bitbake: runqueue: Add pressure change logging

It is currently hard to tell when bitbake is throttling task execution
due to system pressure changes. Add notes to the console output to make
this clearer, only generating output when the values change.

(Bitbake rev: b5f77e8159ad321f31999af8304f082a2c56b537)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 3e89c38bcf..ab9e3fbe83 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -212,6 +212,10 @@ class RunQueueScheduler(object):
                     exceeds_cpu_pressure =  self.rq.max_cpu_pressure and (float(curr_cpu_pressure) - float(self.prev_cpu_pressure)) > self.rq.max_cpu_pressure
                     exceeds_io_pressure =  self.rq.max_io_pressure and (float(curr_io_pressure) - float(self.prev_io_pressure)) > self.rq.max_io_pressure
                     exceeds_memory_pressure = self.rq.max_memory_pressure and (float(curr_memory_pressure) - float(self.prev_memory_pressure)) > self.rq.max_memory_pressure
+            pressure_state = (exceeds_cpu_pressure, exceeds_io_pressure, exceeds_memory_pressure)
+            if hasattr(self, "pressure_state") and pressure_state != self.pressure_state:
+                bb.note("Pressure status changed to CPU: %s, IO: %s, Mem: %s" % pressure_state)
+            self.pressure_state = pressure_state
             return (exceeds_cpu_pressure or exceeds_io_pressure or exceeds_memory_pressure)
         return False