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[2.0,2/5] runqueue: Add pressure change logging

Message ID 20231110135437.2902924-2-martin.jansa@gmail.com
State Accepted, archived
Commit b5f77e8159ad321f31999af8304f082a2c56b537
Headers show
Series [2.0,1/5] runqueue: fix PSI check calculation | expand

Commit Message

Martin Jansa Nov. 10, 2023, 1:54 p.m. UTC 
From: Richard Purdie <richard.purdie@linuxfoundation.org>

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.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 lib/bb/runqueue.py | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/lib/bb/runqueue.py b/lib/bb/runqueue.py
index 3e89c38bc..ab9e3fbe8 100644
--- a/lib/bb/runqueue.py
+++ b/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