From: Jan Kiszka <jan.kiszka@domain.hid>
To: GUARDIOLA-FALCO Sebastien 204282 <Sebastien.GUARDIOLA-FALCO@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] PPC posted results (testsuite latency)
Date: Thu, 10 Aug 2006 19:10:15 +0200 [thread overview]
Message-ID: <44DB6877.6010702@domain.hid> (raw)
In-Reply-To: <1299EF3181B10F479D85C3280132852422DAF1@domain.hid>
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GUARDIOLA-FALCO Sebastien 204282 wrote:
> Hi,
>
> Here are the results for a PowerPC MVME2700 267Mhz (32Mo RAM + 1024kb L2-cache).
> Can someone cross-check them?
>
> The default value for the kernel parameter "scheduling latency" led me to negative results, so I changed it to 4500ns. Can I improve those results with another walue, or with other parameters?
> For the klatency test, I get more or less the half time I get in latency.
>
> == Sampling period: 100 us
> == All results in microseconds
> RTT| 00:00:01
> RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst
> RTD| 1.859| 3.239| 6.179| 0| 1.859| 6.179
> RTD| 2.159| 3.239| 13.559| 0| 1.859| 13.559
> ...
Looks quite good, maybe too good. Did you load your box? See
TROUBLESHOOTING for some hints on this. Also let it run for a longer period.
Jan
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next prev parent reply other threads:[~2006-08-10 17:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-10 17:03 [Xenomai-help] PPC posted results (testsuite latency) GUARDIOLA-FALCO Sebastien 204282
2006-08-10 17:10 ` Jan Kiszka [this message]
2006-08-11 7:43 ` GUARDIOLA-FALCO Sebastien 204282
2006-08-11 8:14 ` Wolfgang Grandegger
2006-08-23 7:24 ` [Xenomai-help] how to port to xenomai GUARDIOLA-FALCO Sebastien 204282
2006-08-23 7:52 ` Philippe Gerum
2006-08-23 12:16 ` Gilles Chanteperdrix
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