Use HIGH priority to wake blocked timers (cherry-pick #11269) (#11278)

gcp-cherry-pick-bot[bot] and Conrad Irwin created 2 years ago

Cherry-picked Use HIGH priority to wake blocked timers (#11269)

One contributor to some beach-balls was that the main thread was calling
block_with_timeout, but the timeout never fired.

Release Notes:

- Reduced main thread hangs under very high system load

Co-authored-by: Conrad Irwin <[e-mail]>

Change summary

crates/gpui/build.rs                       | 1 -
crates/gpui/src/platform/mac/dispatcher.rs | 2 +-
2 files changed, 1 insertion(+), 2 deletions(-)

Detailed changes

crates/gpui/build.rs

@@ -38,7 +38,6 @@ mod macos {
             .header("src/platform/mac/dispatch.h")
             .allowlist_var("_dispatch_main_q")
             .allowlist_var("_dispatch_source_type_data_add")
-            .allowlist_var("DISPATCH_QUEUE_PRIORITY_DEFAULT")
             .allowlist_var("DISPATCH_QUEUE_PRIORITY_HIGH")
             .allowlist_var("DISPATCH_TIME_NOW")
             .allowlist_function("dispatch_get_global_queue")

crates/gpui/src/platform/mac/dispatcher.rs

@@ -76,7 +76,7 @@ impl PlatformDispatcher for MacDispatcher {
     fn dispatch_after(&self, duration: Duration, runnable: Runnable) {
         unsafe {
             let queue =
-                dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT.try_into().unwrap(), 0);
+                dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH.try_into().unwrap(), 0);
             let when = dispatch_time(DISPATCH_TIME_NOW as u64, duration.as_nanos() as i64);
             dispatch_after_f(
                 when,