@@ -19,8 +19,7 @@ set +o xtrace

 # start_dstat() - Start running processes, including screen

 function start_dstat {

     # A better kind of sysstat, with the top process per time slice

-    DSTAT_OPTS="-tcmndrylpg --top-cpu-adv --top-io-adv"

-    run_process dstat "dstat $DSTAT_OPTS"

+    run_process dstat "$TOP_DIR/tools/dstat.sh $LOGDIR"

     # To enable peakmem_tracker add:

     #    enable_service peakmem_tracker

new file mode 100755

@@ -0,0 +1,32 @@

+#!/bin/bash

+

+# **tools/dstat.sh** - Execute instances of DStat to log system load info

+#

+# Multiple instances of DStat are executed in order to take advantage of

+# incompatible features, particularly CSV output and the "top-cpu-adv" and

+# "top-io-adv" flags.

+#

+# Assumes:

+#  - dstat command is installed

+

+# Retreive log directory as argument from calling script.

+LOGDIR=$1

+

+# Command line arguments for primary DStat process.

+DSTAT_OPTS="-tcmndrylpg --top-cpu-adv --top-io-adv"

+

+# Command-line arguments for secondary background DStat process.

+DSTAT_CSV_OPTS="-tcmndrylpg --output $LOGDIR/dstat-csv.log"

+

+# Execute and background the secondary dstat process and discard its output.

+dstat $DSTAT_CSV_OPTS >& /dev/null &

+

+# Execute and background the primary dstat process, but keep its output in this

+# TTY.

+dstat $DSTAT_OPTS &

+

+# Catch any exit signals, making sure to also terminate any child processes.

+trap "kill -- -$$" EXIT

+

+# Keep this script running as long as child dstat processes are alive.

+wait