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authoryves <steve.harrison@gmx.net>2011-05-24 14:20:13 +0200
committeryves <steve.harrison@gmx.net>2011-05-24 14:20:13 +0200
commitef176e8f2d80fbdebb3b6e00005dd873fc2c4233 (patch)
tree43c169ec48efb0ca3ebc0818c67e0e8080bb2d79
parentc630a1b07403339ab3ce74cc10798cd0353230ad (diff)
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put yves asm in
-rw-r--r--cacheRows.c20
-rw-r--r--inlineasm.h9
2 files changed, 16 insertions, 13 deletions
diff --git a/cacheRows.c b/cacheRows.c
index c75be89..0111018 100644
--- a/cacheRows.c
+++ b/cacheRows.c
@@ -2,21 +2,24 @@
#include "inlineasm.h"
#include <stdlib.h>
-#define MEASURE_METHOD optmemmeasure
-#define RUNS 10000
+#define MEASURE_METHOD memmeasure
#define MIN_OFFSET 1
-#define MAX_OFFSET 512
+#define MAX_OFFSET 4096
#define OFFSETS (MAX_OFFSET - MIN_OFFSET)
#define FIELD_TYPE uint8_t
void measure(int offset,FIELD_TYPE *field){
+ uint64_t *res = malloc(sizeof(uint64_t)*MAX_OFFSET);
void *lowerAddress = field + offset;
int i;
+ int a = field[0];
+
+ for(i=MAX_OFFSET;i >= MIN_OFFSET;i--){
+ res[i] = MEASURE_METHOD(lowerAddress,res[i]*sizeof(FIELD_TYPE));
+ }
for(i=MIN_OFFSET;i <= MAX_OFFSET;i++){
- uint64_t time = MEASURE_METHOD(lowerAddress,i*sizeof(FIELD_TYPE));
- //if (time > 128 && time < 10000)
- fprintf(stdout,"%d %lld \r\n",i,time);
+ fprintf(stdout,"%d %lld \r\n",i,res[i]);
}
}
@@ -26,10 +29,7 @@ int main(int argc, char* argv[]) {
FIELD_TYPE *field = malloc(sizeof(FIELD_TYPE)*(MAX_OFFSET+1));
int i=0;
- //for(i=0;i < RUNS;i++){
- //fprintf(stdout,"RUN: %d \r\n",i);
- measure(0,field);
- //}
+ measure(0,field);
return 0;
diff --git a/inlineasm.h b/inlineasm.h
index fc048ca..218c532 100644
--- a/inlineasm.h
+++ b/inlineasm.h
@@ -38,14 +38,17 @@ static uint64_t rdtsc()
static uint64_t memmeasure(char* memory, uint64_t offset)
{
asm(
+
+ // here be magic dragons and memory access (read segfaults) ahead
+ // TODO: evaluate if more cmp types (like w and l) do make sense
+ "cmpb $0x23, (%%rbx) ;"
+
+ // get starting time
"rdtsc ;"
"shl $32, %%rdx ;"
"add %%rax, %%rdx ;"
"mov %%rdx, %%rdi ;"
- // here be magic dragons and memory access (read segfaults) ahead
- // TODO: evaluate if more cmp types (like w and l) do make sense
- "cmpb $0x23, (%%rbx) ;"
"cmpb $0x42, (%%rbx,%%rcx) ;"
"rdtsc ;"