process affinity

goblinsly2

Hello, in my logs it says "info: Process - Failed to update the process affinity, this may impact your framerate". Any idea why and how to solve it ? game_22083238.log

Jip

The warning originates from here:

if SetProcessPriority and GetProcessAffinityMask and SetProcessAffinityMask then

    -- priority values can be found at:
    -- - https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-setpriorityclass
    local success = SetProcessPriority(0x00000080)
    if success then
        LOG("Process - priority set to: 'high'")
    else
        LOG("Process - Failed to adjust process priority, this may impact your framerate")
    end

    -- affinity values acts like a bit mask, we retrieve the mask and 
    -- shift it if we think there are sufficient computing units
    local success, processAffinityMask, systemAffinityMask = GetProcessAffinityMask();
    if success then
        -- system has 24 (logical) computing units or more, skip the first two computing units and all cores beyond the first 24. We need 
        -- to do this because of floating point imprecision - we simply can't deduct a few digits to prevent using the first two cores
        if systemAffinityMask >= 16777215 then
            processAffinityMask = 16777212 -- 2 ^ 24 - 3 - 1

        -- system has 6 (logical) computing units or more, skip first two computing units
        elseif (systemAffinityMask >= 63) then
            processAffinityMask = systemAffinityMask - 3 -- (2 ^ 6 - 1) - 3
        end

        -- update the afinity mask
        if processAffinityMask != systemAffinityMask then
            local success = SetProcessAffinityMask(processAffinityMask);
            if success then
                LOG("Process - affinity set to: " .. tostring(processAffinityMask))
            else
                LOG("Process - Failed to adjust the process affinity, this may impact your framerate")
            end
        else
            LOG("Process - Failed to update the process affinity, this may impact your framerate") <-------------------------
        end
    else
        LOG("Process - Failed to retrieve the process affinity, this may impact your framerate")
    end
else
    LOG("Process - Failed to find process priority and affinity related functions, this may impact your framerate")
end

What CPU do you have, and do you use software to adjust the affinity manually?

goblinsly2

i have i5 2500k, i dont use any software to adjust it manualy

Jip

Oh, that makes sense then - the CPU has only 4 cores and then this feature is disabled. The feature disables the first core because the first core is also used by a lot of other processes. This may cause stutters. But it is only enabled when the CPU has at a minimum of 6 or more cores. The reason for that is simple: if you have 4 and you drop one then 3 may not be sufficient to run the game smoothly at all.

In your case, the warning is meaningless in my opinion .