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-rw-r--r--src/H5AC.c125
1 files changed, 109 insertions, 16 deletions
diff --git a/src/H5AC.c b/src/H5AC.c
index 1c570e8..c4ee46c 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -36,7 +36,9 @@
* accesses protected objects. NDEBUG must not be defined in order for
* this to have any effect.
*/
-/* #define H5AC_DEBUG_PROTECT */
+#ifdef NDEBUG
+# undef H5AC_DEBUG
+#endif
/*
* Private file-scope variables.
@@ -120,7 +122,7 @@ H5AC_dest (H5F_t *f)
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
{
intn i;
for (i=0; i<cache->nslots; i++) {
@@ -151,7 +153,7 @@ H5AC_dest (H5F_t *f)
* call to an H5AC function (if you want a pointer which is valid
* indefinately then see H5AC_protect()).
*
- * If H5AC_DEBUG_PROTECT is defined then this function also
+ * If H5AC_DEBUG is defined then this function also
* checks that the requested object is not currently
* protected since it is illegal to modify a protected object
* except through the pointer returned by H5AC_protect().
@@ -174,11 +176,15 @@ H5AC_dest (H5F_t *f)
* what type of object is at the address and calls this function with
* various type identifiers until one succeeds (cf., the debugger).
*
+ * Robb Matzke, 30 Oct 1997
+ * Keeps track of hits, misses, and flushes per object type so we have
+ * some cache performance diagnostics.
+ *
*-------------------------------------------------------------------------
*/
void *
H5AC_find_f (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
- void *udata1, void *udata2)
+ const void *udata1, void *udata2)
{
unsigned idx;
herr_t status;
@@ -202,8 +208,10 @@ H5AC_find_f (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
* Return right away if the item is in the cache.
*/
if (slot->type==type && slot->addr==addr) {
+ cache->diagnostics[type->id].nhits++;
HRETURN (slot->thing);
}
+ cache->diagnostics[type->id].nmisses++;
/*
* Fail if the item in the cache is at the correct address but is
@@ -213,7 +221,7 @@ H5AC_find_f (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
HRETURN_ERROR (H5E_CACHE, H5E_BADTYPE, NULL);
}
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
/*
* Check that the requested thing isn't protected, for protected things
* can only be modified through the pointer already handed out by the
@@ -251,6 +259,7 @@ H5AC_find_f (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
}
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, NULL);
}
+ cache->diagnostics[slot->type->id].nflushes++;
}
/*
@@ -396,6 +405,7 @@ H5AC_flush (H5F_t *f, const H5AC_class_t *type, haddr_t addr, hbool_t destroy)
map = H5MM_xfree (map);
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
+ cache->diagnostics[slot->type->id].nflushes++;
if (destroy) slot->type = NULL;
}
}
@@ -420,6 +430,7 @@ H5AC_flush (H5F_t *f, const H5AC_class_t *type, haddr_t addr, hbool_t destroy)
if (status<0) {
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
+ cache->diagnostics[cache->slot[i].type->id].nflushes++;
if (destroy) cache->slot[i].type = NULL;
}
@@ -435,7 +446,7 @@ H5AC_flush (H5F_t *f, const H5AC_class_t *type, haddr_t addr, hbool_t destroy)
* exist on disk yet, but it must have an address and disk
* space reserved.
*
- * If H5AC_DEBUG_PROTECT is defined then this function checks
+ * If H5AC_DEBUG is defined then this function checks
* that the object being inserted isn't a protected object.
*
* Return: Success: SUCCEED
@@ -469,9 +480,9 @@ H5AC_set (H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing)
assert (thing);
idx = H5AC_HASH (f, addr);
cache = f->shared->cache;
- slot =cache->slot + idx;
+ slot = cache->slot + idx;
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
{
intn i;
for (i=0; i<slot->nprots; i++) {
@@ -486,11 +497,13 @@ H5AC_set (H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing)
if (status<0) {
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
+ cache->diagnostics[slot->type->id].nflushes++;
}
slot->type = type;
slot->addr = addr;
slot->thing = thing;
+ cache->diagnostics[type->id].ninits++;
FUNC_LEAVE (SUCCEED);
}
@@ -502,7 +515,7 @@ H5AC_set (H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing)
* Purpose: Use this function to notify the cache that an object's
* file address changed.
*
- * If H5AC_DEBUG_PROTECT is defined then this function checks
+ * If H5AC_DEBUG is defined then this function checks
* that the old and new addresses don't correspond to the
* address of a protected object.
*
@@ -538,7 +551,7 @@ H5AC_rename (H5F_t *f, const H5AC_class_t *type,
new_idx = H5AC_HASH (f, new_addr);
cache = f->shared->cache;
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
{
int i;
@@ -574,6 +587,7 @@ H5AC_rename (H5F_t *f, const H5AC_class_t *type,
if (status<0) {
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
+ cache->diagnostics[cache->slot[new_idx].type->id].nflushes++;
}
/*
@@ -599,7 +613,7 @@ H5AC_rename (H5F_t *f, const H5AC_class_t *type,
* The caller must call H5AC_unprotect() when finished with
* the pointer.
