From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 465A4386EC51; Mon, 12 Oct 2020 09:36:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 465A4386EC51 From: "amonakov at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/97203] [nvptx] 'illegal memory access was encountered' with 'omp simd'/SIMT and cexpf call Date: Mon, 12 Oct 2020 09:36:03 +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: openmp, wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: amonakov at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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: Mon, 12 Oct 2020 09:36:03 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97203 --- Comment #8 from Alexander Monakov --- No, -msoft-stack-reserve-local is really meant to be in bytes: it may not exceed the amount of .local memory reserved by CUDA driver (which is just 1= -2 KB, unless overridden via cuCtxSetLimit, which nvptx-run.c does, but plugin-nvptx.c does not). Keep in mind that .local memory reservation is multiplied by number of acti= ve contexts, which could be in range 20000-30000 when the code was written: 12= 8KB local memory per active thread would imply a 2.5GB allocation on the GPU.=