On Sat, 16 Jan 1999, Brandon S. Allbery KF8NH wrote:
> In message <19990116204908.A1473@tantalophile.demon.co.uk>, Jamie Lokier
> writes
> :
> +-----
> | On Fri, Jan 15, 1999 at 09:35:46PM -0600, Joseph Anthony wrote:
> | > Every thing is ok with me (pre7) Netscape 4.08
> | > Debian 2.0
> |
> | I have checked, the problem is still present with Netscape 4.08.
> | (netscape-navigator-4.08-1.i386.rpm as distributed by Red Hat).
> |
> | Further tracing reveals that the regular, high speed SIGALRM signals are
> | quite normal -- netscape receives them all the time. It sets a timer
> | requesting them every 50ms, though it only receives them every 70ms.
> +--->8
>
> FWIW, I see the following on both 4.05 Solaris and 4.08 Linux: occasionally
> Netscape "freezes", and forcing it to receive an X event (usually by moving
> the mouse into or out of its frame, since I run with backing store)
> unfreezes it. Sometimes this must be repeated a few times before it notices.
>
> This along with your report makes me think that Netscape is doing something
> *really* stupid such as internal preemptive multitasking with the pipe
> feeding a scheduler routine which looks to see what requested scheduling by
> writing to the pipe and dispatches with longjmp() or abuse of throw/catch.
> The possible failure modes, if anything doesn't work exactly as the
> author(s) predicted, are mind-boggling.
>
> So pre7 does something Netscape doesn't quite expect --- it may well be
> *valid*, just not what they tuned the above monstrosity for on Linux --- and
> Netscape goes into a tailspin. Surprise.
>
> I always wondered how they simulated multithreading. Somehow I think I now
> know... it seems just about repulsive enough to fit :-)
>
> --
> brandon s. allbery [os/2][linux][solaris][japh] allbery@kf8nh.apk.net
> system administrator [WAY too many hats] allbery@ece.cmu.edu
> carnegie mellon / electrical and computer engineering KF8NH
> We are Linux. Resistance is an indication that you missed the point.
>
>
--- It has recently been discovered that research causes cancer in laboratory rats. ************************************* * Joseph Anthony * * jga@cowboy.net * * http://wasteland.cowboy.net * * ------------------------------- * * System Administrator Cowboy.net * * http://www.cowboy.net * *************************************
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