blob: 18309d74f81bc8075ea65db8cd361ccae3d23865 [file] [log] [blame]
#!/bin/sh
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
. /usr/share/misc/shflags || exit 1
DEFINE_string directory /tmp "Bootstat archive directory" d
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"
NCPU=$(grep '^processor' /proc/cpuinfo | wc -l)
SUMMARIZE_TIME='
BEGIN {
printf "%8s %4s %8s %4s %s\n", "time", "%cpu", "dt", "%dt", "event"
}
{
# input lines are like this:
# $1 = time since boot
# $2 = idle time since boot (normalized for NCPU)
# $3 = event name
# input lines are sorted by $1
uptime = $1 ; idle = $2
cum_util = (200 * (uptime - idle) / uptime + 1) / 2
delta = uptime - prev
if (delta != 0) {
util = (200 * (delta - idle + prev_idle) / delta + 1) / 2
} else {
util = 100
}
printf "%8d %3d%% %8d %3d%% %s\n", uptime, cum_util, delta, util, $3
prev = uptime ; prev_idle = idle
}
'
# If there are no arguments on the command line, summarize all the
# events. If there are arguments, summarize only the named events.
# Error checking is deliberately minimal, to keep this script simple.
if [ $# -eq 0 ]; then
EVENTS="$(ls ${FLAGS_directory}/uptime-*)"
else
for EV in "$@"; do
EVENTS="$EVENTS ${FLAGS_directory}/uptime-$EV"
done
fi
# Pipeline explained:
# 1st awk program: print times as milliseconds and normalize idle time
# by NCPU.
# sort: sort the events by the uptime timestamp.
# sed: remove '/tmp/uptime-' from the event name.
# 2nd awk program: produce the summarized output
awk '{print 1000*$1, 1000*$2/'$NCPU', FILENAME}' $EVENTS |
sort -k 1n | sed 's=[^ ]*uptime-==' | awk "$SUMMARIZE_TIME"