#! /bin/sh
# PCP QA Test No. 412
# Test out wrapping on libpcp/interp
#
#  Test the creation and reading of an archive created using pmlogger(1) and
#  and pmval(1).  On IRIX 6.2 and earlier, this test purposely sets the TZ
#  variable to specify daylight savings using the extended format, in a way
#  that does not break libc.so.
#
# Copyright (c) 1995-2002 Silicon Graphics, Inc.  All Rights Reserved.
#

seq=`basename $0`
echo "QA output created by $seq"

# get standard environment, filters and checks
. ./common.product
. ./common.filter
. ./common.check

signal=$PCP_BINADM_DIR/pmsignal
status=1	# failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15

_wrap_off()
{
    dowrap=0
    unset PCP_COUNTER_WRAP
    echo "--- Wrapping OFF ---"
}

_wrap_on()
{
    dowrap=1
    PCP_COUNTER_WRAP=
    export PCP_COUNTER_WRAP
    echo "--- Wrapping ON ---"
}

_isLaterThanIRIX62 () {
    if [ "$PCP_PLATFORM" = irix ]
    then
    	STAT=`uname -a | $PCP_AWK_PROG '
BEGIN	{ status = 0 }
1   	{
    	    x = $3
    	    if (x > 6.2) status = "0"
    	    else status = "1"
    	}
END 	{ print status }
'`
    else
    	STAT=2	#  not an IRIX platform
    fi

    return $STAT
}

_setTimeZone () {
    MONTH=`date +%m`
    
    if [ $MONTH -lt 7 ]
    then
    	#  Daylight savings on from Sunday 1st January to
    	#  Sunday 5th March
        TZ="EST-10EDT-11,1/0,64/3"
    else
    	#  Daylight savings on from Sunday 29th October to Wednesday
    	#  "32nd" December (including the end of the extra day for
    	#  leap years)
    	TZ="EST-10EDT-11,302/2,367/0"
    fi
    
    #  This is what the specification should be normally, but
    #  it won't work because the start date of daylight savings
    #  is AFTER the end date.  libc.so hates this, so I hate
    #  libc.so.
    #TZ="EST-10EDT-11,302/2,64/3"
    
    echo $TZ
}

#
# Reset the sample agent so that we start from a known
# point for the wrap metrics
#
_reset()
{
    pmstore sample.control -1 >/dev/null
    $sudo $signal -a -s HUP pmcd
    _wait_for_pmcd
}

#
# Simulate interpolated fetching with/without wrapping
# Assumes doing it for sample.wrap.ulong
#
_process_log()
{
    $PCP_AWK_PROG -v dowrap=$dowrap -v half_delta=$half_delta '
      BEGIN {
	    maxuint = 4294967295;
	    debug=0
      }
      $2 == "29.0.58" { 
	    curr_time = $1;
	    curr_value = $5;
	    gsub(/^.*:/, "", curr_time);
	    if (prev_time != 0) {
		delta = curr_time - prev_time;
		if (delta < 0) delta += 60; # delta wrap :-)
		if (debug)
		    printf("delta=%s;curr=%s;prev=%s\n", delta, curr_time, prev_time);

		#x = (prev_value + curr_value) / 2.0
		x = (curr_value - prev_value) / delta * half_delta;
		x += prev_value;

		if (curr_value < prev_value && dowrap) { # then wrap
		    new_curr_value = curr_value + maxuint;

		    x = (new_curr_value - prev_value) / delta * half_delta;
		    x += prev_value;

		    if (x > maxuint) x -= maxuint; # wrap back if necessary
		}
		printf "%15.0d\n",x; 
	    }
	    prev_time = curr_time;
	    prev_value = curr_value;
      }
    ' <$tmp.dump
}

#
# Note the time of the first sample.wrap value
#
_set_starttime()
{
    $PCP_AWK_PROG '
      $2 == "29.0.58" { 
		printf("starttime=%s\n", $1);
	        exit 0;
      }
    ' <$tmp.dump >$tmp.starttime
    eval `cat $tmp.starttime`
}

#
# Get out the interp values using pmval
#
_pmval_log()
{
    echo >>$seq.full
    echo "--- pmval ---" >>$seq.full
    pmval -w 15 -f 0 -r -a $tmp.archive -S "@$starttime" -O $half_delta -t $delta \
      sample.wrap.ulong \
    | tee -a $seq.full \
    | sed \
	-e '/metric/,/interval/d' \
	-e '/^[ 	]*$/d' \
	-e 's/^[^ ][^ ]*  *//'
}

#
# Compare values allowing for an error
#
_compare_results()
{
    echo >>$seq.full
    echo "--- paste ---" >>$seq.full
    error=1e+08
    paste $tmp.1 $tmp.2 \
    | tee -a $seq.full \
    | $PCP_AWK_PROG -v error=$error ' {
	    diff = $1-$2; 
	    if (diff < 0) diff *= -1; 
	    if (diff > error) 
		printf("mismatch: %f, %f (diff=%f)\n", $1, $2, diff);
	    else
		printf("match\n");
    }'
}

rm -f $seq.full

# real QA test starts here

delta=2
half_delta=1

_isLaterThanIRIX62
if [ $? = 1 ]
then
    TZ=`_setTimeZone`	    #  this forces the timezone to be correct and
    export TZ	    	    #  problem-free on IRIX 6.2 and earlier.
fi

_reset
cat <<EOF >$tmp.config
log advisory on $delta second {
    sample.wrap.ulong
} 
EOF
pmlogger -c $tmp.config -s5 -l$tmp.log $tmp.archive
if [ $? -ne 0 ]
then
    echo "Archive failed to be created !"
    cat $tmp.log
    exit 1
    fi
pmdumplog $tmp.archive >$tmp.dump
echo >>$seq.full
echo "--- pmdumplog ---" >>$seq.full
cat $tmp.dump >>$seq.full
_set_starttime

_wrap_off
_process_log >$tmp.1
echo >>$seq.full
echo "--- process_log wrap_off ---" >>$seq.full
cat $tmp.1 >>$seq.full
_pmval_log >$tmp.2
echo >>$seq.full
echo "--- process pmval ---" >>$seq.full
cat $tmp.2 >>$seq.full
_compare_results

_wrap_on
_process_log >$tmp.1
echo >>$seq.full
echo "--- process_log wrap_on ---" >>$seq.full
cat $tmp.1 >>$seq.full
_pmval_log >$tmp.2
echo >>$seq.full
echo "--- process pmval ---" >>$seq.full
cat $tmp.2 >>$seq.full
_compare_results

# success, all done
status=0
exit