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{ "id": 2175487, "url": "http://patchwork.ozlabs.org/api/1.0/covers/2175487/?format=api", "project": { "id": 41, "url": "http://patchwork.ozlabs.org/api/1.0/projects/41/?format=api", "name": "GNU C Library", "link_name": "glibc", "list_id": "libc-alpha.sourceware.org", "list_email": "libc-alpha@sourceware.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<cover.1766051058.git.fweimer@redhat.com>", "date": "2025-12-18T10:17:02", "name": "[0/3] malloc: batched frees", "submitter": { "id": 14312, "url": "http://patchwork.ozlabs.org/api/1.0/people/14312/?format=api", "name": "Florian Weimer", "email": "fweimer@redhat.com" }, "series": [ { "id": 485815, "url": "http://patchwork.ozlabs.org/api/1.0/series/485815/?format=api", "date": "2025-12-18T10:17:02", "name": "malloc: batched frees", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/485815/mbox/" } ], "headers": { "Return-Path": "<libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "libc-alpha@sourceware.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "libc-alpha@sourceware.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=f3baPKHx;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=38.145.34.32; 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server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1766053028;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:mime-version:mime-version:content-type:content-type;\n bh=TiArBEQG/LmsHys7NlTPRhJjetZPiDTWn2H+YvPeg+Y=;\n b=f3baPKHxEWH9xfQCgMvLGoYuu2CWWrbL+4vDYoGlZN+fjTvIFPOtCu2DDF+4y1lkzodJNj\n JUT5sQBvU1ERUlZD+qoDR87VjLblhaEvqtJf/iGZjjjxaieWWm8+zaBnWaZAmloZNlf3Ar\n hcXfKAj4u+9jo7b40Fak8hDNL47MmP0=", "X-MC-Unique": "ZNxuIgOnP_KW8Zs7OJMkkA-1", "X-Mimecast-MFC-AGG-ID": "ZNxuIgOnP_KW8Zs7OJMkkA_1766053026", "From": "Florian Weimer <fweimer@redhat.com>", "To": "libc-alpha@sourceware.org", "Subject": "[PATCH 0/3] malloc: batched frees", "Message-ID": "<cover.1766051058.git.fweimer@redhat.com>", "X-From-Line": "1b9286461cc1b5980ffb5a025563f25872037e13 Mon Sep 17 00:00:00 2001", "Date": "Thu, 18 Dec 2025 11:17:02 +0100", "User-Agent": "Gnus/5.13 (Gnus v5.13)", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "mM_YwXWEP0vIs62Aa3v62qU1_LC_k77lPPu_EL-KHQQ_1766053026", "X-Mimecast-Originator": "redhat.com", "Content-Type": "text/plain", "X-BeenThere": "libc-alpha@sourceware.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Libc-alpha mailing list <libc-alpha.sourceware.org>", "List-Unsubscribe": "<https://sourceware.org/mailman/options/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=unsubscribe>", "List-Archive": "<https://sourceware.org/pipermail/libc-alpha/>", "List-Post": "<mailto:libc-alpha@sourceware.org>", "List-Help": "<mailto:libc-alpha-request@sourceware.org?subject=help>", "List-Subscribe": "<https://sourceware.org/mailman/listinfo/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=subscribe>", "Errors-To": "libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org" }, "content": "This series implements batched frees for malloc. They amortize the\nlocking overhead for frees once tcache is full.\n\nTested on x86_64-linux-gnu.\n\nFlorian Weimer (3):\n malloc: Perform batched frees if tcache is full\n malloc: Only fill half of the tcache during batch allocation\n malloc: Increase tcache fill count from 16 to 32\n\n malloc/malloc.c | 82 +++++++++++++++++++++++++++++++++++++++++--------\n 1 file changed, 69 insertions(+), 13 deletions(-)\n\n\nbase-commit: 9da0585852e5599ad6e849ccdf2f6f9b04038a3c" }