From: Lukas Hejtmanek <xhejtman@hell.sks3.muni.cz>
To: Peter Osterlund <petero2@telia.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ACPI problems (was: Re: Synaptics PS/2 driver and 2.6.0-test11)
Date: Tue, 30 Dec 2003 02:01:45 +0100 [thread overview]
Message-ID: <20031230010145.GM916@mail.muni.cz> (raw)
In-Reply-To: <m21xqngmyw.fsf@telia.com>
On Tue, Dec 30, 2003 at 01:37:11AM +0100, Peter Osterlund wrote:
> That's normal. The hardware generates 80 packets/second and it keeps
> generating packets 1 second after you stop using the touchpad. Each
> packet is 6 bytes and the i8042 controller generates one
> interrupt/byte.
>
> 500 interrupts/s shouldn't be any problem to handle though.
Well it depends. If ACPI disables interrupts or it keeps some spin lock then
there is a high probability that some interrupts are lost.
If I do (with no load nor i/o stress):
# time cat /proc/acpi/battery/BAT0/state
present: yes
capacity state: ok
charging state: unknown
present rate: unknown
remaining capacity: 4000 mAh
present voltage: 14800 mV
real 0m1.118s
user 0m0.001s
sys 0m0.007s
However for me it looks odd that sound is not corrupted (and I believe
that dma buffer does not hold 1 sec of sound data) while serio and soft modem
is.
--
Lukáš Hejtmánek
prev parent reply other threads:[~2003-12-30 1:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-29 21:59 ACPI problems (was: Re: Synaptics PS/2 driver and 2.6.0-test11) Lukas Hejtmanek
2003-12-30 0:37 ` Peter Osterlund
2003-12-30 1:01 ` Lukas Hejtmanek [this message]
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