mirror of
https://github.com/gabime/spdlog.git
synced 2025-09-28 17:19:34 +08:00
astyle
This commit is contained in:
gabime
130
bench/Makefile
130
bench/Makefile
@@ -1,65 +1,65 @@
|
||||
CXX ?= g++
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CXXFLAGS = -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -Wl,--no-as-needed -I../include
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CXX_RELEASE_FLAGS = -O3 -flto -DNDEBUG
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||||
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binaries=spdlog-bench spdlog-bench-mt spdlog-async zf_log-bench zf_log-bench-mt boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
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all: $(binaries)
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spdlog-bench: spdlog-bench.cpp
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$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
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spdlog-bench-mt: spdlog-bench-mt.cpp
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$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
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spdlog-async: spdlog-async.cpp
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$(CXX) spdlog-async.cpp -o spdlog-async $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
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ZF_LOG_FLAGS = -I../../zf_log.git/zf_log/
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zf_log-bench: zf_log-bench.cpp
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$(CXX) zf_log-bench.cpp -o zf_log-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
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zf_log-bench-mt: zf_log-bench-mt.cpp
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$(CXX) zf_log-bench-mt.cpp -o zf_log-bench-mt $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
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BOOST_FLAGS = -DBOOST_LOG_DYN_LINK -I/usr/include -lboost_log -lboost_log_setup -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono
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||||
|
||||
boost-bench: boost-bench.cpp
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$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
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||||
|
||||
boost-bench-mt: boost-bench-mt.cpp
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$(CXX) boost-bench-mt.cpp -o boost-bench-mt $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
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GLOG_FLAGS = -lglog
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glog-bench: glog-bench.cpp
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$(CXX) glog-bench.cpp -o glog-bench $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
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glog-bench-mt: glog-bench-mt.cpp
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$(CXX) glog-bench-mt.cpp -o glog-bench-mt $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
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|
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|
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G2LOG_FLAGS = -I/home/gabi/devel/g2log/g2log/src -L/home/gabi/devel/g2log/g2log -llib_g2logger
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g2log-async: g2log-async.cpp
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$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
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|
||||
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EASYL_FLAGS = -I../../easylogging/src/
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easylogging-bench: easylogging-bench.cpp
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$(CXX) easylogging-bench.cpp -o easylogging-bench $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
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||||
easylogging-bench-mt: easylogging-bench-mt.cpp
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$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
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|
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.PHONY: clean
|
||||
|
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clean:
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rm -f *.o logs/* $(binaries)
|
||||
|
||||
|
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rebuild: clean all
|
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|
||||
|
||||
|
||||
CXX ?= g++
|
||||
CXXFLAGS = -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -Wl,--no-as-needed -I../include
|
||||
CXX_RELEASE_FLAGS = -O3 -flto -DNDEBUG
|
||||
|
||||
|
||||
binaries=spdlog-bench spdlog-bench-mt spdlog-async zf_log-bench zf_log-bench-mt boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
|
||||
|
||||
all: $(binaries)
|
||||
|
||||
spdlog-bench: spdlog-bench.cpp
|
||||
$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
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||||
|
||||
spdlog-bench-mt: spdlog-bench-mt.cpp
|
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$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
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||||
|
||||
spdlog-async: spdlog-async.cpp
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$(CXX) spdlog-async.cpp -o spdlog-async $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
|
||||
|
||||
|
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ZF_LOG_FLAGS = -I../../zf_log.git/zf_log/
|
||||
zf_log-bench: zf_log-bench.cpp
|
||||
$(CXX) zf_log-bench.cpp -o zf_log-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
|
||||
|
||||
zf_log-bench-mt: zf_log-bench-mt.cpp
|
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$(CXX) zf_log-bench-mt.cpp -o zf_log-bench-mt $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
|
||||
|
||||
|
||||
BOOST_FLAGS = -DBOOST_LOG_DYN_LINK -I/usr/include -lboost_log -lboost_log_setup -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono
|
||||
|
||||
boost-bench: boost-bench.cpp
|
||||
