From: 김규래 <msca8h@naver.com>
To: "Jakub Jelinek" <jakub@redhat.com>
Cc: <gcc@gcc.gnu.org>
Subject: Re: Re: [GSoC'19, libgomp work-stealing] Task parallelism runtime
Date: Sat, 03 Aug 2019 09:12:00 -0000 [thread overview]
Message-ID: <ac16ab3c02b87c6fec8eed4b143862@cweb006.nm.nfra.io> (raw)
In-Reply-To: <d455e79784586d2cf8a713bd5ad7d86@cweb002.nm.nfra.io>
Hi,
I'm currently having trouble implementing the thread sleeping mechanism when the queue is out of tasks.
Problem is, it's hard to maintain consistency between the thread sleeping routine and the queues.
See the pseudocode below,
1. check queue is empty
2. go to sleep
if we go lock-free, the consistency between 1 and 2 cannot be maintained.
Moreover, if we go to a multi-queue setting, simply checking whether all the queues are empty is not consistent.
I would really like to have the thread sleeping mechanism but I'm not sure how we could do it.
Ray Kim
next prev parent reply other threads:[~2019-08-03 9:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <e2a9f7c55311795785d0f2c47f70acbd@cweb001.nm.nfra.io>
2019-06-24 19:55 ` 김규래
2019-06-24 20:13 ` Jakub Jelinek
2019-07-13 7:46 ` John Pinkerton
2019-07-09 12:56 ` 김규래
2019-07-13 6:28 ` Jakub Jelinek
2019-07-21 7:46 ` 김규래
2019-07-22 18:54 ` Jakub Jelinek
2019-07-22 19:00 ` 김규래
2019-08-03 9:12 ` 김규래 [this message]
2019-08-05 10:32 ` Jakub Jelinek
2019-08-05 11:01 ` 김규래
[not found] ` <20190819061020.GA27842@laptop.zalov.cz>
2019-08-25 7:49 ` 김규래
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ac16ab3c02b87c6fec8eed4b143862@cweb006.nm.nfra.io \
--to=msca8h@naver.com \
--cc=gcc@gcc.gnu.org \
--cc=jakub@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).