[Bug 3809] New: Wine OSS driver sometimes uses 100% CPU.

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=3809

Summary: Wine OSS driver sometimes uses 100% CPU.
           Product: Wine
           Version: 0.9
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: wine-multimedia
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

When running Windows VSTs in a hosting app like Savihost sometimes Wine uses
100% CPU according to top:

mkdir SAVITEST
cd SAVITEST

wget http://www.hermannseib.com/programs/savihost.zip
unzip savihost.zip

wget http://www.greenoak.com/crystal/dl/Crystal.zip
unzip Crystal.zip

cp savihost.exe Crystal.exe

Now, run Savihost for the Crystal dll:

mark@lightning ~/SAVITEST $ wine ./Crystal.exe

With Wine set to use the OSS driver (the current default) Wine uses 100% CPU.
(Approcimately 15% usr, 85% sys on my AMD64 3000+ machine.

We have seen this problem on multiple machines (ia-32 and AMD64) and using many
VSTs other than Crystal.dll.

I'm entering this as 'major' as 100% CPU usage seems really bad to us.