diff options
| author | Jeremie Courreges-Anglas <jca@cvs.openbsd.org> | 2023-12-13 18:26:42 +0000 |
|---|---|---|
| committer | Jeremie Courreges-Anglas <jca@cvs.openbsd.org> | 2023-12-13 18:26:42 +0000 |
| commit | de5e972545b1a7c99895fb8c9bfe5a52657ad352 (patch) | |
| tree | 59dd8af7942733368de725d4348a197975afcc5a /sys/arch | |
| parent | 64f2f29e43834ec3a7dd4ca24c36b2f2781f0bfe (diff) | |
Implement per-CPU caching for the page table page (vp) pool and the PTE
descriptor (pted) pool in the [riscv64] pmap implementation. This
significantly reduces the side-effects of lock contention on the kernel
map lock that is (incorrectly) translated into excessive page daemon
wakeups. This is not a perfect solution but it does lead to significant
speedups [on the Hifive Unmatched]
Improvement and commit message adapted from kettenis' rev 1.110 commit
to arm64/pmap.c. ok phessler@ kettenis@
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/riscv64/include/pmap.h | 4 | ||||
| -rw-r--r-- | sys/arch/riscv64/riscv64/pmap.c | 9 |
2 files changed, 10 insertions, 3 deletions
diff --git a/sys/arch/riscv64/include/pmap.h b/sys/arch/riscv64/include/pmap.h index fcfd60d63be..1f52a260ee5 100644 --- a/sys/arch/riscv64/include/pmap.h +++ b/sys/arch/riscv64/include/pmap.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.h,v 1.9 2023/12/11 22:12:53 kettenis Exp $ */ +/* $OpenBSD: pmap.h,v 1.10 2023/12/13 18:26:41 jca Exp $ */ /* * Copyright (c) 2019-2020 Brian Bamsch <bbamsch@google.com> @@ -111,10 +111,10 @@ void pmap_physload_avail(void); struct pv_entry; /* investigate */ -#define pmap_init_percpu() do { /* nothing */ } while (0) #define pmap_unuse_final(p) do { /* nothing */ } while (0) int pmap_fault_fixup(pmap_t, vaddr_t, vm_prot_t); void pmap_postinit(void); +void pmap_init_percpu(void); #endif /* _KERNEL && !_LOCORE */ diff --git a/sys/arch/riscv64/riscv64/pmap.c b/sys/arch/riscv64/riscv64/pmap.c index 30db5d9b76b..1e33584f729 100644 --- a/sys/arch/riscv64/riscv64/pmap.c +++ b/sys/arch/riscv64/riscv64/pmap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.c,v 1.36 2023/11/28 09:10:18 jsg Exp $ */ +/* $OpenBSD: pmap.c,v 1.37 2023/12/13 18:26:41 jca Exp $ */ /* * Copyright (c) 2019-2020 Brian Bamsch <bbamsch@google.com> @@ -1774,6 +1774,13 @@ pmap_postinit(void) } void +pmap_init_percpu(void) +{ + pool_cache_init(&pmap_pted_pool); + pool_cache_init(&pmap_vp_pool); +} + +void pmap_update(pmap_t pm) { } |