From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/5901 Path: news.gmane.org!not-for-mail From: Jens Gustedt Newsgroups: gmane.linux.lib.musl.general Subject: Re: Multi-threaded performance progress Date: Tue, 26 Aug 2014 09:04:14 +0200 Message-ID: <1409036654.4835.14.camel@eris.loria.fr> References: <20140826034321.GA13999@brightrain.aerifal.cx> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-ASuZRl6u3uNfR+/C73R9" X-Trace: ger.gmane.org 1409036676 20547 80.91.229.3 (26 Aug 2014 07:04:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 26 Aug 2014 07:04:36 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-5907-gllmg-musl=m.gmane.org@lists.openwall.com Tue Aug 26 09:04:31 2014 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from 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Cj15cu23XZI4/826Px/xqB37z547sPH374oOvnKTsOb+1zuCoImZARM8ZiLlKkXcWOcoFRJ+Do/CwFO4e2DEe+9Ti+ZXA8ny/cU+X4bMKRZxZIVEiqXI6/+NKuUzPHb7z40ovnX3zx+Ctuq38HyuqWG7Tu+A0AAAAASUVORK5CYII= X-Mailer: Evolution 3.4.4-3 Xref: news.gmane.org gmane.linux.lib.musl.general:5901 Archived-At: --=-ASuZRl6u3uNfR+/C73R9 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Am Montag, den 25.08.2014, 23:43 -0400 schrieb Rich Felker: > This release cycle looks like it's going to be huge for multi-threaded > performance issues. So far the cumulative improvement on my main > development system, as measured by the cond_bench.c by Timo Ter=E4s, is > from ~250k signals in 2 seconds up to ~3.7M signals in 2 seconds. > That's comparable to what glibc gets on similar hardware with a cond > var implementation that's much less correct. The improvements are a > result of adding private futex support, redesigning the cond var > implementation, and improvements to the spin-before-futex-wait > behavior. Very impressive! > We're near the end of my planned time frame for this release cycle, > but I'm still interested in working with Jens to get C11 threads into > this release if possible, so I'll probably extend it for a while > still. I would be very much in favor of getting C11 in one version or another into the current release, as you said. In any case, it would be good if we could claim support for C11 for that release. That would be another item where musl could claim to be first, at least before glibc. There is not much missing, I think. Come to mind: - one or two simple functions, such as the timespec_get that I posted - if we don't have C11 threads the feature test macro __STDC NO_THREAD__ - perhaps some other feature test macros for unsupported features Jens --=20 :: INRIA Nancy Grand Est ::: AlGorille ::: ICube/ICPS ::: :: ::::::::::::::: office Strasbourg : +33 368854536 :: :: :::::::::::::::::::::: gsm France : +33 651400183 :: :: ::::::::::::::: gsm international : +49 15737185122 :: :: http://icube-icps.unistra.fr/index.php/Jens_Gustedt :: --=-ASuZRl6u3uNfR+/C73R9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEABECAAYFAlP8MW4ACgkQD9PoadrVN+I92gCggi58t3KLaRuRrjInbIcszb6l f9QAn3IrVX0kZVGFTnFaExee2ih7ezIL =mYBZ -----END PGP SIGNATURE----- --=-ASuZRl6u3uNfR+/C73R9--