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Calculate and display mean_cycles_to_connect

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This commit is contained in:
Ian Gulliver
2016-03-05 14:46:31 -08:00
parent 3c8e283d6f
commit 9212a438df
1 changed files with 17 additions and 2 deletions
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19
stutterfuzz.c
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@@ -44,6 +44,7 @@ struct file {
struct conn { struct conn {
int fd; int fd;
struct file *file; struct file *file;
uint64_t start_cycle;
size_t offset; size_t offset;
struct list_head conn_list; struct list_head conn_list;
}; };
@@ -54,8 +55,11 @@ static struct list_head conn_pending_head = LIST_HEAD_INIT(conn_pending_head);
static int epoll_fd = -1; static int epoll_fd = -1;
static struct addrinfo *addrs = NULL; static struct addrinfo *addrs = NULL;
static uint64_t rounds = 0, open_conns = 0; static uint64_t rounds = 0, open_conns = 0, cycle = 0;
static bool shutdown_flag = false; static bool shutdown_flag = false;
static double mean_cycles_to_connect = 1.0;
#define CYCLE_SMOOTHING 0.9999
static void do_shutdown(int __attribute__((unused)) signal) { static void do_shutdown(int __attribute__((unused)) signal) {
shutdown_flag = true; shutdown_flag = true;
@@ -113,6 +117,10 @@ static bool parse_opts(int argc, char *argv[]) {
return true; return true;
} }
static void stats_print() {
fprintf(stderr, "\rStats: rounds=%ju, mean_cycles_to_connect=%0.2f \r", (uintmax_t) rounds, mean_cycles_to_connect);
}
static void file_open() { static void file_open() {
size_t dirlen = strlen(config.blob_dir); size_t dirlen = strlen(config.blob_dir);
@@ -194,7 +202,7 @@ static struct file *file_next() {
if (iter->next == &file_head) { if (iter->next == &file_head) {
iter = iter->next->next; iter = iter->next->next;
if (!(++rounds % 100)) { if (!(++rounds % 100)) {
fprintf(stderr, "\rRounds: %ju\r", (uintmax_t) rounds); stats_print();
} }
} else { } else {
iter = iter->next; iter = iter->next;
@@ -229,6 +237,7 @@ static void conn_new() {
char buf[1]; char buf[1];
sendto(conn->fd, buf, 0, MSG_DONTWAIT | MSG_FASTOPEN, addrs[0].ai_addr, addrs[0].ai_addrlen); sendto(conn->fd, buf, 0, MSG_DONTWAIT | MSG_FASTOPEN, addrs[0].ai_addr, addrs[0].ai_addrlen);
conn->file = file_next(); conn->file = file_next();
conn->start_cycle = cycle;
conn->offset = 0; conn->offset = 0;
list_add(&conn->conn_list, &conn_pending_head); list_add(&conn->conn_list, &conn_pending_head);
struct epoll_event ev = { struct epoll_event ev = {
@@ -287,6 +296,11 @@ static void conn_check(struct conn *conn) {
list_del(&conn->conn_list); list_del(&conn->conn_list);
list_add(&conn->conn_list, &conn_open_head); list_add(&conn->conn_list, &conn_open_head);
assert(!epoll_ctl(epoll_fd, EPOLL_CTL_DEL, conn->fd, NULL)); assert(!epoll_ctl(epoll_fd, EPOLL_CTL_DEL, conn->fd, NULL));
uint64_t cycles_to_connect = cycle - conn->start_cycle;
mean_cycles_to_connect = (
(mean_cycles_to_connect * CYCLE_SMOOTHING) +
((double) cycles_to_connect * (1.0 - CYCLE_SMOOTHING)));
} }
static void conn_check_all() { static void conn_check_all() {
@@ -344,6 +358,7 @@ int main(int argc, char *argv[]) {
}; };
while (!shutdown_flag) { while (!shutdown_flag) {
cycle++;
conn_cycle(); conn_cycle();
conn_fill(); conn_fill();
nanosleep(&ts, NULL); nanosleep(&ts, NULL);