Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: comp.lang.c++
Subject: Re: signalling a condvar from inside vs. signalling a condvar von
 outside
Date: Sat, 12 Apr 2025 12:33:57 -0700
Organization: A noiseless patient Spider
Lines: 17
Message-ID: <vtef76$16guv$1@dont-email.me>
References: <vte0g6$pmgv$1@raubtier-asyl.eternal-september.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Sat, 12 Apr 2025 21:33:58 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="982b471ae5e1b9b1e6a8cd05faa3439d";
	logging-data="1262559"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19VeUaVOzNqO2bWPE4I9ahbHN29Afq8Pno="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:thb7E56kWTQSZA29U+v1TNdhADA=
Content-Language: en-US
In-Reply-To: <vte0g6$pmgv$1@raubtier-asyl.eternal-september.org>
Bytes: 1617

On 4/12/2025 8:23 AM, Bonita Montero wrote:
[...]
> It nearly doesn't matter in terms of numbers of context switches if
> you  signal a condvar from inside our outside. The above program run
> on a Zen4-CPU with WSL2:
> 
>      inside: 20130
>      outside: 19811
> 
> On a 28 core Skylake-CPU with Ubuntu:
> 
>      inside: 19997
>      outside: 19888
> 

There is a scalability problem wrt signalling inside the critical 
section. Does your convdar impl use wait morphing?