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Add some more comments and a -4 argument to restrict searches to only

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A (not default A and AAAA) records.  Now the longest time that a -4
thread might hang trying to resolve is only 2:30 instead of 5:00 ;)
This commit is contained in:
Brian Feldman 2004-02-21 22:42:54 +00:00
parent 3a7fa52e65
commit b99c0fd2b4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=126085
1 changed files with 16 additions and 5 deletions
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21
tools/regression/gaithrstress/gaithrstress.c
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@ -53,6 +53,7 @@ static volatile int workers_stop = 0;
static double max_random_sleep = 1.0;
static char **randwords;
static size_t nrandwords;
static const struct addrinfo *hints, hintipv4only = { .ai_family = AF_INET };
/*
* We don't have good random(3)-type functions that are thread-safe,
@ -89,13 +90,20 @@ randomsleep(double max_sleep_sec)
* Start looking up arbitrary hostnames and record the successes/failures.
* Between lookups, sleep a random amount of time to make sure threads
* stay well out of synchronization.
*
* Host name: part probability
* ---- -----------
* www. 1/2
* random word always, equal
* random word 1/3, equal
* .(net|com|org) equal
*/
static void *
work(void *arg)
{
struct worker *w = arg;
/* Turn off domain name list searching. */
/* Turn off domain name list searching as much as possible. */
if (_res.options & RES_INIT || res_init() == 0)
_res.options &= ~RES_DNSRCH;
do {
@ -115,7 +123,7 @@ work(void *arg)
suffixes[my_arc4random_r() % nsuffixes]) == -1)
continue;
(void)clock_gettime(CLOCK_REALTIME, &ts_begintime);
error = getaddrinfo(hostname, NULL, NULL, &res);
error = getaddrinfo(hostname, NULL, hints, &res);
(void)clock_gettime(CLOCK_REALTIME, &ts_total);
ts_total.tv_sec -= ts_begintime.tv_sec;
ts_total.tv_nsec -= ts_begintime.tv_nsec;
@ -188,8 +196,11 @@ main(int argc, char **argv) {
printf("%s: threaded stress-tester for getaddrinfo(3)\n",
getprogname());
printf("(c) 2004 Brian Feldman <green@FreeBSD.org>\n");
while ((ch = getopt(argc, argv, "s:t:w:")) != -1) {
while ((ch = getopt(argc, argv, "4s:t:w:")) != -1) {
switch (ch) {
case '4':
hints = &hintipv4only;
break;
case 's':
max_random_sleep = strtod(optarg, &send);
if (*send != '\0')
@ -205,8 +216,8 @@ main(int argc, char **argv) {
break;
default:
usage:
fprintf(stderr, "usage: %s [-s sleep] [-t threads] "
"[-w wordfile]\n", getprogname());
fprintf(stderr, "usage: %s [-4] [-s sleep] "
"[-t threads] [-w wordfile]\n", getprogname());
exit(2);
}
}