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Add code to debug vector code performance.

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erdgeist 2008-10-23 23:58:18 +00:00
parent 41a1d2d025
commit cbd39af72d
2 changed files with 57 additions and 0 deletions
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53
ot_vector.c
View File

@ -11,6 +11,40 @@
#include "trackerlogic.h" #include "trackerlogic.h"
#include "ot_vector.h" #include "ot_vector.h"
#ifdef _DEBUG_VECTOR
#include <stdio.h>
static uint64_t vector_debug_inc[32];
static uint64_t vector_debug_noinc[32];
static uint64_t vector_debug_dec[32];
static uint64_t vector_debug_nodec[32];
static void vector_debug( size_t old_size, ssize_t diff_size, size_t old_space, ssize_t diff_space ) {
int x = 0;
while( old_space ) { old_space>>=1; ++x; }
old_size = old_size;
if( diff_size == -1 )
if( diff_space ) vector_debug_dec[x]++; else vector_debug_nodec[x]++;
else
if( diff_space ) vector_debug_inc[x]++; else vector_debug_noinc[x]++;
}
size_t vector_info( char * reply ) {
char * r = reply;
int i;
for( i=1; i<28; ++i )
r += sprintf( r, " inc % 12d -> % 12d: % 16lld\n", 1<<(i-1), 8<<(i-1), vector_debug_inc[i] );
for( i=1; i<28; ++i )
r += sprintf( r, "noinc % 12d -> % 12d: % 16lld\n", 1<<(i-1), 1<<(i-1), vector_debug_noinc[i] );
for( i=1; i<28; ++i )
r += sprintf( r, " dec % 12d -> % 12d: % 16lld\n", 1<<(i-1), 4<<(i-1), vector_debug_dec[i] );
for( i=1; i<28; ++i )
r += sprintf( r, "nodec % 12d -> % 12d: % 16lld\n", 1<<(i-1), 1<<(i-1), vector_debug_nodec[i] );
return r - reply;
}
#endif
/* This function gives us a binary search that returns a pointer, even if /* This function gives us a binary search that returns a pointer, even if
no exact match is found. In that case it sets exactmatch 0 and gives no exact match is found. In that case it sets exactmatch 0 and gives
calling functions the chance to insert data calling functions the chance to insert data
@ -44,6 +78,9 @@ void *binary_search( const void * const key, const void * base, const size_t mem
*/ */
void *vector_find_or_insert( ot_vector *vector, void *key, size_t member_size, size_t compare_size, int *exactmatch ) { void *vector_find_or_insert( ot_vector *vector, void *key, size_t member_size, size_t compare_size, int *exactmatch ) {
uint8_t *match = binary_search( key, vector->data, vector->size, member_size, compare_size, exactmatch ); uint8_t *match = binary_search( key, vector->data, vector->size, member_size, compare_size, exactmatch );
#ifdef _DEBUG_VECTOR
size_t old_space = vector->space;
#endif
if( *exactmatch ) return match; if( *exactmatch ) return match;
@ -59,6 +96,10 @@ void *vector_find_or_insert( ot_vector *vector, void *key, size_t member_size, s
vector->space = new_space; vector->space = new_space;
} }
memmove( match + member_size, match, ((uint8_t*)vector->data) + member_size * vector->size - match ); memmove( match + member_size, match, ((uint8_t*)vector->data) + member_size * vector->size - match );
#ifdef _DEBUG_VECTOR
vector_debug( vector->size, 1, old_space, vector->space - old_space );
#endif
vector->size++; vector->size++;
return match; return match;
} }
@ -74,6 +115,9 @@ int vector_remove_peer( ot_vector *vector, ot_peer *peer, int hysteresis ) {
size_t shrink_thresh = hysteresis ? OT_VECTOR_SHRINK_THRESH : OT_VECTOR_SHRINK_RATIO; size_t shrink_thresh = hysteresis ? OT_VECTOR_SHRINK_THRESH : OT_VECTOR_SHRINK_RATIO;
ot_peer *end = ((ot_peer*)vector->data) + vector->size; ot_peer *end = ((ot_peer*)vector->data) + vector->size;
ot_peer *match; ot_peer *match;
#ifdef _DEBUG_VECTOR
size_t old_space = vector->space;
#endif
if( !vector->size ) return 0; if( !vector->size ) return 0;
match = binary_search( peer, vector->data, vector->size, sizeof( ot_peer ), OT_PEER_COMPARE_SIZE, &exactmatch ); match = binary_search( peer, vector->data, vector->size, sizeof( ot_peer ), OT_PEER_COMPARE_SIZE, &exactmatch );
@ -92,11 +136,17 @@ int vector_remove_peer( ot_vector *vector, ot_peer *peer, int hysteresis ) {
vector->data = NULL; vector->data = NULL;
vector->space = 0; vector->space = 0;
} }
#ifdef _DEBUG_VECTOR
vector_debug( vector->size+1, -1, old_space, vector->space - old_space );
#endif
return exactmatch; return exactmatch;
} }
void vector_remove_torrent( ot_vector *vector, ot_torrent *match ) { void vector_remove_torrent( ot_vector *vector, ot_torrent *match ) {
ot_torrent *end = ((ot_torrent*)vector->data) + vector->size; ot_torrent *end = ((ot_torrent*)vector->data) + vector->size;
#ifdef _DEBUG_VECTOR
size_t old_space = vector->space;
#endif
if( !vector->size ) return; if( !vector->size ) return;
@ -109,6 +159,9 @@ void vector_remove_torrent( ot_vector *vector, ot_torrent *match ) {
vector->space /= OT_VECTOR_SHRINK_RATIO; vector->space /= OT_VECTOR_SHRINK_RATIO;
vector->data = realloc( vector->data, vector->space * sizeof( ot_torrent ) ); vector->data = realloc( vector->data, vector->space * sizeof( ot_torrent ) );
} }
#ifdef _DEBUG_VECTOR
vector_debug( vector->size+1, -1, old_space, vector->space - old_space );
#endif
} }
const char *g_version_vector_c = "$Source$: $Revision$\n"; const char *g_version_vector_c = "$Source$: $Revision$\n";

4
ot_vector.h
View File

@ -25,4 +25,8 @@ void *vector_find_or_insert( ot_vector *vector, void *key, size_t member_size, s
int vector_remove_peer( ot_vector *vector, ot_peer *peer, int hysteresis ); int vector_remove_peer( ot_vector *vector, ot_peer *peer, int hysteresis );
void vector_remove_torrent( ot_vector *vector, ot_torrent *match ); void vector_remove_torrent( ot_vector *vector, ot_torrent *match );
#ifdef _DEBUG_VECTOR
size_t vector_info( char * reply );
#endif
#endif #endif