[Bug 8245] New: WinRAR's multithreading mode doesn't work correctly on SMP system

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=8245

Summary: WinRAR's multithreading mode doesn't work correctly on
                    SMP system
           Product: Wine
           Version: CVS
          Platform: Other
               URL: http://rarlabs.com/download.htm
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: wine-kernel
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I've recently upgraded to a dual core AMD Athlon 64 CPU and now I'm able to test
multithreading mode in WinRAR.

The raw data follows:
WinRAR single threading mode: Wine 614Kb/sec | WinXP 626Kb/sec 
WinRAR multi  threading mode: Wine 605Kb/sec | WinXP 1020Kb/sec

I have kernel vanilla 2.6.21 linux kernel with SMP support - 7-zip archiver
works correctly, i.e. when I enable multithreading 7-zip's performance almost
doubles.

One anomaly is visible when I enable multithreading mode in WinRAR/Wine: system
CPU usage becomes excessive and wineserver process eats too much CPU cycles.