Merge branch 'HEAD' of ssh://cesman@knoppmyth.net/mount/repository/LinHES-PKGBUILD

1 files changed, 66 insertions, 29 deletions

diff --git a/abs/core/linhes-scripts/limit-mythcommflag.sh b/abs/core/linhes-scripts/limit-mythcommflag.sh
index 8ca61c7..5cd81bb 100755
--- a/abs/core/linhes-scripts/limit-mythcommflag.sh
+++ b/abs/core/linhes-scripts/limit-mythcommflag.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
-# limit-mythcommflag.sh   v0.1  05/17/09
-# Utility to automatically limit mythcommflag if CPU usage is above a certain level.
+# limit-mythcommflag.sh   v0.2  03/2/10
+# Utility to automatically limit mythcommflag if CPU system load is above a certain level
+# and if backend usage is above a certain level
 # Uses cpulimit from http://cpulimit.sourceforge.net/
 # Free for any use.
 # Installation:
@@ -8,47 +9,83 @@
 #  chmod +x /usr/LH/bin/limit-mythcommflag.sh
 # Usage: Executed from runit limit-mythcommflag at boot
 
-# Threshold for when mythcommflag will be paused
-CPUTHRESHOLD=43
-
-# Limit mythcommflag to percentage
-LIMITCPU=20
-
-# Log file to write (use /dev/null for no log)
-#LOG=/var/log/mythtv/limit-mythcommflag.log
-LOG=/dev/null
-
+#-----OPTIONS______
 # Number of seconds to wait between checking for mythcommflag process
 SLEEP=5
+# Backend and Frontend thresholds above which mythcommflag is stopped
+BETHRESHOLD=30
+FETHRESHOLD=55
 
-#sleep $SLEEP
+# FUNCTIONS
+limit_cpu()
+# Arg_1 = LimitedRangeNum; Arg_2 = CPULimitPercent; Arg_3 = Commflag PID
+{
+if [ $ALREADYLIMITED -ne $1 ] ; then
+    if [ $cpulimit_pid -ne 0 ]; then
+        kill $cpulimit_pid
+    fi
+    cpulimit -p $3 -l $2 &
+    cpulimit_pid=$!
+    ALREADYLIMITED=$1
+fi
+}
 
-touch $LOG
+stop_limit()
+{
+if [ $ALREADYLIMITED -ne 0 ]; then
+    if [ $cpulimit_pid -ne 0 ]; then
+        kill $cpulimit_pid
+        cpulimit_pid=0
+    fi
+    ALREADYLIMITED=0
+fi
+}
 
 ALREADYLIMITED=0
+STOPPED=0
+cpulimit_pid=0
 
 while true; do
     PROCCOMMFLAG=`pidof mythcommflag`
-    if [ -n "${PROCCOMMFLAG}" ]
-    then
-        FRONTENDCPU=`top -bn1u mythtv | grep mythfrontend | awk '{ print $9 }'`
-        if [ "$FRONTENDCPU" -ge "$CPUTHRESHOLD" ]
-        then
-            echo "$(date) FE CPU $FRONTENDCPU% is greater than $CPUTHRESHOLD%, LIMIT Commflagging" # >> $LOG
-            if [ $ALREADYLIMITED -eq 0 ]; then
-                cpulimit -e mythcommflag -l $LIMITCPU &
-		cpulimit_pid=$!
-                ALREADYLIMITED=1
+    if [ -n "${PROCCOMMFLAG}" ]; then
+        BACKENDCPU=`top -bn1u mythtv | grep -m 1 mythbackend | awk '{ print $9 }'`
+        FRONTENDCPU=`top -bn1u mythtv | grep -m 1 mythfrontend | awk '{ print $9 }'`
+        if [ "$FRONTENDCPU" = "" ]; then
+            FRONTENDCPU=0
+        fi
+        if [ "$BACKENDCPU" -ge "$BETHRESHOLD" ]; then
+            if [ "$FRONTENDCPU" -ge $FETHRESHOLD ]; then
+                if [ $STOPPED -eq 0 ]; then
+                    kill -s STOP $PROCCOMMFLAG
+                    STOPPED=1
+                fi
+            else
+                if [ $STOPPED -eq 1 ]; then
+                    kill -s CONT $PROCCOMMFLAG
+                    STOPPED=0
+                fi
+                stop_limit
             fi
         else
-            echo "$(date) FE CPU $FRONTENDCPU% is less than $CPUTHRESHOLD%, UNLIMIT Commflagging" #>> $LOG
-            if [ $ALREADYLIMITED -eq 1 ]; then
-	        kill $cpulimit_pid
-                ALREADYLIMITED=0
+            if [ $STOPPED -eq 1 ]; then
+                kill -s CONT $PROCCOMMFLAG
+                STOPPED=0
             fi
+            case $FRONTENDCPU in
+	        [0-9]|[0-3][0-9] )
+                stop_limit;;
+	        [4-5][0-9] ) 
+                limit_cpu "1" "70" $PROCCOMMFLAG;;
+	        [6-7][0-9] ) 
+                limit_cpu "2" "50" $PROCCOMMFLAG;;
+	        [8-9][0-9] ) 
+                limit_cpu "3" "20" $PROCCOMMFLAG;;
+	        [1][0-9][0-9] )
+                limit_cpu "4" "10" $PROCCOMMFLAG;;
+	        esac
         fi
 #    else
-#        echo "No COMMFLAG Process Active" >> $LOG
+#        echo "No COMMFLAG Process Active"
     fi
     sleep $SLEEP
 done