From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 10 Aug 2006 19:10:15 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] PPC posted results (testsuite latency)
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To: GUARDIOLA-FALCO Sebastien 204282 <Sebastien.GUARDIOLA-FALCO@domain.hid>
Cc: xenomai@xenomai.org

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GUARDIOLA-FALCO Sebastien 204282 wrote:
> Hi,
>=20
> Here are the results for a PowerPC MVME2700 267Mhz (32Mo RAM + 1024kb L=
2-cache).
> Can someone cross-check them?
>=20
> The default value for the kernel parameter "scheduling latency" led me =
to negative results, so I changed it to 4500ns. Can I improve those resul=
ts with another walue, or with other parameters?
> For the klatency test, I get more or less the half time I get in latenc=
y.
>=20
> =3D=3D Sampling period: 100 us
>  =3D=3D 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 peri=
od.

Jan


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