Here's another strange bug, also found during TigerVNC Xvnc testing. On
Ubuntu 9.04 beta[*], after starting GNOME, Xvnc consumes all CPU it can
get. An strace indicates:
time(NULL) = 1240494241
setitimer(ITIMER_REAL, {it_interval={0, 20000}, it_value={0, 20000}}, NULL) = 0
gettimeofday({1240494241, 713782}, NULL) = 0
gettimeofday({1240494241, 713837}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
gettimeofday({1240494241, 714036}, NULL) = 0
select(256, [0 1 3 4 5 6 7 9 10 11 12 13 14 15 16 18 19 21 25 26], NULL, NULL,
{0, 0}) = 0 (Timeout)
gettimeofday({1240494241, 714176}, NULL) = 0
Since the nfds argument is 256, this is most likely a select() invocation
with FD_SETSIZE. As far as I can tell, there's no such call in the VNC
specific parts of Xvnc, so the select call is most likely in generic Xorg
code.
[*]: Actually, it doesn't matter if Xvnc itself is running on Ubuntu or
not. The problem also happens when Xvnc is running on some other platform
and X11 forward is used: The trigger seems to be the Ubuntu version of
GNOME.
Seen before?
Regards,
---
Peter Åstrand ThinLinc Chief Developer
Cendio AB http://www.cendio.com
Wallenbergs gata 4
583 30 Linköping Phone: +46-13-21 46 00
------------------------------------------------------------------------------
Stay on top of everything new and different, both inside and
around Java (TM) technology - register by April 22, and save
$200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco.
300 plus technical and hands-on sessions. Register today.
Use priority code J9JMT32. http://p.sf.net/sfu/p
_______________________________________________
Tigervnc-devel mailing list
Tigervnc-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/tigervnc-devel