*
- * If H5AC_DEBUG_PROTECT is defined then we check that the
+ * If H5AC_DEBUG is defined then we check that the
* requested object isn't already protected.
*
* Return: Success: Ptr to the object.
@@ -616,12 +630,19 @@ H5AC_rename (H5F_t *f, const H5AC_class_t *type,
*/
void *
H5AC_protect (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
- void *udata1, void *udata2)
+ const void *udata1, void *udata2)
{
int idx;
void *thing = NULL;
H5AC_t *cache = NULL;
H5AC_slot_t *slot = NULL;
+
+#ifdef H5AC_DEBUG
+ static ncalls = 0;
+ if (0==ncalls++) {
+ fprintf (stderr, "HDF5-DIAG: debugging cache (expensive)\n");
+ }
+#endif
FUNC_ENTER (H5AC_protect, NULL, NULL);
@@ -639,6 +660,7 @@ H5AC_protect (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
/*
* The object is already cached; simply remove it from the cache.
*/
+ cache->diagnostics[slot->type->id].nhits++;
thing = slot->thing;
slot->type = NULL;
slot->addr = 0;
@@ -651,7 +673,7 @@ H5AC_protect (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
HRETURN_ERROR (H5E_CACHE, H5E_BADTYPE, NULL);
} else {
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
/*
* Check that the requested thing isn't protected, for protected things
* can only be modified through the pointer already handed out by the
@@ -667,12 +689,13 @@ H5AC_protect (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
* Load a new thing. If it can't be loaded, then return an error
* without preempting anything.
*/
+ cache->diagnostics[type->id].nmisses++;
if (NULL==(thing=(type->load)(f, addr, udata1, udata2))) {
HRETURN_ERROR (H5E_CACHE, H5E_CANTLOAD, NULL);
}
}
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
/*
* Add the protected object to the protect debugging fields of the
* cache.
@@ -701,7 +724,7 @@ H5AC_protect (H5F_t *f, const H5AC_class_t *type, haddr_t addr,
* same as the corresponding call to H5AC_protect() and the
* THING argument should be the value returned by H5AC_protect().
*
- * If H5AC_DEBUG_PROTECT is defined then this function fails
+ * If H5AC_DEBUG is defined then this function fails
* if the TYPE and ADDR arguments are not what was used when the
* object was protected or if the object was never protected.
*
@@ -750,9 +773,10 @@ H5AC_unprotect (H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing)
if (status<0) {
HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL);
}
+ cache->diagnostics[slot->type->id].nflushes++;
}
-#if defined(H5AC_DEBUG_PROTECT) && !defined(NDEBUG)
+#ifdef H5AC_DEBUG
/*
* Remove the object's protect data to indicate that it is no longer
* protected.
@@ -782,3 +806,72 @@ H5AC_unprotect (H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing)
FUNC_LEAVE (SUCCEED);
}
+
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5AC_debug
+ *
+ * Purpose: Prints debugging info about the cache.
+ *
+ * Return: Success: SUCCEED
+ *
+ * Failure: FAIL
+ *
+ * Programmer: Robb Matzke
+ * Thursday, October 30, 1997
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5AC_debug (H5F_t *f)
+{
+ H5AC_subid_t i;
+ char s[32];
+ H5AC_t *cache = f->shared->cache;
+ double miss_rate;
+
+ FUNC_ENTER (H5AC_debug, NULL, FAIL);
+
+ fprintf (stderr, "HDF5-DIAG: cache diagnostics for %s\n", f->name);
+ fprintf (stderr, " %18s %8s %8s %8s %8s+%-8s\n",
+ "", "Hits", "Misses", "MissRate", "Inits", "Flushes");
+
+ for (i=0; i<H5AC_NTYPES; i++) {
+
+ switch (i) {
+ case H5AC_BT_ID:
+ strcpy (s, "B-tree nodes");
+ break;
+ case H5AC_SNODE_ID:
+ strcpy (s, "symbol table nodes");
+ break;
+ case H5AC_HEAP_ID:
+ strcpy (s, "heaps");
+ break;
+ case H5AC_OHDR_ID:
+ strcpy (s, "object headers");
+ break;
+ default:
+ sprintf (s, "unknown id %d", i);
+ }
+
+ if (cache->diagnostics[i].nhits) {
+ miss_rate = 100.0 * cache->diagnostics[i].nmisses /
+ cache->diagnostics[i].nhits;
+ } else {
+ miss_rate = 0.0;
+ }
+
+ fprintf (stderr, " %18s: %8d %8d %7.2f%% %8d%+-9d\n", s,
+ cache->diagnostics[i].nhits,
+ cache->diagnostics[i].nmisses,
+ miss_rate,
+ cache->diagnostics[i].ninits,
+ cache->diagnostics[i].nflushes-cache->diagnostics[i].ninits);
+ }
+
+ FUNC_LEAVE (SUCCEED);
+}
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