From: Ingo Molnar <mingo@chiara.csoma.elte.hu>
To: linux-sound@vger.kernel.org
Subject: Re: Low-latency patches working GREAT (<2.9ms audio latency), see testresults ,but ISDN troubles
Date: Sun, 29 Aug 1999 07:22:24 +0000 [thread overview]
Message-ID: <marc-linux-sound-93591157728770@msgid-missing> (raw)
In-Reply-To: <marc-linux-sound-93586766006172@msgid-missing>
On Sat, 28 Aug 1999, Benno Senoner wrote:
> - The disk performance decreases by 10-25% when I increase the CPU load
> in the "latencytest" bench. (On light CPU load there are no disk
> performance differences, maybe this is related to higher scheduling
> overhead)
just in case anyone misunderstood the above result (as i think many did).
The 'CPU load' mentioned above is a _realtime process_ (unless Benno you
changed the benchmark). This is a _good_ result. 'increase CPU load'
simply means 'generate more RT load' - which in _this case_ might mean
less disk performance - but the RT task asked for it in the first place.
All in one: i can see no problem here.
if a 'simple' CPU-user (non-RT) is getting more active there is no
slowdown.
-- mingo
next prev parent reply other threads:[~1999-08-29 7:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-08-28 19:14 Low-latency patches working GREAT (<2.9ms audio latency), see testresults ,but ISDN troubles Benno Senoner
1999-08-29 7:22 ` Ingo Molnar [this message]
1999-08-29 21:51 ` Benno Senoner
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