From: Thomas Schwinge <thomas@codesourcery.com>
To: Chung-Lin Tang <cltang@codesourcery.com>
Cc: <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts
Date: Mon, 17 Dec 2018 13:56:00 -0000 [thread overview]
Message-ID: <yxfpefagtfxl.fsf@hertz.schwinge.homeip.net> (raw)
In-Reply-To: <95e55969-db17-06f6-a67a-98806b25b664@mentor.com>
Hi Chung-Lin!
On Fri, 14 Dec 2018 22:42:28 +0800, Chung-Lin Tang <chunglin_tang@mentor.com> wrote:
> On 2018/12/14 10:32 PM, Thomas Schwinge wrote:
> > Invoked as "acc_wait_async ([...], acc_async_sync)" (as used in a test
> > case that I'll soon submit/commit), we'll end up with "aq2 == NULL", and
> > will segfault in the nvptx "openacc.async.serialize_func".
>
> What does "wait async(acc_async_sync)" supposed to mean?
In my understanding, that'll translate to just "wait" without an "async"
clause, thus synchronous with the local (host) thread.
> Instead of fixing
> it here, will it make more sense to have the serialize_func hook to accommodate
> the NULL asyncqueue?
Sure, that may make sense, yes. Right: if there's no asyncqueue to
serialize with, then serialize/synchronize with the local (host) thread.
Grüße
Thomas
next prev parent reply other threads:[~2018-12-17 13:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-25 13:11 Chung-Lin Tang
2018-12-07 11:33 ` Thomas Schwinge
2018-12-07 14:19 ` Chung-Lin Tang
2018-12-14 14:11 ` Thomas Schwinge
2018-12-14 14:17 ` Thomas Schwinge
2018-12-14 14:52 ` Chung-Lin Tang
2018-12-17 13:52 ` Thomas Schwinge
2018-12-18 9:35 ` Chung-Lin Tang
2018-12-14 14:32 ` Thomas Schwinge
2018-12-14 14:42 ` Chung-Lin Tang
2018-12-17 13:56 ` Thomas Schwinge [this message]
2018-12-14 14:54 ` Thomas Schwinge
2018-12-14 15:01 ` Chung-Lin Tang
2018-12-17 14:11 ` Thomas Schwinge
2018-12-14 14:56 ` Thomas Schwinge
2018-12-17 11:03 ` Chung-Lin Tang
2018-12-17 14:32 ` Thomas Schwinge
2018-12-18 10:03 ` Chung-Lin Tang
2018-12-18 11:44 ` Thomas Schwinge
2018-12-18 15:06 ` [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts (revised, v2) Chung-Lin Tang
2018-12-18 21:04 ` Thomas Schwinge
2018-12-21 16:25 ` [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts (revised, v3) Chung-Lin Tang
2018-12-28 14:52 ` Thomas Schwinge
2019-01-02 12:46 ` [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts (revised, v2) Chung-Lin Tang
2019-01-05 9:47 ` [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts (revised, v4) Chung-Lin Tang
2019-01-07 14:16 ` Thomas Schwinge
2019-01-08 14:04 ` Chung-Lin Tang
2019-01-07 14:15 ` [PATCH 2/6, OpenACC, libgomp] Async re-work, oacc-* parts (revised, v2) Thomas Schwinge
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