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Re: Enabling interrupt latency measurement.
- From: Gary Thomas <gary at chez-thomas dot org>
- To: Christer Kaivo-oja <christer dot kaivo at kvaser dot se>
- Cc: eCos Discussion <ecos-discuss at sources dot redhat dot com>
- Date: 24 Jun 2002 09:05:57 -0600
- Subject: Re: [ECOS] Enabling interrupt latency measurement.
- References: <20020624145313.9F3F47DA@hermes.chez-thomas.org>
On Mon, 2002-06-24 at 08:53, Christer Kaivo-oja wrote:
> Hi.
>
> I'm trying to get a reading on the interrupt latency of a platform port I'm
> developing. I've gotten the tm_basic kernel test to run, but it doesn't
> include the interrupt latency number..
>
> The platform port is based on the assabet (Intel SA1110 cpu), and the getting
> started document lists interrupt latency for the assabet, so it should work
> on this platform too..
>
> Anyone have any ideas on how to enable it?
Set these CDL variables:
CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
CYGVAR_KERNEL_COUNTERS_CLOCK_DSR_LATENCY
and the numbers will be computed/printed
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