CPU issues running WinSCP version 3.7.5 or higher on Win2000

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Alexis Tamas
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CPU issues running WinSCP version 3.7.5 or higher on Win2000

Hi,

When I use versions up to 3.7.4 (included) on Win2000 SP2, WinSCP works normally.

When I use version 3.7.5, 3.7.6 or 3.8.0, WinSCP is running but it is running *VERY* slowly. In the task manager, I can see that it takes 95-99% of the CPU and it is not possible to quit the program normally.

Do you need more information/testing ?

Regards,
Alexis Tamas

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mjbrown
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What are you doing when the CPU is pegged? Is it only when transferring files?

I notice high CPU usage in general, but it is tolerable when using the "transfer on background".

When the transfer occurs in the foreground, such as during a sync, I experience sluggishness in all other applications due to WinSCP hogging CPU. This can be alleviated by setting the transfer speed slider to slightly less than 100%.

I believe the problem may be related to buffer size conflicts as mentioned here, but I'm not sure. I hope the WinSCP maintainers can figure it out. I am willing to help test further, if they will give us guidance on what to try.

Also, is there a reason you are using Win2000 SP2 instead of SP4?

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Guest

Thank you mjbrown for your reply.

Actually, CPU is pegged when I do... nothing at all ! The problem begins as soon as WinSCP starts and ends as soon as WinSCP is killed (via the task manager).

Every version of WinSCP I tested before version 3.7.5 runs normally (for now, I use version 3.7.4).

The only change I can see in WinSCP since version 3.7.5 is the GUI appearence. So I think this problem may have something to do with the new GUI management by the program.

(there is no reason for me to use SP2 instead of SP4, I just miss time to update).

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martin
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Does it happen always? Isn't it affected by certain layout of window? Do CPU usage change if you resize the window or controls on the window?

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Another Guest
Guest

I have noticed the same thing. I am using Windows XP service pack 2. Windows layout does not matter and always happens. My CPU is so pegged sometimes I can not move the window. I have stop using it altogether, waiting on an update to see if the problem will go away.

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Alexis Tamas
Guest

Yes, it always happens using versions 3.7.5, 3.7.6 or 3.8.0, whatever theme I select in the preferences.

The problem starts when the main WinSCP window is displayed (once connected) not before. Then, I can use WinSCP normally except that the CPU is always somewhere between 90% and 100% (I can resize the main window).

When I quit the program, the window closes but the process 'winscp380.exe' is still running, the CPU still at 100% on it, and I have to kill the process manually. Then my CPU is back.

Using prior versions, everything works perfectly.

Tell me if I can help further (by testing some options, pre-release or test version or so).

Regards,
Alexis

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