test-009: add support for newer cpu.pressure output

Kernel commit 0e94682b73bf ("psi: introduce psi monitor"), adds more
information to the cgroup V2 cpu.pressure file. This patch recognizes
the additional information displayed while reading cpu.pressure file.

Older format:
-------------
cpu.pressure: some avg10=0.00 avg60=0.00 avg300=0.00 total=0

New format:
-----------
some avg10=0.00 avg60=0.00 avg300=0.00 total=0
full avg10=0.00 avg60=0.00 avg300=0.00 total=0

Fixes: https://github.com/libcgroup/libcgroup/issues/105
Reported-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/ftests/009-cgget-g_flag_controller_only.py b/ftests/009-cgget-g_flag_controller_only.py
index f59562b42ae136e08e38a602a868bdeb65c0b5ea..05add0a0996a756c8b2c1e65fc87c017f873c312 100755 (executable)
--- a/ftests/009-cgget-g_flag_controller_only.py
+++ b/ftests/009-cgget-g_flag_controller_only.py
@@ -55,6 +55,22 @@ cpu.uclamp.min: 0.00
 cpu.uclamp.max: max
 '''
 
+EXPECTED_OUT_V2_PSI = '''009cgget:
+cpu.weight: 100
+cpu.stat: usage_usec 0
+        user_usec 0
+        system_usec 0
+        nr_periods 0
+        nr_throttled 0
+        throttled_usec 0
+cpu.weight.nice: 0
+cpu.pressure: some avg10=0.00 avg60=0.00 avg300=0.00 total=0
+        full avg10=0.00 avg60=0.00 avg300=0.00 total=0
+cpu.max: max 100000
+cpu.uclamp.min: 0.00
+cpu.uclamp.max: max
+'''
+
 
 def prereqs(config):
     result = consts.TEST_PASSED
@@ -79,6 +95,8 @@ def test(config):
         expected_out = EXPECTED_OUT_V1
     elif version == CgroupVersion.CGROUP_V2:
         expected_out = EXPECTED_OUT_V2
+        if len(out.splitlines()) != len(expected_out.splitlines()):
+            expected_out = EXPECTED_OUT_V2_PSI
 
     if len(out.splitlines()) != len(expected_out.splitlines()):
         result = consts.TEST_FAILED