Date: 10 Nov 1995 03:45:48 +0800 From: peter@haywire.dialix.com (Peter Wemm) To: freebsd-hackers@freebsd.org Subject: Re: Timing bug with Netscape 2.0b2 Message-ID: <47tlpc$r3k$1@haywire.DIALix.COM> References: <Pine.AUX.3.91.951107132105.27090B-100000@covina.lightside.com>, <199511080128.SAA18699@phaeton.artisoft.com>
next in thread | previous in thread | raw e-mail | index | archive | help
terry@lambert.org (Terry Lambert) writes:
>> Is this another FreeBSD-emulating-BSDI bug with Netscape 2.0b2:
>>
>> Any graphic that is supposed to be updated regularly (blinking cursor,
>> animated Netscape icon, or blinking tags in text) will not update when I
>> run Netscape 2.0b2 in FreeBSD... UNLESS either:
>>
>> 1) The mouse is in motion (and then it updates slowly) OR
>> 2) There is network activity (Netscape is currently downloading a page).
>>
>> I'm sure this is affecting everyone, right?
>I believe this is another select() timeout/itimer interaction.
>Has anyone looked at BSDI's default siginterrupt/syscall restart
>options since the last time we talked about this?
I've been examinging some rather large ktrace dumps. The BSD version
of netscape 2.0b2 does not use the itimer system calls. :-(
It's actually blocking inside a select without a timeout:
[ ..... 5 Megs of ktrace/kdump deleted ..... ]
279 netscape.bin RET gettimeofday 0
279 netscape.bin CALL select(0xd,0xefbfc1c8,0xefbfc1a8,0xefbfc188,0xefbfc08c)
279 netscape.bin RET select 0
279 netscape.bin CALL gettimeofday(0xefbfbfe8,0)
279 netscape.bin RET gettimeofday 0
279 netscape.bin CALL sigprocmask(0x1,0)
279 netscape.bin RET sigprocmask 0
279 netscape.bin CALL sigprocmask(0x3,0)
279 netscape.bin RET sigprocmask 0
279 netscape.bin CALL select(0xd,0x50011f5c,0,0x50011f1c,0)
^^^
Note that no timeout is being selected.
Also, it does not siginterrupt, and does not call any itimer functions.
This looks like a netscape programming error.
-Peter
> Terry Lambert
> terry@lambert.org
>---
>Any opinions in this posting are my own and not those of my present
>or previous employers.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?47tlpc$r3k$1>