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Date: Sat, 17 Jan 2009 12:49:25 +0000 From: James Courtier-Dutton <James@...erbug.co.uk> To: Jussi Laako <jussi@...arnerd.net> CC: Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu> Subject: Re: [RFC][PATCH] Multimedia scheduling class Jussi Laako wrote: > Peter Zijlstra wrote: >> Well, that's not my problem is it ;-), just batter them with a >> clue-stick, no need to fudge the kernel for that. > > Sure, been doing that already... :) > There's just sort of a huge gap between rt-schedulers and the normal > scheduler. > >> Right, which is where deadline scheduling would be nice. Once you start >> running into the budget throttle you know you've got to start dropping >> frames in order to keep up. >> >> The proposal is for it to start sending SIGXCPU once it starts >> throttling tasks in order to notify them of missed deadlines etc. > > For sure this is nice for certain tasks. I'm not entirely convinced if > the average media player or Flash-plugin would or should start using these. > There is never a need for media players to use this. Media players have time stamps on the displayed frames. If the timestamp on a frame indicates it has taken too long to decode it, the media player just skips the frame until it reaches frames that have non-expired time stamps. No need for any kernel help here. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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