From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Ran Shalit <ranshalit@gmail.com>
Cc: linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: Can jitter also be smaller than amount of time or only bigger ?
Date: Wed, 29 Nov 2017 17:33:26 +0100 [thread overview]
Message-ID: <20171129163326.GA7707@linutronix.de> (raw)
In-Reply-To: <CAJ2oMhLh0V0k1Awf5OM-FKmMB7Ex9=D+CtVxZv+cr0MgNR5n9Q@mail.gmail.com>
On 2017-11-27 18:25:23 [+0200], Ran Shalit wrote:
> Hello,
Hi,
> When using rt linux, does it mean that the jitter is in both direction
> or only bigger than amount of time for wait ?
> For example, if we set periodic timer for 1msec, can it also be that
> we get the interrupt before the 1msec period ended ?
With or without RT: the timer must not fire too early. I can fire
_after_ the 1ms deadline but never before that.
> Thank you.
> Ran
Sebastian
prev parent reply other threads:[~2017-11-29 16:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 16:25 Can jitter also be smaller than amount of time or only bigger ? Ran Shalit
2017-11-29 16:33 ` Sebastian Andrzej Siewior [this message]
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