From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 2B8D63857C43; Fri, 9 Oct 2020 12:55:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2B8D63857C43 From: "segher at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/97329] POWER9 default cache and line sizes appear to be wrong Date: Fri, 09 Oct 2020 12:55:25 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: segher at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Oct 2020 12:55:26 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97329 --- Comment #8 from Segher Boessenkool --- The default -mcpu=3D for a compiler targeting powerpc64le-linux is normally power8 (you can change this with the --with-cpu=3D configure option though). -mcpu=3Dpowerpc64le is also (currently) equal to -mcpu=3Dpower8. But the numbers for Power8 (in power8_cost) are wrong it seems: it has a 64kB L1-D cache, and a 512kB L2 cache (it looks like we have simply copied the Power7 numbers here; 32 and 256 is correct for Power7).=