Nice Process Priority Configuration #1218

5 files changed, 54 insertions, 9 deletions

diff --git a/NEWS b/NEWS
index 9d9fc8df..78c88917 100644
--- a/NEWS
+++ b/NEWS
@@ -18,6 +18,7 @@ Enhancements and new features:
     * Add a code of conduct for Glances project's participants #1211
     * Context switches bottleneck identification #1212
     * Take advantage of the PSUtil issue #1025 (Add process_iter(attrs, ad_value)) #1105
+    * Nice Process Priority Configuration #1218
 
 Bugs corrected:
 
@@ -56,6 +57,20 @@ News command line options:
 
 News configuration keys in the glances.conf file:
 
+Processes list Nice value:
+
+    [processlist]
+    # Nice priorities range from -20 to 19.
+    # Configure nice levels using a comma separated list.
+    #
+    # Nice: Example 1, non-zero is warning (default behavior)
+    nice_warning=-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19
+    #
+    # Nice: Example 2, low priority processes escalate from careful to critical
+    #nice_careful=1,2,3,4,5,6,7,8,9
+    #nice_warning=10,11,12,13,14
+    #nice_critical=15,16,17,18,19
+
 Docker plugin (related to #1152)
 
     [docker]
diff --git a/conf/glances.conf b/conf/glances.conf
index fc06547f..b2be5401 100644
--- a/conf/glances.conf
+++ b/conf/glances.conf
@@ -210,6 +210,17 @@ cpu_critical=90
 mem_careful=50
 mem_warning=70
 mem_critical=90
+#
+# Nice priorities range from -20 to 19.
+# Configure nice levels using a comma separated list.
+#
+# Nice: Example 1, non-zero is warning (default behavior)
+nice_warning=-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19
+#
+# Nice: Example 2, low priority processes escalate from careful to critical
+#nice_careful=1,2,3,4,5,6,7,8,9
+#nice_warning=10,11,12,13,14
+#nice_critical=15,16,17,18,19
 
 [ports]
 # Ports scanner plugin configuration
diff --git a/docs/aoa/ps.rst b/docs/aoa/ps.rst
index bf4c1945..c8a4ac0b 100644
--- a/docs/aoa/ps.rst
+++ b/docs/aoa/ps.rst
@@ -122,5 +122,7 @@ The extended stats feature can be enabled using the
 (curses interface).
 
 .. note::
-    Limit values can be overwritten in the configuration file under
-    the ``[process]`` section.
+    Limit for CPU and MEM percent values can be overwritten in the
+    configuration file under the ``[processlist]`` section. It is also
+    possible to define limit for Nice values (comma separated list).
+    For example: nice_warning=-20,-19,-18
diff --git a/docs/man/glances.1 b/docs/man/glances.1
index f2bec9c7..7b052c20 100644
--- a/docs/man/glances.1
+++ b/docs/man/glances.1
@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "GLANCES" "1" "Dec 29, 2017" "3.0_DEV" "Glances"
+.TH "GLANCES" "1" "Jan 17, 2018" "3.0_DEV" "Glances"
 .SH NAME
 glances \- An eye on your system
 .
@@ -847,6 +847,6 @@ $ glances \-\-browser
 .sp
 Nicolas Hennion aka Nicolargo <\fI\%contact@nicolargo.com\fP>
 .SH COPYRIGHT
-2017, Nicolas Hennion
+2018, Nicolas Hennion
 .\" Generated by docutils manpage writer.
 .
diff --git a/glances/plugins/glances_processlist.py b/glances/plugins/glances_processlist.py
index e27ab6dd..95d17c27 100644
--- a/glances/plugins/glances_processlist.py
+++ b/glances/plugins/glances_processlist.py
@@ -202,6 +202,26 @@ class Plugin(GlancesPlugin):
 
         return child_data
 
+    def get_nice_alert(self, value):
+        """Return the alert relative to the Nice configuration list"""
+        value = str(value)
+        try:
+            if value in self.get_limit('nice_critical'):
+                return 'CRITICAL'
+        except KeyError:
+            pass
+        try:
+            if value in self.get_limit('nice_warning'):
+                return 'WARNING'
+        except KeyError:
+            pass
+        try:
+            if value in self.get_limit('nice_careful'):
+                return 'CAREFUL'
+        except KeyError:
+            pass
+        return 'DEFAULT'
+
     def get_process_curses_data(self, p, first, args):
         """Get curses data to display for a process.
 
@@ -264,11 +284,8 @@ class Plugin(GlancesPlugin):
             if nice is None:
                 nice = '?'
             msg = '{:>5}'.format(nice)
-            if isinstance(nice, int) and ((WINDOWS and nice != 32) or
-                                          (not WINDOWS and nice != 0)):
-                ret.append(self.curse_add_line(msg, decoration='NICE'))
-            else:
-                ret.append(self.curse_add_line(msg))
+            ret.append(self.curse_add_line(msg,
+                                           decoration=self.get_nice_alert(nice)))
         else:
             msg = '{:>5}'.format('?')
             ret.append(self.curse_add_line(msg))