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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/104688] gcc and libatomic can use SSE for 128-bit atomic loads on Intel and AMD CPUs with AVX
Date: Wed, 15 Feb 2023 16:07:46 +0000	[thread overview]
Message-ID: <bug-104688-4-xgQpsF35jv@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-104688-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104688

--- Comment #32 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #31)
> Yes, there was a user who incorrectly used memcpy on non-memory memory.
From what I remember (it was also reported about aarch64 at one point too), one
of the graphics libraries would call memcpy from normal memory to GPU Memory
(over PCIe) and memcpy will sometimes use unaligned accesses which causes a
fault to the GPU memory.

  parent reply	other threads:[~2023-02-15 16:07 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-25 14:22 [Bug target/104688] New: gcc and libatomic can use SSE for 128-bit atomic loads on Intel " xry111 at mengyan1223 dot wang
2022-02-25 14:30 ` [Bug target/104688] " jakub at gcc dot gnu.org
2022-02-25 14:33 ` xry111 at mengyan1223 dot wang
2022-02-25 14:34 ` fw at gcc dot gnu.org
2022-02-25 16:36 ` jakub at gcc dot gnu.org
2022-02-25 16:37 ` jakub at gcc dot gnu.org
2022-03-17 17:50 ` cvs-commit at gcc dot gnu.org
2022-03-29  5:54 ` cvs-commit at gcc dot gnu.org
2022-04-05 12:30 ` xry111 at mengyan1223 dot wang
2022-04-05 12:35 ` jakub at gcc dot gnu.org
2022-11-14  3:31 ` Ganesh.Gopalasubramanian at amd dot com
2022-11-14  4:58 ` sam at gentoo dot org
2022-11-14  5:10 ` [Bug target/104688] gcc and libatomic can use SSE for 128-bit atomic loads on Intel and AMD " xry111 at gcc dot gnu.org
2022-11-14  7:54 ` jakub at gcc dot gnu.org
2022-11-14  9:24 ` amonakov at gcc dot gnu.org
2022-11-14  9:29 ` jakub at gcc dot gnu.org
2022-11-14  9:52 ` amonakov at gcc dot gnu.org
2022-11-15  7:18 ` cvs-commit at gcc dot gnu.org
2022-11-15  7:20 ` jakub at gcc dot gnu.org
2022-11-20 23:11 ` cvs-commit at gcc dot gnu.org
2022-11-21  9:23 ` cvs-commit at gcc dot gnu.org
2022-11-23  9:18 ` xry111 at gcc dot gnu.org
2022-11-23  9:51 ` jakub at gcc dot gnu.org
2022-11-23 10:23 ` xry111 at gcc dot gnu.org
2022-11-28 18:35 ` peter at cordes dot ca
2022-11-28 18:46 ` amonakov at gcc dot gnu.org
2022-11-28 19:03 ` peter at cordes dot ca
2022-11-28 20:11 ` amonakov at gcc dot gnu.org
2022-11-28 20:47 ` peter at cordes dot ca
2022-11-29  8:11 ` fw at gcc dot gnu.org
2023-02-15 12:27 ` segher at gcc dot gnu.org
2023-02-15 12:46 ` fw at gcc dot gnu.org
2023-02-15 16:03 ` segher at gcc dot gnu.org
2023-02-15 16:07 ` pinskia at gcc dot gnu.org [this message]
2023-02-15 16:09 ` segher at gcc dot gnu.org

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