[X2Go-Dev] Issue with 100% cpu usage in x2goclient + libssh 0.6.0

[Oleksandr Shneyder]

Hello Orion,

We can't wait forever in ssh_select, we must perform other tasks in
loop, for example accepting forwarded connections. However, I have
already increased a select timeout and made a lot of other changes in
ssh code of X2Go Client. The changes are not yet in master GIT because
they depend on reverse forwarding fixes, that I made to libssh. As soon
as we have libssh packages ready, I'll push my local commits to GIT.

regards,
Alex


Am 22.01.2014 22:36, schrieb Orion Poplawski:
> With libssh 0.6.0, x2goclient consumes 100% cpu on connection.  The trigger
> for this is that ssh_select() was rewritten to use poll() instead of select().
>  poll() has a timeout in milliseconds, select() in microseconds.  x2goclient
> requests a timeout of 500 microseconds which is getting rounded down to a
> timeout of 0 milliseconds for poll().
> 
> However, this still seems to point to some poor coding on the part of
> x2goclient that we're using such short timeouts.  Why can't we just wait
> forever in ssh_select() in SshMasterConnection::channelLoop() ?
> 


-- 
----------------------------------------------------
Oleksandr Shneyder  | Email: o.shneyder at phoca-gmbh.de
phoca GmbH          | Tel. : 0911 - 14870374 0
Bräuhausgasse 9     | Fax. : 0911 - 14870374 9
D-82205 Gilching    | Mobil: 0163 - 49 64 461

Geschäftsführung:
Dipl.-Inf. Oleksandr Shneyder

Amtsgericht München | http://www.phoca-gmbh.de
HRB 196 658         | http://www.x2go.org
USt-IdNr.: DE281977973
----------------------------------------------------

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 259 bytes
Desc: OpenPGP digital signature
URL: <http://lists.x2go.org/pipermail/x2go-dev/attachments/20140123/a87e7e59/attachment.pgp>