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[Qemu-devel] [PATCH 5/5] cache slot lookup
From: |
Glauber Costa |
Subject: |
[Qemu-devel] [PATCH 5/5] cache slot lookup |
Date: |
Wed, 17 Dec 2008 15:47:02 -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 b432e14..51fc3ed 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 0/5] Replace tcg memory functions, Glauber Costa, 2008/12/17
- [Qemu-devel] [PATCH 1/5] re-register whole area upon lfb unmap., Glauber Costa, 2008/12/17
- [Qemu-devel] [PATCH 2/5] isolate io handling routing, Glauber Costa, 2008/12/17
- [Qemu-devel] [PATCH 3/5] replace cpu_physical_memory_rw, Glauber Costa, 2008/12/17
- [Qemu-devel] [PATCH 4/5] hook cpu_register_physical_mem, Glauber Costa, 2008/12/17
- [Qemu-devel] [PATCH 5/5] cache slot lookup,
Glauber Costa <=
- [Qemu-devel] Re: [PATCH 5/5] cache slot lookup, Avi Kivity, 2008/12/18
- [Qemu-devel] Re: [PATCH 5/5] cache slot lookup, Glauber Costa, 2008/12/18
- Re: [Qemu-devel] Re: [PATCH 5/5] cache slot lookup, Daniel P. Berrange, 2008/12/18
- Re: [Qemu-devel] Re: [PATCH 5/5] cache slot lookup, Glauber Costa, 2008/12/18
- [Qemu-devel] Re: [PATCH 5/5] cache slot lookup, Avi Kivity, 2008/12/18
- [Qemu-devel] Re: [PATCH 3/5] replace cpu_physical_memory_rw, Anthony Liguori, 2008/12/17
- [Qemu-devel] Re: [PATCH 3/5] replace cpu_physical_memory_rw, Glauber Costa, 2008/12/17
- [Qemu-devel] Re: [PATCH 2/5] isolate io handling routing, Anthony Liguori, 2008/12/17
[Qemu-devel] Re: [PATCH 1/5] re-register whole area upon lfb unmap., Anthony Liguori, 2008/12/17