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 F40203858412 for ; Tue, 26 Jul 2022 22:42:50 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org F40203858412 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-I1k7fzyzPrKZY2sdBBC2bw-1; Tue, 26 Jul 2022 18:42:49 -0400 X-MC-Unique: I1k7fzyzPrKZY2sdBBC2bw-1 Received: by mail-oa1-f71.google.com with SMTP id 586e51a60fabf-10dc4d7e989so6331701fac.21 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=ijUkkP8pXQYElJ+fDLDG50DW8xT1sKuXpdNLma1rZuXG3hnlSU9PfB+Q5iPDIlnaiY sSTjQg1DQZf2S2Z0zcNA86PqHWlTVxQqNm1Cq6pYoNEp0omSE7mKWv8aoaozPzzFhNxO r1I2cFKr2F41+ImVQRRGhWswO+6RGR1/Gb/7H5Su0FC8m3QkXHArlygF6JTlXH/2YAPV BpAKQCq46YUBKcSHPAZ3NxwbYiWoqo4JC6VXdgDxQQRDA7EucLLp7hW/2I6lFRS6paMw 0/58FzqATJ7g8PR3Gv/Zh8wP8Ocrd6A1MZpKb/jKrbqwRuHFjHat9ZaD4eQnq1Vq2TIo Mdxw== X-Gm-Message-State: AJIora9b2kU0M7kvJJPIxxQsSQZvr0WhUdzZTUYuyI+LoSEskLsba0N2 UUucWwSYh2HtJUusm57Zrxwv6cjmv+pee+kM//v/TOj/XD//hlBLeTQwrGS95BwILbPMlEOA3Qf j/tL29Vis0IYF3ZbGphPjEXQRpxSOSnCBEA== X-Received: by 2002:a05:6830:2707:b0:61c:c565:d72f with SMTP id j7-20020a056830270700b0061cc565d72fmr7118166otu.101.1658875368541; 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=-6.2 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=unavailable 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: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches 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. > >> > >