[Git][NTPsec/ntpsec][master] ntpviz: add option -N to low at lowest priority.

[Gary E. Miller]

Gary E. Miller pushed to branch master at NTPsec / ntpsec


Commits:
3ab9b37c by Gary E. Miller at 2017-01-11T17:43:42-08:00
ntpviz: add option -N to low at lowest priority.

- - - - -


2 changed files:

- docs/includes/ntpviz-body.txt
- ntpclients/ntpviz


Changes:

=====================================
docs/includes/ntpviz-body.txt
=====================================
--- a/docs/includes/ntpviz-body.txt
+++ b/docs/includes/ntpviz-body.txt
@@ -24,6 +24,7 @@ ntpviz [-d LOGDIR] [-g] [-n name] [-p DAYS]
           --peer-jitters=hosts |
           --peer-offsets=hosts]
          [-D DLVL | --debug DLVL]
+         [-N | --nice]
          [-V | --version]
          [@OPTIONFILE]
 
@@ -90,6 +91,9 @@ subset of comparative plots for multiple directories.
     2 leaves the plot file in the system temp directory. +
     9 is painfully verbose. 9 also includes profile data.
 
+-N or --nice::
+    Run at the lowest possible priority.  Only available on UNIX.
+
 -V or --version:
     Print program version and exit.
 


=====================================
ntpclients/ntpviz
=====================================
--- a/ntpclients/ntpviz
+++ b/ntpclients/ntpviz
@@ -23,6 +23,7 @@ ntpviz [-d LOGDIR] [-g] [-n name] [-p DAYS]
           --peer-offsets=hosts |
          ]
          [-D DLVL | --debug DLVL]
+         [-N | --nice]
          [-V | --version]
          [@OPTIONFILE]
 
@@ -1342,12 +1343,28 @@ Python by ESR, concept and gnuplot code by Dan Drown.
                         dest='debug_level',
                         help="debug level, 0 (none) to 9 (most)",
                         type=int)
+    # some OS do not support os.nice()
+    try:
+        os.nice(0)
+        parser.add_argument('-N','--nice',
+                           action="store_true",
+                           dest='nice',
+                           help="Run as lowest priority")
+    except:
+        pass
+
     parser.add_argument('-V', '--version',
                         action="version",
                         version="ntpviz %s" % ntp.util.stdversion())
 
     args = parser.parse_args()
 
+    if args.nice:
+        # run at lowest possible priority
+        nice = os.nice(19)
+        if args.debug_level:
+            sys.stderr.write("ntpviz: INFO: Now running at nice %s\n" % nice)
+
     if 's' == args.width:
         # fit in 1024x768 browser
         # in 2016 this is 22% of all browsers



View it on GitLab: https://gitlab.com/NTPsec/ntpsec/commit/3ab9b37c532548d96ad8838a4dbb18f0da242d94
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