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# Flat profiler
#
# Copyright (C) 2016 Patrick "P. J." McDermott
#
# This file is part of the Eggshell Profiler.
#
# The Eggshell Profiler is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# The Eggshell Profiler 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.
#
# You should have received a copy of the GNU General Public License
# along with the Eggshell Profiler. If not, see
# <http://www.gnu.org/licenses/>.
sp=
fn_name=
fn_start_time=
fn_end_time=
fns=
total_runtime=
sp_inc()
{
sp=$((${sp} + 1))
}
sp_dec()
{
sp=$((${sp} - 1))
}
frame_set()
{
local p="${1}"
shift 1
eval "frame_${p}_name=\${fn_name}"
eval "frame_${p}_time=0"
}
frame_get()
{
local p="${1}"
shift 1
eval "fn_name=\${frame_${p}_name}"
eval "fn_time=\${frame_${p}_time}"
}
frame_unset()
{
local p="${1}"
shift 1
unset "frame_${p}_name"
unset "frame_${p}_time"
}
frame_inc_time()
{
local p="${1}"
local value="${2}"
eval "frame_${p}_time=\$((\${frame_${p}_time} + \${value}))"
}
frame_dec_time()
{
local p="${1}"
local value="${2}"
eval "frame_${p}_time=\$((\${frame_${p}_time} - \${value}))"
}
ctxsw()
{
local prev_sp="${1}"
local next_sp="${2}"
local time="${3}"
shift 2
frame_inc_time ${prev_sp} ${time}
frame_dec_time ${next_sp} ${time}
}
record()
{
local name="${1}"
local time="${2}"
shift 2
case " ${fns} " in
*" ${name} "*)
eval "fn_timing_${name}=\$((\${fn_timing_${name}} + \
\${time}))"
eval "fn_calls_${name}=\$((\${fn_calls_${name}} + 1))"
;;
*)
eval "fn_timing_${name}=\${time}"
eval "fn_calls_${name}=1"
fns="${fns} ${name}"
;;
esac
total_runtime=$((${total_runtime} + ${time}))
}
fn_begin()
{
local name="${1}"
local time="${2}"
shift 2
local old_sp=
old_sp=${sp}
sp_inc
fn_name="${name}"
frame_set ${sp}
ctxsw ${old_sp} ${sp} ${time}
}
fn_end()
{
local name="${1}"
local time="${2}"
shift 2
local old_sp=
old_sp=${sp}
sp_dec
ctxsw ${old_sp} ${sp} ${time}
frame_get ${old_sp}
record ${fn_name} ${fn_time}
frame_unset ${old_sp}
}
read_profile()
{
local profile="${1}"
shift 1
while read time change fn; do
# Convert to int.
time="${time%.*}${time#*.}"
case "${change}" in
'B')
fn_begin "${fn}" "${time}"
;;
'E')
fn_end "${fn}" "${time}"
;;
esac
done <"${profile}"
}
show_table()
{
local fn=
local time=
local percent=
local calls=
printf ' self\n'
printf '%% time seconds calls name\n'
for fn in ${fns}; do
eval "time=\${fn_timing_${fn}}"
percent=$(printf 'scale = 2; 100 * %d / %d\n' \
${time} ${total_runtime} | bc)
time=$(printf 'scale = 9; %d / 1000000000\n' ${time} | bc)
eval "calls=\${fn_calls_${fn}}"
printf '%6.2f ' ${percent}
printf '%14.9f ' ${time}
printf '%8d ' ${calls}
printf '%s\n' "${fn}"
done | sort -nr -k 1,4
}
flat_profile()
{
local profile="${1}"
shift 1
sp=0
fn_name=''
fn_time=0
fns=''
total_runtime=0
read_profile "${profile}"
show_table
}
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