Context switches bottleneck identification #1212

NEWS

@@ -16,6 +16,7 @@ Enhancements and new features:
     * Refactor InfluxDB (API is now stable) #1166
     * Remove graph export from Glances #1206
     * Add a code of conduct for Glances project's participants #1211
+    * Context switches bottleneck identification #1212
 
 Bugs corrected:
 

conf/glances.conf

@@ -49,13 +49,13 @@ steal_careful=50
 steal_warning=70
 steal_critical=90
 #steal_log=True
-# I/O wait percentage should be lower than 1/# (of CPU cores)
+# I/O wait percentage should be lower than 1/# (Logical CPU cores)
 # Leave commented to just use the default config (1/#-20% / 1/#-10% / 1/#)
 #iowait_careful=30
 #iowait_warning=40
 #iowait_critical=50
 # Context switch limit (core / second)
-# Leave commented to just use the default config (critical is 56000/# (of CPU core))
+# Leave commented to just use the default config (critical is 50000*# (Logical CPU cores)
 #ctx_switches_careful=10000
 #ctx_switches_warning=12000
 #ctx_switches_critical=14000

glances/config.py

@@ -172,7 +172,8 @@ class Config(object):
                              [str(iowait_bottleneck - (iowait_bottleneck * 0.20)),
                               str(iowait_bottleneck - (iowait_bottleneck * 0.10)),
                               str(iowait_bottleneck)])
-        ctx_switches_bottleneck = 56000 / multiprocessing.cpu_count()
+        # Context switches bottleneck identification #1212
+        ctx_switches_bottleneck = (500000 * 0.10) * multiprocessing.cpu_count()
         self.set_default_cwc('cpu', 'ctx_switches',
                              [str(ctx_switches_bottleneck - (ctx_switches_bottleneck * 0.20)),
                               str(ctx_switches_bottleneck - (ctx_switches_bottleneck * 0.10)),