File _service:obs_scm:cpu_qos-Add-aditional-setting-... of Package skylark

File _service:obs_scm:cpu_qos-Add-aditional-setting-for-cpu-QOS.patch of Package skylark

From 14b8a140c5794b28ccbb1c396924a9363767b7ea Mon Sep 17 00:00:00 2001
From: Keqian Zhu <zhukeqian1@huawei.com>
Date: Thu, 4 Aug 2022 15:34:59 -0400
Subject: [PATCH 2/3] cpu_qos: Add aditional setting for cpu QOS

Set overload_detect_period and offline_wait_interval, so as
to prevent low priority vm to be hungry too much time.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
 qos_controller/cpucontroller.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/qos_controller/cpucontroller.py b/qos_controller/cpucontroller.py
index f857973..f2a67e0 100644
--- a/qos_controller/cpucontroller.py
+++ b/qos_controller/cpucontroller.py
@@ -23,6 +23,10 @@ import util
 
 LOW_PRIORITY_SLICES_PATH = "/sys/fs/cgroup/cpu/low_prio_machine.slice"
 LOW_PRIORITY_QOS_LEVEL = -1
+OVERLOAG_DETECT_PERIOD_PATH = "/proc/sys/kernel/qos_overload_detect_period_ms"
+OVERLOAG_DETECT_PERIOD_MS = 100
+OFFLINE_WAIT_INTERVAL_PATH = "/proc/sys/kernel/qos_offline_wait_interval_ms"
+OFFLINE_WAIT_INTERVAL_MS = 100
 MIN_QUOTA_US = 0
 
 
@@ -36,8 +40,10 @@ class CpuController:
         qos_level_path = os.path.join(LOW_PRIORITY_SLICES_PATH, "cpu.qos_level")
         try:
             util.file_write(qos_level_path, str(LOW_PRIORITY_QOS_LEVEL))
+            util.file_write(OVERLOAG_DETECT_PERIOD_PATH, str(OVERLOAG_DETECT_PERIOD_MS))
+            util.file_write(OFFLINE_WAIT_INTERVAL_PATH, str(OFFLINE_WAIT_INTERVAL_MS))
         except IOError as error:
-            LOGGER.error("Failed to set low priority cpu qos level: %s" % str(error))
+            LOGGER.error("Failed to configure CPU QoS for low priority VMs: %s" % str(error))
             raise
 
     def limit_domain_bandwidth(self, guest_info, quota_threshold, abnormal_threshold):
-- 
2.33.0