-) create mode 100644 support/xpthread_mutex_pi_support_monotonic.c