sceKernelGetTscFrequency times 20 ms of TSC ticks against the monotonic
clock. A thread that moves to another CPU during the sleep reads its end
value from another TSC. Where the TSCs of the CPUs differ, as on a Windows
VM whose vCPU 0 counts about 3.8 billion ticks ahead of the others, the
frequency came out as 0 or as 180 GHz. Pin the calibrating thread to the
CPU it runs on and restore its affinity afterwards.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
sceKernelGetCurrentCpu returned the raw host CPU index. Guest affinities
are bookkeeping only and sceKernelGetAvailableCpumask advertises CPUs 0
to 12, so on a host with more than 13 logical CPUs a title could get 13
or higher, and a thread pinned to one CPU could get another one.
The host index now selects a CPU of the calling thread's affinity
clipped to the available mask, so the result is always an advertised
CPU and a thread pinned to one CPU reports that CPU.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01HeC9bA3n74TzJRYv9AgBE8
