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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/63400] [C++11]precision of std::chrono::high_resolution_clock
Date: Thu, 14 Jul 2022 18:19:47 +0000	[thread overview]
Message-ID: <bug-63400-4-XFRvofiNo2@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-63400-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63400

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to frankhb1989 from comment #4)
> With mingw-w64, the following program shows that the monotonic clock is far
> more precise:
> 
> #include <pthread_time.h>
> #include <iostream>
> 
> int main()
> {
> 	using namespace std;
> 	timespec ts;
> 
> 	if(clock_getres(CLOCK_REALTIME, &ts) == 0)
> 		cout << "CLOCK_REALTIME: " << ts.tv_sec << ',' << ts.tv_nsec << endl;
> 	if(clock_getres(CLOCK_MONOTONIC, &ts) == 0)
> 		cout << "CLOCK_MONOTONIC: " << ts.tv_sec << ',' << ts.tv_nsec << endl;
> }
> 
> The result on my machine:
> 
> CLOCK_REALTIME: 0,15625000
> CLOCK_MONOTONIC: 0,489

Is this still an issue in 2022?

Using a mingw-w64 cross-compiler and running under Wine I get:

CLOCK_REALTIME: 0,100
CLOCK_MONOTONIC: 0,100

Is that just because I'm using Wine not real Windows?

  parent reply	other threads:[~2022-07-14 18:19 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-63400-4@http.gcc.gnu.org/bugzilla/>
2014-09-29  9:33 ` redi at gcc dot gnu.org
2014-09-29 17:18 ` redi at gcc dot gnu.org
2014-09-29 21:00 ` frankhb1989 at gmail dot com
2014-09-29 21:03 ` frankhb1989 at gmail dot com
2014-09-30 10:36 ` redi at gcc dot gnu.org
2022-07-14 18:17 ` redi at gcc dot gnu.org
2022-07-14 18:19 ` redi at gcc dot gnu.org [this message]
2022-07-15 10:37 ` redi at gcc dot gnu.org
2024-03-08 10:21 ` redi at gcc dot gnu.org
2024-03-08 10:21 ` redi at gcc dot gnu.org
2024-03-08 11:41 ` redi at gcc dot gnu.org
2024-03-08 13:47 ` vz-gcc at zeitlins dot org
2024-03-08 14:37 ` redi at gcc dot gnu.org
2024-03-08 14:38 ` redi at gcc dot gnu.org
2024-03-08 15:03 ` vz-gcc at zeitlins dot org

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