Firefox + Xorg (Linux) take way too much cputime while waiting for results from the notebook server

[malb]

On my P4 so as my P3 system whenever I undertake a long calculation using the notebook the polling for results takes way too much cputime. I guess it's caused by a very high polling frequency. top output follows:

 XXXX martin    25   0  125m  36m 9.8m R   80  2.4   1:13.44 python
 XXXX root      16   0  285m 176m 2860 R   36 11.6 204:18.81 Xorg
 XXXX martin    15   0 95860  43m  19m S   30  2.8   3:50.28 firefox-bin

How to reproduce: Calculate something difficult and monitor top.

Component: notebook

Issue created by migration from https://trac.sagemath.org/ticket/185

[sagetrac-mabshoff]

comment:3

Please investigate the issue. The orignial milestone was 1.8 so it has been a while.

Cheers,

Michael

[malb]

comment:4

The issues has not been resolved, an truncated exponential backoff was discussed here:

http://groups.google.com/group/sage-devel/browse_thread/thread/f8f76d438163e546/110cf0c908689635?

[boothby]

comment:5

I've implemented something like exponential falloff. Polling slows down gradually; after about 30 seconds, poll delay is 5 seconds.

[boothby]

Attachment: 185-smartpoll.patch.gz

[williamstein]

comment:7

It works fine for me; the code makes sense.

[sagetrac-mabshoff]

comment:8

Merged in Sage 2.10.4.final