$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
|
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|
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boost-bench-mt: boost-bench-mt.cpp
|
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$(CXX) boost-bench-mt.cpp -o boost-bench-mt $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
|
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|
||||
|
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GLOG_FLAGS = -lglog
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glog-bench: glog-bench.cpp
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$(CXX) glog-bench.cpp -o glog-bench $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
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|
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glog-bench-mt: glog-bench-mt.cpp
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$(CXX) glog-bench-mt.cpp -o glog-bench-mt $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
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|
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|
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G2LOG_FLAGS = -I/home/gabi/devel/g2log/g2log/src -L/home/gabi/devel/g2log/g2log -llib_g2logger
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g2log-async: g2log-async.cpp
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$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
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|
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|
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EASYL_FLAGS = -I../../easylogging/src/
|
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easylogging-bench: easylogging-bench.cpp
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||||
$(CXX) easylogging-bench.cpp -o easylogging-bench $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
|
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easylogging-bench-mt: easylogging-bench-mt.cpp
|
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$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
|
||||
|
||||
.PHONY: clean
|
||||
|
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clean:
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||||
rm -f *.o logs/* $(binaries)
|
||||
|
||||
|
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rebuild: clean all
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||||
|
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|
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152
bench/run_all.sh
152
bench/run_all.sh
@@ -1,76 +1,76 @@
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#~/bin/bash
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#execute each bench 3 times and print the timing
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exec 2>&1
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|
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#execute and time given exe 3 times
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bench_exe ()
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||||
{
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||||
echo "**************** $1 ****************"
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for i in {1..3}; do
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time ./$1 $2;
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rm -f logs/*
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sleep 3
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done;
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}
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|
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#execute given async tests 3 times (timing is already builtin)
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bench_async ()
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{
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echo "**************** $1 ****************"
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for i in {1..3}; do
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./$1 $2;
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echo
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rm -f logs/*
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sleep 3
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done;
|
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}
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||||
|
||||
|
||||
echo "----------------------------------------------------------"
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echo "Single threaded benchmarks.. (1 thread, 1,000,000 lines)"
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echo "----------------------------------------------------------"
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for exe in boost-bench glog-bench easylogging-bench zf_log-bench spdlog-bench;
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||||
do
|
||||
bench_exe $exe 1
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||||
done;
|
||||
|
||||
echo "----------------------------------------------------------"
|
||||
echo "Multi threaded benchmarks.. (10 threads, 1,000,000 lines)"
|
||||
echo "----------------------------------------------------------"
|
||||
for exe in boost-bench-mt glog-bench-mt easylogging-bench-mt zf_log-bench-mt spdlog-bench-mt;
|
||||
do
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||||
bench_exe $exe 10
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||||
done;
|
||||
|
||||
echo "----------------------------------------------------------"
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||||
echo "Multi threaded benchmarks.. (100 threads, 1,000,000 lines)"
|
||||
echo "----------------------------------------------------------"
|
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for exe in boost-bench-mt glog-bench-mt easylogging-bench-mt zf_log-bench-mt spdlog-bench-mt;
|
||||
do
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bench_exe $exe 100
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done;
|
||||
|
||||
echo "---------------------------------------------------------------"
