From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] mouse cursor madness
Date: Mon, 15 Apr 2013 15:23:31 -0400 [thread overview]
Message-ID: <e4006fa5ed21180cd123bbdabb82d70a@ladd.quanstro.net> (raw)
In-Reply-To: <1a1b983d25524afdc837ffc669ef14e3@rei2.9hal>
On Mon Apr 15 14:37:00 EDT 2013, cinap_lenrek@gmx.de wrote:
> i found it not to be a big deal to just redraw the cursor without
> any delay. this is usualy very quick anyway. the only exception
> is when another process holds onto the drawlock for a long
> time because of some expensive operation (poly drawing). and in
> that case, the cursor draw process will be queued on the drawlock and
> will be scheduled right after the other process releases the lock.
i find i get a lot of flicker (and unnecessary delay) when
scrolling text quickly.
try
echo scroll>/dev/wctl
time cat /sys/src/9/port/*
and hz does matter because the sleep in mouse proc
may be woken a minimum rate of hz*nproc.
so for the system i'm working on, i think one could get 8000hz
(or more) cursor redraws per second after your change.
before the maximum rate was 30.
- erik
next prev parent reply other threads:[~2013-04-15 19:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-14 17:16 cinap_lenrek
2013-04-15 17:28 ` erik quanstrom
2013-04-15 17:35 ` cinap_lenrek
2013-04-15 19:23 ` erik quanstrom [this message]
2013-04-15 19:27 ` cinap_lenrek
2013-04-15 21:03 ` erik quanstrom
2013-04-15 20:01 ` erik quanstrom
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