pseudo code

examples/pseudo-code/pseudo-block.txt

@@ -0,0 +1,17 @@
+func chansend(channel, msg):
+  // non-blocking send
+  if ready(channel):
+    send(channel, msg)
+    return
+
+  t0 = now()
+  // let scheduler run another goroutine
+  // until the channel is ready
+  wait_ready(channel)
+  duration = now() - t0
+  send(channel, msg)
+  // sample a fraction of blocking events
+  if random_sample(duration):
+    s = stacktrace()
+    profile[s].count++
+    profile[s].duration += duration

examples/pseudo-code/pseudo-heap.txt

@@ -0,0 +1,20 @@
+func malloc(size):
+  object = ... // alloc magic
+
+  if random_sample():
+    s = stacktrace()
+    profile[s].allocs++
+    profile[s].alloc_bytes += sizeof(object)
+    track_profiled(object, s)
+
+  return object
+
+func sweep(object):
+  // do gc stuff to free object
+
+  if is_profiled(object)
+    s = alloc_stacktrace(object)
+    profile[s].frees++
+    profile[s].free_bytes += sizeof(object)
+
+  return object