This is the mail archive of the
guile-gtk@sources.redhat.com
mailing list for the Guile project.
bug in threading implementation, using guile-1.6.1
- From: Stan Pinte <alto_stan at wanadoo dot be>
- To: guile-user <guile-user at gnu dot org>
- Cc: guile-gtk <guile-gtk at sources dot redhat dot com>
- Date: Tue, 31 Dec 2002 13:44:24 +0100
- Subject: bug in threading implementation, using guile-1.6.1
- Organization: Alto Software
- Reply-to: alto_stan at wanadoo dot be
hello,
I am using multiple threads within a guile-gtk application.
a call to (gtk-threads-ensure-handler) ensures that a first thread gets started, and
allows the rest of my program to execute. At the end of that program, I call (gtk-main), to
wait in the Gtk event thread.
If I run my program without starting a second thread, it is ok, but as soon as I invoke
(gtk-threads-ensure-handler), my CPU is used at 100%
NOTES:
1: I configured guile-1.6.1 using the "--with-threads" flag.
2: if I strace my process, I see this:
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 454970}, NULL) = 0
gettimeofday({1041338430, 455055}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 455767}, NULL) = 0
gettimeofday({1041338430, 455852}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 456429}, NULL) = 0
gettimeofday({1041338430, 456511}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 457084}, NULL) = 0
gettimeofday({1041338430, 457166}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 459008}, NULL) = 0
gettimeofday({1041338430, 459097}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
gettimeofday({1041338430, 459688}, NULL) = 0
gettimeofday({1041338430, 459771}, NULL) = 0
ioctl(7, FIONREAD, [0]) = 0
select(32, [6 7], [], [], {0, 0}) = 1 (in [6], left {0, 0})
and so on....
--> I suspect a bug in the implementation of
coop_wait_for_runnable_thread () in libguile/isselect.c
if (QFIRST (coop_global_sleepq)->timeoutp)
gettimeofday (&now, NULL);
return coop_wait_for_runnable_thread_now (&now);
...
thanks a lot,
Stan
--
Stanislas Pinte
Computer Consultant
Alto Software
20 Pl St Jacques
B-4000 Liège
web: http://www.altosw.be
email: alto_stan@wanadoo.be