static void server_loop(int fd)
{
struct timeval snaptime = { 0 };
struct pollfd p;
p.fd = fd;
p.events = p.revents = POLLIN;
sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d",
getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000);
load_info();
for (;;) {
int status;
time_t tdiff;
struct timeval now;
gettimeofday(&now, NULL);
tdiff = T_DIFF(now, snaptime);
if (tdiff >= scan_interval) {
update_db(tdiff);
snaptime = now;
tdiff = 0;
}
if (poll(&p, 1, scan_interval - tdiff) > 0
&& (p.revents&POLLIN)) {
int clnt = accept(fd, NULL, NULL);
if (clnt >= 0) {
pid_t pid;
if (children >= 5) {
close(clnt);
} else if ((pid = fork()) != 0) {
if (pid > 0)
children++;
close(clnt);
} else {
FILE *fp = fdopen(clnt, "w");
if (fp)
dump_raw_db(fp, 0);
exit(0);
}
}
}
while (children && waitpid(-1, &status, WNOHANG) > 0)
children--;
}
}
static void server_loop(int fd)
{
struct timeval snaptime;
struct pollfd p;
memset(&snaptime, 0, sizeof(snaptime));
p.fd = fd;
p.events = p.revents = POLLIN;
load_info();
for (;;) {
int status;
int tdiff;
struct timeval now;
gettimeofday(&now, NULL);
tdiff = T_DIFF(now, snaptime);
// if (tdiff >= 0) {
update_db(tdiff);
snaptime = now;
tdiff = 0;
// }
if (poll(&p, 1, conf.scan_interval-tdiff) > 0
&& (p.revents&POLLIN)) {
int clnt = accept(fd, NULL, NULL);
if (clnt >= 0) {
pid_t pid;
/*
We assume forking will be ok
so update database here not
have races with forked process
*/
gettimeofday(&now, NULL);
tdiff = T_DIFF(now, snaptime);
// if (tdiff >= min_interval) {
update_db(tdiff);
snaptime = now;
tdiff = 0;
// }
poll_client(clnt);
sprintf(info_source,
"pid=%d sampling_interval=%d "
"time_const=%d",
getpid(),
conf.scan_interval/1000,
conf.time_constant/1000);
if (children >= 5) {
close(clnt);
} else if ((pid = fork()) != 0) {
if (pid>0)
children++;
close(clnt);
} else {
FILE *fp = fdopen(clnt, "w");
if (fp) {
/* Write on clients socket */
dump_raw_db(fp);
}
exit(0);
}
}
}
while (children && waitpid(-1, &status, WNOHANG) > 0)
children--;
}
}
void diff_taskstats(struct taskstats* res, struct taskstats* t1, struct taskstats* t2)
{
#define T_DIFF(name) res->name = (t1->name - t2->name)
#define T_ASSIGN(name) res->name = t1->name
T_DIFF(cpu_delay_total);
T_DIFF(cpu_run_real_total);
T_DIFF(ac_utime);
T_DIFF(ac_stime);
T_DIFF(read_char);
T_DIFF(write_char);
T_DIFF(read_syscalls);
T_DIFF(write_syscalls);
T_DIFF(read_bytes);
T_DIFF(write_bytes);
T_DIFF(cancelled_write_bytes);
T_DIFF(cpu_delay_total);
T_DIFF(blkio_delay_total);
T_DIFF(swapin_delay_total);
T_DIFF(freepages_delay_total);
T_DIFF(nvcsw);
T_ASSIGN(ac_pid);
T_ASSIGN(ac_ppid);
T_ASSIGN(ac_btime);
res->ac_etime = t1->ac_etime;
memcpy(&res->ac_comm, &t1->ac_comm, sizeof(t1->ac_comm));
}
