From: John Ogness <john.ogness@linutronix.de>
To: Angelo Dureghello <angelo@kernel-space.org>,
linux-rt-users@vger.kernel.org
Subject: Re: big rt latencies compared to non rt
Date: Tue, 11 May 2021 22:14:34 +0200 [thread overview]
Message-ID: <87im3p6n9x.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <736a53fb-d80e-3faa-1a66-d40538e0fe26@kernel-space.org>
Hi Angelo,
On 2021-05-11, Angelo Dureghello <angelo@kernel-space.org> wrote:
> cyclictest --duration=180 -t=1 -m -Sp99 \
> -i2000 -h3000 -q > histogram
>
> Average is near 16uS but there are some outside
> values near 40000, as
The first column is the latency in microseconds. The other columns
(2nd-5th) is the count of times that latency was seen for a CPU.
> 000009 000000 000000 000000 000000
> 000010 000001 000000 000002 000000
> 000011 000002 000000 000000 000000
> 000012 000023 000006 000008 000004
> 000013 001565 001504 002010 001367
> 000014 000425 001959 000649 000700
> 000015 001447 001917 001129 001415
> 000016 034084 026118 040328 032334
> 000017 040537 015000 033773 041092 <-----
CPU3 saw a latency of 17us 41092 times.
John Ogness
next prev parent reply other threads:[~2021-05-11 20:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 16:00 big rt latencies compared to non rt Angelo Dureghello
2021-05-11 19:50 ` Jonathan Schwender
2021-05-11 20:14 ` John Ogness [this message]
2021-05-11 20:19 ` Angelo Dureghello
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