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echo "Async, single threaded benchmark.. (1 thread, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
|
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for exe in spdlog-async g2log-async
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||||
do
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bench_async $exe 1
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done;
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||||
|
||||
echo "---------------------------------------------------------------"
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||||
echo "Async, multi threaded benchmark.. (10 threads, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
|
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for exe in spdlog-async g2log-async
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||||
do
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||||
bench_async $exe 10
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done;
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||||
|
||||
echo "---------------------------------------------------------------"
|
||||
echo "Async, multi threaded benchmark.. (100 threads, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
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for exe in spdlog-async g2log-async
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||||
do
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bench_async $exe 100
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||||
done;
|
||||
#~/bin/bash
|
||||
#execute each bench 3 times and print the timing
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||||
|
||||
exec 2>&1
|
||||
|
||||
#execute and time given exe 3 times
|
||||
bench_exe ()
|
||||
{
|
||||
echo "**************** $1 ****************"
|
||||
for i in {1..3}; do
|
||||
time ./$1 $2;
|
||||
rm -f logs/*
|
||||
sleep 3
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||||
done;
|
||||
}
|
||||
|
||||
#execute given async tests 3 times (timing is already builtin)
|
||||
bench_async ()
|
||||
{
|
||||
echo "**************** $1 ****************"
|
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for i in {1..3}; do
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./$1 $2;
|
||||
echo
|
||||
rm -f logs/*
|
||||
sleep 3
|
||||
done;
|
||||
}
|
||||
|
||||
|
||||
echo "----------------------------------------------------------"
|
||||
echo "Single threaded benchmarks.. (1 thread, 1,000,000 lines)"
|
||||
echo "----------------------------------------------------------"
|
||||
for exe in boost-bench glog-bench easylogging-bench zf_log-bench spdlog-bench;
|
||||
do
|
||||
bench_exe $exe 1
|
||||
done;
|
||||
|
||||
echo "----------------------------------------------------------"
|
||||
echo "Multi threaded benchmarks.. (10 threads, 1,000,000 lines)"
|
||||
echo "----------------------------------------------------------"
|
||||
for exe in boost-bench-mt glog-bench-mt easylogging-bench-mt zf_log-bench-mt spdlog-bench-mt;
|
||||
do
|
||||
bench_exe $exe 10
|
||||
done;
|
||||
|
||||
echo "----------------------------------------------------------"
|
||||
echo "Multi threaded benchmarks.. (100 threads, 1,000,000 lines)"
|
||||
echo "----------------------------------------------------------"
|
||||
for exe in boost-bench-mt glog-bench-mt easylogging-bench-mt zf_log-bench-mt spdlog-bench-mt;
|
||||
do
|
||||
bench_exe $exe 100
|
||||
done;
|
||||
|
||||
echo "---------------------------------------------------------------"
|
||||
echo "Async, single threaded benchmark.. (1 thread, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
|
||||
for exe in spdlog-async g2log-async
|
||||
do
|
||||
bench_async $exe 1
|
||||
done;
|
||||
|
||||
echo "---------------------------------------------------------------"
|
||||
echo "Async, multi threaded benchmark.. (10 threads, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
|
||||
for exe in spdlog-async g2log-async
|
||||
do
|
||||
bench_async $exe 10
|
||||
done;
|
||||
|
||||
echo "---------------------------------------------------------------"
|
||||
echo "Async, multi threaded benchmark.. (100 threads, 1,000,000 lines)"
|
||||
echo "---------------------------------------------------------------"
|
||||
for exe in spdlog-async g2log-async
|
||||
do
|
||||
bench_async $exe 100
|
||||
done;
|
||||
|
||||
@@ -1,62 +1,62 @@
|
||||
//
|
||||
// Copyright(c) 2015 Gabi Melman.
|
||||
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
|
||||
//
|
||||
|
||||
#include <thread>
|
||||
#include <vector>
|
||||
#include <atomic>
|
||||
#include <iostream>
|
||||
#include <chrono>
|
||||
#include <cstdlib>
|
||||
#include "spdlog/spdlog.h"
|
||||
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
|
||||
using namespace std::chrono;
|
||||
using clock=steady_clock;
|
||||
namespace spd = spdlog;
|
||||
|
||||
int thread_count = 10;
|
||||
if(argc > 1)
|
||||
thread_count = ::atoi(argv[1]);
|
||||
int howmany = 1000000;
|
||||
|
||||
spd::set_async_mode(1048576);
|
||||
auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "logs/spd-bench-async.txt", false);
|
||||
logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
|
||||
|
||||
|
||||
std::atomic<int > msg_counter {0};
|
||||
vector<thread> threads;
|
||||
auto start = clock::now();
|
||||
for (int t = 0; t < thread_count; ++t)
|
||||
{
|
||||
threads.push_back(std::thread([&]()
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
int counter = ++msg_counter;
|
||||
if (counter > howmany) break;
|
||||
logger->info() << "spdlog message #" << counter << ": This is some text for your pleasure";
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
for(auto &t:threads)
|
||||
{
|
||||
t.join();
|
||||
};
|
||||
|
||||
duration<float> delta = clock::now() - start;
|
||||
float deltaf = delta.count();
|
||||
auto rate = howmany/deltaf;
|
||||
|
||||
cout << "Total: " << howmany << std::endl;
|
||||
cout << "Threads: " << thread_count << std::endl;
|
||||
std::cout << "Delta = " << deltaf << " seconds" << std::endl;
|
||||
std::cout << "Rate = " << rate << "/sec" << std::endl;
|
||||
}
|
||||
//
|
||||
// Copyright(c) 2015 Gabi Melman.
