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Date: Fri, 1 Sep 2006 15:34:29 -0700 (PDT)
From: Christoph Lameter <clameter@....com>
To: akpm@...l.org
Cc: Pekka Enberg <penberg@...helsinki.fi>,
Marcelo Tosatti <marcelo@...ck.org>,
linux-kernel@...r.kernel.org,
Nick Piggin <nickpiggin@...oo.com.au>, linux-mm@...ck.org,
Christoph Lameter <clameter@....com>, mpm@...enic.com,
Manfred Spraul <manfred@...orfullife.com>,
Dave Chinner <dgc@....com>, Andi Kleen <ak@...e.de>
Subject: [MODSLAB] Bypass indirections [for performance testing only]
Bypass indirections.
This is a patch to bypass indirections so that one can get some statistics
on how high the impact of the indirect calls is.
Only use this for testing.
Index: linux-2.6.18-rc5-mm1/mm/slabifier.c
===================================================================
--- linux-2.6.18-rc5-mm1.orig/mm/slabifier.c 2006-09-01 14:25:55.907938735 -0700
+++ linux-2.6.18-rc5-mm1/mm/slabifier.c 2006-09-01 15:20:51.915297648 -0700
@@ -498,12 +498,13 @@ gotpage:
goto redo;
}
-static void *slab_alloc(struct slab_cache *sc, gfp_t gfpflags)
+void *slab_alloc(struct slab_cache *sc, gfp_t gfpflags)
{
return __slab_alloc(sc, gfpflags, -1);
}
+EXPORT_SYMBOL(slab_alloc);
-static void *slab_alloc_node(struct slab_cache *sc, gfp_t gfpflags,
+void *slab_alloc_node(struct slab_cache *sc, gfp_t gfpflags,
int node)
{
#ifdef CONFIG_NUMA
@@ -512,8 +513,9 @@ static void *slab_alloc_node(struct slab
return slab_alloc(sc, gfpflags);
#endif
}
+EXPORT_SYMBOL(slab_alloc_node);
-static void slab_free(struct slab_cache *sc, const void *x)
+void slab_free(struct slab_cache *sc, const void *x)
{
struct slab *s = (void *)sc;
struct page * page;
@@ -617,6 +619,7 @@ dumpret:
return;
#endif
}
+EXPORT_SYMBOL(slab_free);
/* Figure out on which slab object the object resides */
static __always_inline struct page *get_object_page(const void *x)
Index: linux-2.6.18-rc5-mm1/include/linux/kmalloc.h
===================================================================
--- linux-2.6.18-rc5-mm1.orig/include/linux/kmalloc.h 2006-09-01 14:26:06.439513840 -0700
+++ linux-2.6.18-rc5-mm1/include/linux/kmalloc.h 2006-09-01 15:20:51.917250652 -0700
@@ -67,6 +67,10 @@ static inline int kmalloc_index(int size
return -1;
}
+extern void *slab_alloc(struct slab_cache *, gfp_t flags);
+extern void *slab_alloc_node(struct slab_cache *, gfp_t, int);
+extern void slab_free(struct slab_cache *, const void *);
+
/*
* Find the slab cache for a given combination of allocation flags and size.
*
@@ -96,7 +100,7 @@ static inline void *kmalloc(size_t size,
if (__builtin_constant_p(size) && !(flags & __GFP_DMA)) {
struct slab_cache *s = kmalloc_slab(size);
- return KMALLOC_ALLOCATOR.alloc(s, flags);
+ return slab_alloc(s, flags);
} else
return __kmalloc(size, flags);
}
@@ -108,7 +112,7 @@ static inline void *kmalloc_node(size_t
if (__builtin_constant_p(size) && !(flags & __GFP_DMA)) {
struct slab_cache *s = kmalloc_slab(size);
- return KMALLOC_ALLOCATOR.alloc_node(s, flags, node);
+ return slab_alloc_node(s, flags, node);
} else
return __kmalloc_node(size, flags, node);
}
@@ -119,7 +123,7 @@ static inline void *kmalloc_node(size_t
/* Free an object */
static inline void kfree(const void *x)
{
- return KMALLOC_ALLOCATOR.free(NULL, x);
+ slab_free(NULL, x);
}
/* Allocate and zero the specified number of bytes */
Index: linux-2.6.18-rc5-mm1/mm/kmalloc.c
===================================================================
--- linux-2.6.18-rc5-mm1.orig/mm/kmalloc.c 2006-09-01 14:26:06.440490342 -0700
+++ linux-2.6.18-rc5-mm1/mm/kmalloc.c 2006-09-01 15:20:51.917250652 -0700
@@ -124,15 +124,14 @@ static struct slab_cache *get_slab(size_
void *__kmalloc(size_t size, gfp_t flags)
{
- return KMALLOC_ALLOCATOR.alloc(get_slab(size, flags), flags);
+ return slab_alloc(get_slab(size, flags), flags);
}
EXPORT_SYMBOL(__kmalloc);
#ifdef CONFIG_NUMA
void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
- return KMALLOC_ALLOCATOR.alloc_node(get_slab(size, flags),
- flags, node);
+ return slab_alloc_node(get_slab(size, flags), flags, node);
}
EXPORT_SYMBOL(__kmalloc_node);
#endif
Index: linux-2.6.18-rc5-mm1/include/linux/slabulator.h
===================================================================
--- linux-2.6.18-rc5-mm1.orig/include/linux/slabulator.h 2006-09-01 14:26:06.861362745 -0700
+++ linux-2.6.18-rc5-mm1/include/linux/slabulator.h 2006-09-01 15:20:51.918227155 -0700
@@ -73,20 +73,23 @@ static inline const char *kmem_cache_nam
static inline void *kmem_cache_alloc(struct slab_cache *s, gfp_t flags)
{
- return SLABULATOR_ALLOCATOR.alloc(s, flags);
+ return slab_alloc(s, flags);
+ //return SLABULATOR_ALLOCATOR.alloc(s, flags);
}
static inline void *kmem_cache_alloc_node(struct slab_cache *s,
gfp_t flags, int node)
{
- return SLABULATOR_ALLOCATOR.alloc_node(s, flags, node);
+ return slab_alloc_node(s, flags, node);
+// return SLABULATOR_ALLOCATOR.alloc_node(s, flags, node);
}
extern void *kmem_cache_zalloc(struct slab_cache *s, gfp_t flags);
static inline void kmem_cache_free(struct slab_cache *s, const void *x)
{
- SLABULATOR_ALLOCATOR.free(s, x);
+ slab_free(s, x);
+// SLABULATOR_ALLOCATOR.free(s, x);
}
static inline int kmem_ptr_validate(struct slab_cache *s, void *x)
--
VGER BF report: H 9.54801e-11
-
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