From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 00728385841D for ; Tue, 26 Jul 2022 22:42:50 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 00728385841D Received: from mail-oa1-f71.google.com (mail-oa1-f71.google.com [209.85.160.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-674-mUrmk46HNOOIM3kc49ezPA-1; Tue, 26 Jul 2022 18:42:49 -0400 X-MC-Unique: mUrmk46HNOOIM3kc49ezPA-1 Received: by mail-oa1-f71.google.com with SMTP id 586e51a60fabf-10d96293e14so8488743fac.22 for ; Tue, 26 Jul 2022 15:42:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=fm1a9702N+ZsqyQa8yF01aYsxSCzlmsFUdU+xCM+CFg=; b=si3kskW/yKhbSM6ukERCDIpgDHcOt/jgaCMwneUYjmNMdv60UvEEj7Xnandegpv4yh oXYXRgrI2uvYCJhA6xg1LjtUeRbuE07heJCpOLEW76LbgmihTQjY9obOnfybqBvzNKV5 COULKi1LR3OTSMzS2wPYCd7WOywF5HIjxZSc2LYIQf1iNLdYAfao8688Sx4wlGPkZ3LX e+97kECnjKrCzokqdIPN64h/nb2NmwLrBQZEKPdPK2foOEBjTDd3FezxWBKhD71n6NQL zrSUXU0y4hyn7t9Gnmf0omJoRv8T+xv51/qg6d1yI7RjtUof9mNqDYPVvuW9lwX0vip8 n8Zw== X-Gm-Message-State: AJIora87j9dzJkkXnLZB3+kzddhvR6qan/I1Ygw2UpiUovDV/qI00wCO uBgvdARQ5KdGYI6cml+xRt/Ztltpe2dms0KvTqyrrY5gIQ8Rjd4mQ2zqpFsmOTH2al7aBCxXvGd c54HE4GUbLuZFJS/p8DKgrtQgBEsMyq4= X-Received: by 2002:a05:6830:2707:b0:61c:c565:d72f with SMTP id j7-20020a056830270700b0061cc565d72fmr7118167otu.101.1658875368569; Tue, 26 Jul 2022 15:42:48 -0700 (PDT) X-Google-Smtp-Source: AGRyM1u4PXylIQkU82dQ0mBSqVoNF2x+2aTmt4M3CVMRslODdflZArZOlNqtAL96JqxDppNYdrgesOSInauI1opjE74= X-Received: by 2002:a05:6830:2707:b0:61c:c565:d72f with SMTP id j7-20020a056830270700b0061cc565d72fmr7118163otu.101.1658875368345; Tue, 26 Jul 2022 15:42:48 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Thomas Rodgers Date: Tue, 26 Jul 2022 15:42:37 -0700 Message-ID: Subject: Re: libstdc++: Minor codegen improvement for atomic wait spinloop To: Jonathan Wakely Cc: "libstdc++" , gcc Patches X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-6.4 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, HTML_MESSAGE, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jul 2022 22:42:52 -0000 This is now committed to trunk, backported to releases/gcc-12 and releases/gcc-11. Apologies for the delay, it's been a wild couple of weeks. Tom. On Thu, Jul 7, 2022 at 2:31 AM Jonathan Wakely wrote: > On Wed, 6 Jul 2022 at 22:42, Thomas Rodgers wrote: > > > > Ok for trunk? backport? > > Yes, for all branches that have the atomic wait code. > > > > > > On Wed, Jul 6, 2022 at 1:56 PM Jonathan Wakely > wrote: > >> > >> On Wed, 6 Jul 2022 at 02:05, Thomas Rodgers via Libstdc++ > >> wrote: > >> > > >> > This patch merges the spin loops in the atomic wait implementation > which is > >> > a > >> > minor codegen improvement. > >> > > >> > libstdc++-v3/ChangeLog: > >> > * include/bits/atomic_wait.h (__atomic_spin): Merge spin > loops. > >> > >> OK, thanks. > >> > >