static ALWAYS_INLINE unsigned int schedule_client(struct lwan *l, int fd)
{
struct lwan_thread *thread = l->conns[fd].thread;
lwan_thread_add_client(thread, fd);
return (unsigned int)(thread - l->thread.threads);
}
static ALWAYS_INLINE void
schedule_client(lwan_t *l, int fd)
{
int thread;
#ifdef __x86_64__
static_assert(sizeof(lwan_connection_t) == 32,
"Two connections per cache line");
/* Since lwan_connection_t is guaranteed to be 32-byte long, two of them
* can fill up a cache line. This formula will group two connections
* per thread in a way that false-sharing is avoided. This gives wrong
* results when fd=0, but this shouldn't happen (as 0 is either the
* standard input or the main socket, but even if that changes,
* scheduling will still work). */
thread = ((fd - 1) / 2) % l->thread.count;
#else
static int counter = 0;
thread = counter++ % l->thread.count;
#endif
lwan_thread_t *t = &l->thread.threads[thread];
lwan_thread_add_client(t, fd);
}
