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From: Greg KH <greg@kroah.com>
To: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: high precision timers
Date: Sun, 2 May 2021 16:54:45 +0200	[thread overview]
Message-ID: <YI69NawQQbRHW838@kroah.com> (raw)
In-Reply-To: <CAB=+i9SMKUXeOhFFydZLzHXxLPJmpwpsKARt6gTrPk2_3AKnRw@mail.gmail.com>

On Sun, May 02, 2021 at 11:10:11PM +0900, Hyeonggon Yoo wrote:
> the 'timer wheel' - which has low resolution works at jiffy resolution.
> so usually it has precision of 1~10ms.
> 
> and there's high resolution timers in kernel to have nanosecond resolution,
> but it doesn't seem to have nanosecond precision
> 
> is there a way to deal with high precision timers in kernel?

What exactly are you needing here?  And do you have hardware that
provides both high precision and high resolution?

thanks,

greg k-h

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  reply	other threads:[~2021-05-02 14:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-02 14:10 high precision timers Hyeonggon Yoo
2021-05-02 14:54 ` Greg KH [this message]
     [not found]   ` <CAB=+i9TRO_KUMuHb5ozwQqXjoRKV+4+JtgQEdrgNh-eK1vivBA@mail.gmail.com>
2021-05-03 11:13     ` Valdis Klētnieks
     [not found]       ` <CAB=+i9RVEvEBJVYz-MkMAtZHhsNbr4a88CCVmjkpQ4WevWWxkQ@mail.gmail.com>
2021-05-03 15:15         ` loïc tourlonias

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