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Per-thread scheduling. Closes #682.

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Tasks are spawned on a random thread. Currently they stay there, but
we should add task migration and load balancing in the future. This
should drammatically improve our task performance benchmarks.
This commit is contained in:
Eric Holk
2011-07-23 19:03:02 -07:00
parent b51f5c395c
commit 62bc6b5113
14 changed files with 239 additions and 185 deletions
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14
src/rt/rust_task.cpp
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@@ -83,7 +83,8 @@ rust_task::rust_task(rust_scheduler *sched, rust_task_list *state,
pinned_on(-1),
local_region(&sched->srv->local_region),
_on_wakeup(NULL),
failed(false)
failed(false),
propagate_failure(true)
{
LOGPTR(sched, "new task", (uintptr_t)this);
DLOG(sched, task, "sizeof(task) = %d (0x%x)", sizeof *this, sizeof *this);
@@ -207,8 +208,8 @@ rust_task::kill() {
// Unblock the task so it can unwind.
unblock();
// if (this == sched->root_task)
// sched->fail();
if (NULL == supervisor && propagate_failure)
sched->fail();
LOG(this, task, "preparing to unwind task: 0x%" PRIxPTR, this);
// run_on_resume(rust_unwind_glue);
@@ -229,6 +230,8 @@ rust_task::fail() {
supervisor->kill();
}
// FIXME: implement unwinding again.
if (NULL == supervisor && propagate_failure)
sched->fail();
failed = true;
}
@@ -248,6 +251,7 @@ rust_task::unsupervise()
" disconnecting from supervisor %s @0x%" PRIxPTR,
name, this, supervisor->name, supervisor);
supervisor = NULL;
propagate_failure = false;
}
void
@@ -397,8 +401,8 @@ rust_task::free(void *p, bool is_gc)
void
rust_task::transition(rust_task_list *src, rust_task_list *dst) {
I(sched, !kernel->scheduler_lock.lock_held_by_current_thread());
scoped_lock with(kernel->scheduler_lock);
I(sched, !sched->lock.lock_held_by_current_thread());
scoped_lock with(sched->lock);
DLOG(sched, task,
"task %s " PTR " state change '%s' -> '%s' while in '%s'",
name, (uintptr_t)this, src->name, dst->name, state->name);