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Groups > comp.lang.c++ > #119687
| From | "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Signalling a condvar from inside and outside a locked mutex |
| Date | 2024-07-19 21:43 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <v7ff91$3ctsi$1@dont-email.me> (permalink) |
| References | <v7e43f$32fh1$1@raubtier-asyl.eternal-september.org> <v7ebp7$33rg9$1@dont-email.me> <yNymO.118293$ySE.17714@fx11.iad> |
On 7/19/2024 12:05 PM, Scott Lurndal wrote: > "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes: >> On 7/19/2024 9:26 AM, Bonita Montero wrote: >> [...] >>> >>> outside: 19937 >>> inside: 20030 100.471% >>> >>> Result: locking from inside and outside is as efficient with >>> Linux and glibc, only half a percent more contextswitches >>> with locking from inside. >> >> Well, wait morphing should have something to do with it. ;^) >> >> Generally, signalling a condvar while the mutex is locked is not all >> that efficient... > > > One cannot draw any conclusions from that toy example. It really > depends on what percentage of the time there is contention on the > mutex, how many waiters there are on average and the maturity of the > host thread scheduler. Right. It can be tested under simulated and/or recorded real load. I used to do this in some of my older server code.
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Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-19 18:26 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-19 11:37 -0700
Re: Signalling a condvar from inside and outside a locked mutex scott@slp53.sl.home (Scott Lurndal) - 2024-07-19 19:05 +0000
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-20 06:34 +0200
Re: Signalling a condvar from inside and outside a locked mutex scott@slp53.sl.home (Scott Lurndal) - 2024-07-20 14:30 +0000
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-20 20:24 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-20 12:01 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-20 21:22 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-20 12:50 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-21 08:46 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-21 13:12 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-22 06:59 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-22 12:12 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-23 05:58 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-25 11:24 -0700
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-19 21:43 -0700
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-19 21:45 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-20 10:04 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-24 17:23 -0700
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-24 17:36 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-20 06:33 +0200
Re: Signalling a condvar from inside and outside a locked mutex Marcel Mueller <news.5.maazl@spamgourmet.org> - 2024-07-21 14:14 +0200
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-21 14:19 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-21 13:08 -0700
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-21 13:07 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-22 07:00 +0200
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-22 07:17 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-22 12:13 -0700
Re: Signalling a condvar from inside and outside a locked mutex Bonita Montero <Bonita.Montero@gmail.com> - 2024-07-23 10:39 +0200
Re: Signalling a condvar from inside and outside a locked mutex "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-07-23 12:49 -0700
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