From owner-freebsd-bugs@freebsd.org Fri May 22 18:23:38 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 932642D8784 for ; Fri, 22 May 2020 18:23:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 49TFHG3Rdgz4gBM for ; Fri, 22 May 2020 18:23:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 744862D8634; Fri, 22 May 2020 18:23:38 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 740D62D83F4 for ; Fri, 22 May 2020 18:23:38 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49TFHG2WXSz4gGZ for ; Fri, 22 May 2020 18:23:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) 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 37DE923005 for ; Fri, 22 May 2020 18:23:38 +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 04MINce4076044 for ; Fri, 22 May 2020 18:23:38 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 04MINcFa076043 for bugs@FreeBSD.org; Fri, 22 May 2020 18:23:38 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 246630] stable/11 regression: base.txz reproducibility depends on number of cpu cores Date: Fri, 22 May 2020 18:23:37 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: Unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: cem@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 MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 May 2020 18:23:38 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246630 --- Comment #7 from Conrad Meyer --- Diff seems to start here (I reordered lines for clarity): =E2=94=82 @@ -63992,183658 +63992,183673 @@ ... =E2=94=82 - 43c7b5: 49 89 cd mov %rcx,%r13 =E2=94=82 + 43c7b5: 49 89 cf mov %rcx,%r15 // ^^ r13 -> r15 =E2=94=82 - 43c7b8: 49 29 c5 sub %rax,%r13 =E2=94=82 + 43c7b8: 49 29 c7 sub %rax,%r15 =E2=94=82 - 43c7bb: 4c 89 ec mov %r13,%rsp =E2=94=82 + 43c7bb: 4c 89 fc mov %r15,%rsp ... =E2=94=82 - 43c803: 4c 63 c2 movslq %edx,%r8 =E2=94=82 + 43c803: 4c 63 da movslq %edx,%r11 // ^^ r8 -> r11 =E2=94=82 - 43c806: 49 c1 e0 03 shl $0x3,%r8 =E2=94=82 + 43c806: 49 c1 e3 03 shl $0x3,%r11 =E2=94=82 - 43c80a: 4c 03 05 e7 7a bc 00 add 0xbc7ae7(%rip),%r8 = # 0x10042f8 =E2=94=82 + 43c80a: 4c 03 1d e7 7a bc 00 add 0xbc7ae7(%rip),%r11 = # 0x10042f8 =E2=94=82 - 43c811: 4c 89 05 d0 7a bc 00 mov %r8,0xbc7ad0(%rip) = # 0x10042e8 =E2=94=82 + 43c811: 4c 89 1d d0 7a bc 00 mov %r11,0xbc7ad0(%rip) = # 0x10042e8 =E2=94=82 - 43c818: 4c 3b 05 d1 7a bc 00 cmp 0xbc7ad1(%rip),%r8 = # 0x10042f0 =E2=94=82 + 43c818: 4c 3b 1d d1 7a bc 00 cmp 0xbc7ad1(%rip),%r11 = # 0x10042f0 =E2=94=82 43c81f: 76 07 jbe 0x43c828 =E2=94=82 - 43c821: 4c 89 05 c8 7a bc 00 mov %r8,0xbc7ac8(%rip) = # 0x10042f0 =E2=94=82 + 43c821: 4c 89 1d c8 7a bc 00 mov %r11,0xbc7ac8(%rip) = # 0x10042f0 These particular changes are not the ones that affect code *size* (those mu= st be later), but do show reproducibility problems. --=20 You are receiving this mail because: You are the assignee for the bug.=