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Fixed ridiculous CPU usage

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This commit is contained in:
Nate Choe
2022-01-25 05:10:04 -06:00
parent 96794b2696
commit 6bbfb59d34
5 changed files with 73 additions and 79 deletions
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42
src/main.c
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@@ -103,21 +103,20 @@ int main(int argc, char **argv) {
}
int *pending = calloc(processes - 1, sizeof(int));
int *schedule = malloc(2 * sizeof(int));
if (schedule == NULL)
exit(EXIT_FAILURE);
schedule[0] = -1;
int (*notify)[2] = malloc(sizeof(int[2]) * (processes - 1));
pthread_t *threads = malloc(sizeof(pthread_t) * (processes - 1));
if (threads == NULL)
exit(EXIT_FAILURE);
for (int i = 0; i < processes - 1; i++) {
if (pipe(notify[i]))
exit(EXIT_FAILURE);
RunnerArgs *args = malloc(sizeof(RunnerArgs));
if (args == NULL)
exit(EXIT_FAILURE);
args->site = site;
args->pending = pending;
args->schedule = schedule;
args->notify = notify[i][0];
args->id = i;
pthread_create(threads + i, NULL,
(void*(*)(void*)) runServer, args);
@@ -126,24 +125,23 @@ int main(int argc, char **argv) {
for (;;) {
fsync(fd);
//TODO: Find out why this works
if (schedule[0] == -1) {
int newfd = accept(fd, (struct sockaddr *) &addr,
&addrlen);
if (newfd < 0)
exit(EXIT_FAILURE);
int flags = fcntl(newfd, F_GETFL);
if (fcntl(newfd, F_SETFL, flags | O_NONBLOCK))
exit(EXIT_FAILURE);
int lowestThread = 0;
int lowestCount = pending[0];
for (int i = 1; i < processes - 1; i++) {
if (pending[i] < lowestCount) {
lowestThread = i;
lowestCount = pending[i];
}
int newfd = accept(fd, (struct sockaddr *) &addr,
&addrlen);
if (newfd < 0)
exit(EXIT_FAILURE);
int flags = fcntl(newfd, F_GETFL);
if (fcntl(newfd, F_SETFL, flags | O_NONBLOCK))
exit(EXIT_FAILURE);
int lowestThread = 0;
int lowestCount = pending[0];
for (int i = 1; i < processes - 1; i++) {
if (pending[i] < lowestCount) {
lowestThread = i;
lowestCount = pending[i];
}
schedule[1] = newfd;
schedule[0] = lowestThread;
}
if (write(notify[lowestThread][1], &newfd, sizeof(newfd))
< sizeof(newfd))
exit(EXIT_FAILURE);
}
}