#!/bin/sh
# Sergey Senozhatsky, 2015
# sergey.senozhatsky.work@gmail.com
#
# This software is licensed under the terms of the GNU General Public
# License version 2, as published by the Free Software Foundation, and
# may be copied, distributed, and modified under those terms.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# This program is intended to plot a `slabinfo -X' stats, collected,
# for example, using the following command:
# while [ 1 ]; do slabinfo -X >> stats; sleep 1; done
#
# Use `slabinfo-gnuplot.sh stats' to pre-process collected records
# and generate graphs (totals, slabs sorted by size, slabs sorted
# by size).
#
# Graphs can be [individually] regenerate with different ranges and
# size (-r %d,%d and -s %d,%d options).
#
# To visually compare N `totals' graphs, do
# slabinfo-gnuplot.sh -t FILE1-totals FILE2-totals ... FILEN-totals
#
min_slab_name_size=11
xmin=0
xmax=0
width=1500
height=700
mode=preprocess
usage()
{
echo "Usage: [-s W,H] [-r MIN,MAX] [-t|-l] FILE1 [FILE2 ..]"
echo "FILEs must contain 'slabinfo -X' samples"
echo "-t - plot totals for FILE(s)"
echo "-l - plot slabs stats for FILE(s)"
echo "-s %d,%d - set image width and height"
echo "-r %d,%d - use data samples from a given range"
}
check_file_exist()
{
if [ ! -f "$1" ]; then
echo "File '$1' does not exist"
exit 1
fi
}
do_slabs_plotting()
{
local file=$1
local out_file
local range="every ::$xmin"
local xtic=""
local xtic_rotate="norotate"
local lines=2000000
local wc_lines
check_file_exist "$file"
out_file=`basename "$file"`
if [ $xmax -ne 0 ]; then
range="$range::$xmax"
lines=$((xmax-xmin))
fi
wc_lines=`cat "$file" | wc -l`
if [ $? -ne 0 ] || [ "$wc_lines" -eq 0 ] ; then
wc_lines=$lines
fi
if [ "$wc_lines" -lt "$lines" ]; then
lines=$wc_lines
fi
if [ $((width / lines)) -gt $min_slab_name_size ]; then
xtic=":xtic(1)"
xtic_rotate=90
fi
gnuplot -p << EOF
#!/usr/bin/env gnuplot
set terminal png enhanced size $width,$height large
set output '$out_file.png'
set autoscale xy
set xlabel 'samples'
set ylabel 'bytes'
set style histogram columnstacked title textcolor lt -1
set style fill solid 0.15
set xtics rotate $xtic_rotate
set key left above Left title reverse
plot "$file" $range u 2$xtic title 'SIZE' with boxes,\
'' $range u 3 title 'LOSS' with boxes
EOF
if [ $? -eq 0 ]; then
echo "$out_file.png"
fi
}
do_totals_plotting()
{
local gnuplot_cmd=""
local range="every ::$xmin"
local file=""
if [ $xmax -ne 0 ]; then
range="$range::$xmax"
fi
for i in "${t_files[@]}"; do
check_file_exist "$i"
file="$file"`basename "$i"`
gnuplot_cmd="$gnuplot_cmd '$i' $range using 1 title\
'$i Memory usage' with lines,"
gnuplot_cmd="$gnuplot_cmd '' $range using 2 title \
'$i Loss' with lines,"
done
gnuplot -p << EOF
#!/usr/bin/env gnuplot
set terminal png enhanced size $width,$height large
set autoscale xy
set output '$file.png'
set xlabel 'samples'
set ylabel 'bytes'
set key left above Left title reverse
plot $gnuplot_cmd
EOF
if [ $? -eq 0 ]; then
echo "$file.png"
fi
}
do_preprocess()
{
local out
local lines
local in=$1
check_file_exist "$in"
# use only 'TOP' slab (biggest memory usage or loss)
let lines=3
out=`basename "$in"`"-slabs-by-loss"
`cat "$in" | grep -A "$lines" 'Slabs sorted by loss' |\
egrep -iv '\-\-|Name|Slabs'\
| awk '{print $1" "$4+$2*$3" "$4}' > "$out"`
if [ $? -eq 0 ]; then
do_slabs_plotting "$out"
fi
let lines=3
out=`basename "$in"`"-slabs-by-size"
`cat "$in" | grep -A "$lines" 'Slabs sorted by size' |\
egrep -iv '\-\-|Name|Slabs'\
| awk '{print $1" "$4" "$4-$2*$3}' > "$out"`
if [ $? -eq 0 ]; then
do_slabs_plotting "$out"
fi
out=`basename "$in"`"-totals"
`cat "$in" | grep "Memory used" |\
awk '{print $3" "$7}' > "$out"`
if [ $? -eq 0 ]; then
t_files[0]=$out
do_totals_plotting
fi
}
parse_opts()
{
local opt
while getopts "tlr::s::h" opt; do
case $opt in
t)
mode=totals
;;
l)
mode=slabs
;;
s)
array=(${OPTARG//,/ })
width=${array[0]}
height=${array[1]}
;;
r)
array=(${OPTARG//,/ })
xmin=${array[0]}
xmax=${array[1]}
;;
h)
usage
exit 0
;;
\?)
echo "Invalid option: -$OPTARG" >&2
exit 1
;;
:)
echo "-$OPTARG requires an argument." >&2
exit 1
;;
esac
done
return $OPTIND
}
parse_args()
{
local idx=0
local p
for p in "$@"; do
case $mode in
preprocess)
files[$idx]=$p
idx=$idx+1
;;
totals)
t_files[$idx]=$p
idx=$idx+1
;;
slabs)
files[$idx]=$p
idx=$idx+1
;;
esac
done
}
parse_opts "$@"
argstart=$?
parse_args "${@:$argstart}"
if [ ${#files[@]} -eq 0 ] && [ ${#t_files[@]} -eq 0 ]; then
usage
exit 1
fi
case $mode in
preprocess)
for i in "${files[@]}"; do
do_preprocess "$i"
done
;;
totals)
do_totals_plotting
;;
slabs)
for i in "${files[@]}"; do
do_slabs_plotting "$i"
done
;;
*)
echo "Unknown mode $mode" >&2
usage
exit 1
;;
esac
c46626e62745aa8e1a982626efca8b121d /net/sunrpc/Makefile
| parent | c14024dbb156c8392908aaa822097d27c6af8ec8 (diff) |
|---|
block: don't try Write Same from __blkdev_issue_zeroout
Write Same can return an error asynchronously if it turns out the
underlying SCSI device does not support Write Same, which makes a
proper fallback to other methods in __blkdev_issue_zeroout impossible.
Thus only issue a Write Same from blkdev_issue_zeroout an don't try it
at all from __blkdev_issue_zeroout as a non-invasive workaround.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout")
Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <axboe@fb.com>