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high CPU usage
modisanyi:
Hi, I'm back with good news.
I have tracked down the culprit.
I have TortoiseSVN installed, and the TSVNCache process was scanning the folder and causing the spike in cpu usage in MC.
When I excluded the folder from caching in TortoiseSVN, the cpu usage in MC stopped. Interesting, indeed.
But, as the original poster stated, there is - it seems - another issue with the FTP module.
Every time I open a FTP connection, MC will eat up 1 core, and even if I close the connection, the cpu usage will remain until I restart MC. This seems not to be related to TortoiseSVN or the AV(Comodo) as both of them were disabled.
I will try to reproduce the issue on a clean VM installation.
Processexplorer will show FSFTP.dll+0x27732 as the cpu hog, inside MC.
Sorry about hijacking this thread. I thought that the two issues were related.
Thank you!
modisanyi:
Hi!
I have tested the FTP module cpu usage in a clean vm installation, and I was able to reproduce it every time I tried to connect to a remote ftp site - quick connect/saved session, anonymous user, passive mode. I have tested with 2 different sites, with same results.
Thanks!
Mathias (Author):
I can't redo it..
how FTP act depends a lot of how closely the FTP Server follows the standard. And the problem is that almost all ftp server do not follow the standard correct in some places. So there often need to be workaround for some servers.
Do you have NOOP (AntiIdle) enabled when connecting (that is the only own background work that FTP do) ?
Do you know what kind of FTP server you connecting to ?
modisanyi:
Sorry for the delay.
I'm not using the NOOP. I have just the "Use Passive Mode" checked, and not doing anything, just connecting to the server. After connecting, the cpu usage spikes, and will stay there even after disconnecting from the server. The only way to recover, is to close MC and start it again. The server software is - from its banner - Pure-FTPd [privsep] [TLS]
The ftp server is a public one, its address is ftp.astral.ro. Anonymous user and default port.
It could be, that the server configuration is weird in some way (I have tried another ftp server, which is not anonymous, and is behaving the same way. From its banner, it is FileZilla Server version 0.9.27 beta).
I have updated to MC v4.2 build 1672 but there is no change in this behaviour.
Thank you.
Mathias (Author):
Try to enable AntiIdle (NOOP), Might be that is starts anyway but without a connection.
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