8d11dd01a1
this change is to improve concurrency: - Drop global state stored in the shadow overflow page table (and all other global state) - Remove all global locks - Use per-PTE lock bits to allow parallel page insertion - Reconstruct state when requested for evicted PTEs instead of buffering it during overflow This drops total wall time for make buildworld on a 32-thread POWER8 system by a factor of two and system time by a factor of three, providing performance 20% better than similarly clocked Core i7 Xeons per-core. Performance on smaller SMP systems, where PMAP lock contention was not as much of an issue, is nearly unchanged. Tested on: POWER8, POWER5+, G5 UP, G5 SMP (64-bit and 32-bit kernels) Merged from: user/nwhitehorn/ppc64-pmap-rework Looked over by: jhibbits, andreast MFC after: 3 months Relnotes: yes Sponsored by: FreeBSD Foundation |
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| .. | ||
| interrupt.c | ||
| locore32.S | ||
| locore64.S | ||
| locore.S | ||
| machdep.c | ||
| mmu_oea64.c | ||
| mmu_oea64.h | ||
| mmu_oea.c | ||
| moea64_if.m | ||
| moea64_native.c | ||
| mp_cpudep.c | ||
| slb.c | ||
| trap_subr32.S | ||
| trap_subr64.S | ||
| trap.c | ||
| uma_machdep.c | ||