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[Qemu-devel] [PATCH 6/6] cache slot lookup
From: |
Glauber Costa |
Subject: |
[Qemu-devel] [PATCH 6/6] cache slot lookup |
Date: |
Thu, 18 Dec 2008 12:01:42 -0500 |
record slot used in last lookup. For the common mmio case,
we'll usually access the same memory slot repeatedly.
Signed-off-by: Glauber Costa <address@hidden>
---
kvm-all.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index a94ee57..8896cf8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -75,16 +75,25 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
return NULL;
}
+static KVMSlot *last_slot = NULL;
+
static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr)
{
int i;
+
+ if (last_slot && (start_addr >= last_slot->start_addr &&
+ start_addr < (last_slot->start_addr + last_slot->memory_size)))
+ return last_slot;
+
for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
KVMSlot *mem = &s->slots[i];
if (start_addr >= mem->start_addr &&
- start_addr < (mem->start_addr + mem->memory_size))
+ start_addr < (mem->start_addr + mem->memory_size)) {
+ last_slot = mem;
return mem;
+ }
}
return NULL;
--
1.5.6.5
- [Qemu-devel] [PATCH 0/6] bypass tcg memory functions -v2, Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 1/6] remove smaller slots if registering a bigger one, Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 2/6] re-register whole area upon lfb unmap., Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 3/6] isolate io handling routine, Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 4/6] replace cpu_physical_memory_rw, Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Glauber Costa, 2008/12/18
- [Qemu-devel] [PATCH 6/6] cache slot lookup,
Glauber Costa <=
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Blue Swirl, 2008/12/19
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Laurent Desnogues, 2008/12/19
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Anthony Liguori, 2008/12/19
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Blue Swirl, 2008/12/20
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Glauber Costa, 2008/12/22
- Re: [Qemu-devel] [PATCH 5/6] hook cpu_register_physical_mem, Blue Swirl, 2008/12/23