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Make mmap() scalable

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It's now possible to create thousands of thousands of sparse independent
memory mappings, without any slowdown. The memory manager is better with
tracking memory protection now, particularly on Windows in a precise way
that can be restored during fork(). You now have the highest quality mem
manager possible. It's even better than some OSes like XNU, where mmap()
is implemented as an O(n) operation which means sadly things aren't much
improved over there. With this change the llamafile HTTP server endpoint
at /tokenize with a prompt of 50 tokens is now able to handle 2.6m r/sec
This commit is contained in:
Justine Tunney 2024-07-05 23:13:20 -07:00
parent 3756870635
commit 8c645fa1ee
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
59 changed files with 1238 additions and 1067 deletions
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14
third_party/nsync/mem/nsync_cv.c vendored
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@ -193,7 +193,7 @@ static int nsync_cv_wait_with_deadline_impl_ (struct nsync_cv_wait_with_deadline
/* A timeout or cancellation occurred, and no wakeup.
Acquire *pcv's spinlock, and confirm. */
c->old_word = nsync_spin_test_and_set_ (&c->pcv->word, CV_SPINLOCK,
CV_SPINLOCK, 0);
CV_SPINLOCK, 0, c->cv_mu);
/* Check that w wasn't removed from the queue after we
checked above, but before we acquired the spinlock.
The test of remove_count confirms that the waiter *w
@ -226,7 +226,7 @@ static int nsync_cv_wait_with_deadline_impl_ (struct nsync_cv_wait_with_deadline
has not yet set the waiting field to zero; a
cancellation or timeout may prevent this thread
from blocking above on the semaphore. */
attempts = nsync_spin_delay_ (attempts);
attempts = pthread_delay_np (c->cv_mu, attempts);
}
}
if (c->cv_mu != NULL && c->w->cv_mu == NULL) { /* waiter was moved to *pmu's queue, and woken. */
@ -323,7 +323,7 @@ int nsync_cv_wait_with_deadline_generic (nsync_cv *pcv, void *pmu,
}
/* acquire spinlock, set non-empty */
c.old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK|CV_NON_EMPTY, 0);
c.old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK|CV_NON_EMPTY, 0, pmu);
dll_make_last (&pcv->waiters, &c.w->nw.q);
c.remove_count = ATM_LOAD (&c.w->remove_count);
/* Release the spin lock. */
@ -355,7 +355,7 @@ void nsync_cv_signal (nsync_cv *pcv) {
int all_readers = 0;
/* acquire spinlock */
uint32_t old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK,
CV_SPINLOCK, 0);
CV_SPINLOCK, 0, pcv);
if (!dll_is_empty (pcv->waiters)) {
/* Point to first waiter that enqueued itself, and
detach it from all others. */
@ -438,7 +438,7 @@ void nsync_cv_broadcast (nsync_cv *pcv) {
int all_readers;
struct Dll *to_wake_list = NULL; /* waiters that we will wake */
/* acquire spinlock */
nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0);
nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0, pcv);
p = NULL;
next = NULL;
all_readers = 1;
@ -497,7 +497,7 @@ static nsync_time cv_ready_time (void *v, struct nsync_waiter_s *nw) {
static int cv_enqueue (void *v, struct nsync_waiter_s *nw) {
nsync_cv *pcv = (nsync_cv *) v;
/* acquire spinlock */
uint32_t old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0);
uint32_t old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0, pcv);
dll_make_last (&pcv->waiters, &nw->q);
ATM_STORE (&nw->waiting, 1);
/* Release spinlock. */
@ -509,7 +509,7 @@ static int cv_dequeue (void *v, struct nsync_waiter_s *nw) {
nsync_cv *pcv = (nsync_cv *) v;
int was_queued = 0;
/* acquire spinlock */
uint32_t old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0);
uint32_t old_word = nsync_spin_test_and_set_ (&pcv->word, CV_SPINLOCK, CV_SPINLOCK, 0, pcv);
if (ATM_LOAD_ACQ (&nw->waiting) != 0) {
dll_remove (&pcv->waiters, &nw->q);
ATM_STORE (&nw->waiting, 0);