cpp/stutterfuzz
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Slow down the cycle time.

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This commit is contained in:
Ian Gulliver
2016-03-04 13:49:45 -08:00
parent e0462a61fe
commit b70a1e09f2
1 changed files with 23 additions and 3 deletions
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26
stutterfuzz.c
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@@ -11,6 +11,7 @@
#include <sys/socket.h> #include <sys/socket.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
#include <time.h>
#include <unistd.h> #include <unistd.h>
#include "list.h" #include "list.h"
@@ -19,8 +20,10 @@
static struct { static struct {
char *blob_dir; char *blob_dir;
uint32_t num_conns; uint32_t num_conns;
uint32_t cycle_ms;
} config = { } config = {
.num_conns = 100, .num_conns = 100,
.cycle_ms = 50,
}; };
struct file { struct file {
@@ -45,6 +48,7 @@ static uint64_t rounds = 0, open_conns = 0;
static bool parse_opts(int argc, char *argv[]) { static bool parse_opts(int argc, char *argv[]) {
static struct option long_options[] = { static struct option long_options[] = {
{"blob-dir", required_argument, 0, 'b'}, {"blob-dir", required_argument, 0, 'b'},
{"cycle-ms", required_argument, 0, 'c'},
{"num-conns", required_argument, 0, 'n'}, {"num-conns", required_argument, 0, 'n'},
{0, 0, 0, 0 }, {0, 0, 0, 0 },
}; };
@@ -56,9 +60,14 @@ static bool parse_opts(int argc, char *argv[]) {
config.blob_dir = optarg; config.blob_dir = optarg;
break; break;
case 'c':
config.cycle_ms = (uint32_t) strtoul(optarg, NULL, 10);
break;
case 'n': case 'n':
config.num_conns = (uint32_t) strtoul(optarg, NULL, 10); config.num_conns = (uint32_t) strtoul(optarg, NULL, 10);
assert(config.num_conns); assert(config.num_conns);
break;
default: default:
return false; return false;
@@ -76,7 +85,7 @@ static bool parse_opts(int argc, char *argv[]) {
return true; return true;
} }
static void open_blobs() { static void file_open() {
size_t dirlen = strlen(config.blob_dir); size_t dirlen = strlen(config.blob_dir);
DIR *dir = opendir(config.blob_dir); DIR *dir = opendir(config.blob_dir);
@@ -143,7 +152,9 @@ static struct file *file_next() {
if (iter->next == &file_head) { if (iter->next == &file_head) {
iter = iter->next->next; iter = iter->next->next;
rounds++; rounds++;
fprintf(stderr, "\rRounds: %ju", (uintmax_t) rounds); if (!(++rounds % 100)) {
fprintf(stderr, "\rRounds: %ju", (uintmax_t) rounds);
}
} else { } else {
iter = iter->next; iter = iter->next;
} }
@@ -210,11 +221,20 @@ int main(int argc, char *argv[]) {
return 1; return 1;
} }
open_blobs(); file_open();
#define NS_PER_S 1000000000
#define NS_PER_MS 1000000
uint64_t cycle_ns = config.cycle_ms * NS_PER_MS;
struct timespec ts = {
.tv_sec = cycle_ns / NS_PER_S,
.tv_nsec = (config.cycle_ms * NS_PER_MS) % NS_PER_S,
};
while (true) { while (true) {
conn_fill(); conn_fill();
conn_send_messages(); conn_send_messages();
assert(!nanosleep(&ts, NULL));
} }
// rand_cleanup(); // rand_cleanup();