From nobody Thu Nov 9 18:08:53 2023 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4SR91x5ctCz50mZs for ; Thu, 9 Nov 2023 18:08:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4SR91x4Zqxz4bbd for ; Thu, 9 Nov 2023 18:08:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1699553333; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=exyAGwKTZr5zD2OyODlChpqqLZF9Cltx4Wy2tSMg51k=; b=R0nxA99s08Bae7Nv3Y+lVZEX1Ov0EQcqiXiRB8s2hhMxLvqK5eSaqNWexTXhrVFI6uhavV eDCJx/WBs+Nf5lfxibY7lKQxUoKrL2rmbNq8XKagYj6TH13aYvFZXq4MiAnINnoIeMPEip g5eUaZ3Xe09LvngiK0lMS+Mp/kGyJE8jaY4TrG0el9n+yrNTzIWRfrKg+0AE04DE/fQbyu dyBto1Uhq81J/RQoXua1XR0fQ54lMqMkBWHXcnTaxcHzWg1f8yMXKYPf7wbtpp3pihuUWH 84VXTgVHmdiN8iboe1NI64UyOARCV7gL4gjBKQxM7bMjMOGZinNRMnIIyNEadQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1699553333; a=rsa-sha256; cv=none; b=U5/kESC76+Me5Ni66pSjRv7M6dnR/dcfXS0D+x9oqYWp543Awuo+jozeGk6kZ41zINrv8n LfSgNMv3d10o5Sf1degWqv6hxTrKOHBqdA+dARPpAuo4pGYDz+T09tKe31VD1En2VE3u5K bOJ32y9U/bGX1lBwjIayqoo50u4UiBY/4V/AcNLMr7UhHwtAfuYkAPN2akQeWcTOHq6wxT aux9tHPXPKcxQ349DfMa03Rl/p1VQwEkz3gTzLwG/6xrlWCatrwHQTMLbObmn3REyBTKiL 65f5+22PS0XxjVok+pVEHBv8NmNepGpXT8KZAFAczitNJHHo8oJwdfh+BBB/VQ== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4SR91x3gXmzBFk for ; Thu, 9 Nov 2023 18:08:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 3A9I8rdT078849 for ; Thu, 9 Nov 2023 18:08:53 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 3A9I8rwW078848 for bugs@FreeBSD.org; Thu, 9 Nov 2023 18:08:53 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 274994] Regression of iperf3 network throughput tests with erms "rep movsb" copyto loops Date: Thu, 09 Nov 2023 18:08:53 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D274994 --- Comment #1 from Richard Scheffenegger --- (Just to make it clear, there were essentially loopback tests within the sa= me system, and the absolute values matter less than the relative comparison between the tests with the erms rep movsb vs. hand-rolled loops. Even on the one platform which is most recent, the hand-rolled loop was still appreciable faster over the rep movsb in this test... Since this is rather unexpected, an independent confirmation of these relat= ive results on a plain hardware platform running MAIN with and without the patch to effectively collapse copyin to the nosmap_std routing would be highly=20 appreciated. --=20 You are receiving this mail because: You are the assignee for the bug.=