Date: Fri, 03 Apr 1998 21:52:12 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: =?koi8-r?B?4c7E0sXKIP7F0s7P1w==?= <ache@nagual.pp.ru> Cc: "Alok K. Dhir" <adhir@worldbank.org>, current@FreeBSD.ORG, adkin003@tc.umn.edu Subject: Re: Working patch *with* splhigh() (Was Re: More info RE: X slowdown in -current) Message-ID: <3267.891633132@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 03 Apr 1998 23:32:42 %2B0400." <19980403233242.31917@nagual.pp.ru>
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>> So what exactly is the problem you're seing (any URLs I should try ?)
>
>You need no URLs, when Netscape4-communicator starts it draws its icon
>bar. With the bug it draws it at 1icon per 2secs rate.
Not for me :-(
>Next example is xterm scrolling, usually showed with 'ls -R'.
Not for me :-(
>When you move your mouse intensively, it helps to draw faster since
>generate more events. I use /dev/sysmouse (syscons mouse).
My xserver is remote, but it still doesn't make any difference :-(
>Something the picture locks completely until you touch mouse.
not here.
>> Does "systat :vm" show abnormally many syscalls ?
>
>I not check.
please do.
>> Does ktrace on your netscape show anything weird ?
>No.
>
>> Could it maybe be the Xserver which is having the trouble, not the
>> netscape process ?
>
>No, when I run Netscape remotely there is no slowness.
Dang.
I can't reproduce it here. I know the problem you describe, and I
specifically tested with netscape before I committed 1.35 :-(
The problem is that time must somehow become zero when we reach
tsleep() where it should have been non-zero. I'd be damned if I
can see how that can happen.
The code looks like this:
s = splhigh();
if (term && term <= ticks) {
splx(s);
goto done;
}
timo = term ? term - ticks : 0;
The splhigh location is important btw, to protect against just this
problem (ie, ticks changing between the two uses of it.)
Anybody else see this problem with version 1.35 ?
BTW: The current code is not really what I plan on, but I'm hashing
some ideas out right now with Bruce, which might be even better than
the code I have running here right now...
--
Poul-Henning Kamp FreeBSD coreteam member
phk@FreeBSD.ORG "Real hackers run -current on their laptop."
"Drink MONO-tonic, it goes down but it will NEVER come back up!"
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