Sch: Pause/limit task scheduling when over-memory

Track worker storage resources and devices
Track thunk runtime allocations with gc_num
Expand procutil option to time_util and alloc_util
Add storage option for specifying MemPool storage device
Format bytes in debug logs
Add locking around CHUNK_CACHE
Move return value Chunks to MemPool device

Author: jpsamaroo

Diff for: Project.toml

@@ -26,7 +26,7 @@ UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 Colors = "0.10, 0.11, 0.12"
 ContextVariablesX = "0.1"
 DataAPI = "1"
-MemPool = "0.3.5"
+MemPool = "0.3.10"
 Requires = "1"
 SentinelArrays = "1"
 StatsBase = "0.28, 0.29, 0.30, 0.31, 0.32, 0.33"

Diff for: src/processor.jl

@@ -342,7 +342,8 @@ get_tls() = (
     sch_uid=task_local_storage(:_dagger_sch_uid),
     sch_handle=task_local_storage(:_dagger_sch_handle),
     processor=thunk_processor(),
-    utilization=task_local_storage(:_dagger_utilization),
+    time_utilization=task_local_storage(:_dagger_time_utilization),
+    alloc_utilization=task_local_storage(:_dagger_alloc_utilization),
 )
 
 """
@@ -354,5 +355,6 @@ function set_tls!(tls)
     task_local_storage(:_dagger_sch_uid, tls.sch_uid)
     task_local_storage(:_dagger_sch_handle, tls.sch_handle)
     task_local_storage(:_dagger_processor, tls.processor)
-    task_local_storage(:_dagger_utilization, tls.utilization)
+    task_local_storage(:_dagger_time_utilization, tls.time_utilization)
+    task_local_storage(:_dagger_alloc_utilization, tls.alloc_utilization)
 end