New subject: [Bug 56653] GetLogicalProcessorInformation can be missing Cache information

8 May 2024


      https://bugs.winehq.org/show_bug.cgi?id=56653
Bug ID: 56653
           Summary: GetLogicalProcessorInformation can be missing Cache
                    information
           Product: Wine
           Version: unspecified
          Hardware: aarch64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: wine-bugs@winehq.org
          Reporter: sebastien.chev@gmail.com
      Distribution: ---
On some ARM64 platform, like SnapDragon, the
GetLogicalProcessorInformation(...) will not fill-in Cache information.
Some system file, specificaly:
"/sys/devices/system/cpu/cpu%u/cache/index%u/ways_of_associativity",
"/sys/devices/system/cpu/cpu%u/cache/index%u/coherency_line_size" and
"/sys/devices/system/cpu/cpu%u/cache/index%u/size" are missing, leading a an
early abort of the "create_logical_proc_info(...)" helper function.
Some games, like Baldur's Gate 3 actually use the Cache informations to guess
the optimal number of Worker to spawn. With the cache info missing, 0 workers
are spawn, leading to a Stack Overflow later in the loading.
Debugged using the x86_64 version of Wine on ARM64 platform with Box64, but the
issue is linux specific, not arch specific.
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[Bug 56653] New: GetLogicalProcessorInformation can be missing Cache information