|
||||
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
|
||||
//
|
||||
|
||||
#include <thread>
|
||||
#include <vector>
|
||||
#include <atomic>
|
||||
#include <iostream>
|
||||
#include <chrono>
|
||||
#include <cstdlib>
|
||||
#include "spdlog/spdlog.h"
|
||||
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
|
||||
using namespace std::chrono;
|
||||
using clock=steady_clock;
|
||||
namespace spd = spdlog;
|
||||
|
||||
int thread_count = 10;
|
||||
if(argc > 1)
|
||||
thread_count = ::atoi(argv[1]);
|
||||
int howmany = 1000000;
|
||||
|
||||
spd::set_async_mode(1048576);
|
||||
auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "logs/spd-bench-async.txt", false);
|
||||
logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
|
||||
|
||||
|
||||
std::atomic<int > msg_counter {0};
|
||||
vector<thread> threads;
|
||||
auto start = clock::now();
|
||||
for (int t = 0; t < thread_count; ++t)
|
||||
{
|
||||
threads.push_back(std::thread([&]()
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
int counter = ++msg_counter;
|
||||
if (counter > howmany) break;
|
||||
logger->info() << "spdlog message #" << counter << ": This is some text for your pleasure";
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
for(auto &t:threads)
|
||||
{
|
||||
t.join();
|
||||
};
|
||||
|
||||
duration<float> delta = clock::now() - start;
|
||||
float deltaf = delta.count();
|
||||
auto rate = howmany/deltaf;
|
||||
|
||||
cout << "Total: " << howmany << std::endl;
|
||||
cout << "Threads: " << thread_count << std::endl;
|
||||
std::cout << "Delta = " << deltaf << " seconds" << std::endl;
|
||||
std::cout << "Rate = " << rate << "/sec" << std::endl;
|
||||
}
|
||||
|
||||
@@ -1,56 +1,56 @@
|
||||
#include <thread>
|
||||
#include <vector>
|
||||
#include <atomic>
|
||||
#include <cstdlib>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
#include <zf_log.c>
|
||||
|
||||
const char g_path[] = "logs/zf_log.txt";
|
||||
int g_fd;
|
||||
|
||||
static void output_callback(zf_log_message *msg)
|
||||
{
|
||||
*msg->p = '\n';
|
||||
write(g_fd, msg->buf, msg->p - msg->buf + 1);
|
||||
}
|
||||
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
g_fd = open(g_path, O_APPEND|O_CREAT|O_WRONLY);
|
||||
if (0 > g_fd)
|
||||
{
|
||||
ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
|
||||
return -1;
|
||||
}
|
||||
zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
|
||||
|
||||
int thread_count = 10;
|
||||
if(argc > 1)
|
||||
thread_count = std::atoi(argv[1]);
|
||||
int howmany = 1000000;
|
||||
std::atomic<int > msg_counter {0};
|
||||
vector<thread> threads;
|
||||
|
||||
for (int t = 0; t < thread_count; ++t)
|
||||
{
|
||||
threads.push_back(std::thread([&]()
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
int counter = ++msg_counter;
|
||||
if (counter > howmany) break;
|
||||
ZF_LOGI("zf_log message #%i: This is some text for your pleasure", counter);
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
for (auto &t:threads)
|
||||
{
|
||||
t.join();
|
||||
};
|
||||
close(g_fd);
|
||||
return 0;
|
||||
}
|
||||
#include <thread>
|
||||
#include <vector>
|
||||
#include <atomic>
|
||||
#include <cstdlib>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
#include <zf_log.c>
|
||||
|
||||
const char g_path[] = "logs/zf_log.txt";
|
||||
int g_fd;
|
||||
|
||||
static void output_callback(zf_log_message *msg)
|
||||
{
|
||||
*msg->p = '\n';
|
||||
write(g_fd, msg->buf, msg->p - msg->buf + 1);
|
||||
}
|
||||
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
g_fd = open(g_path, O_APPEND|O_CREAT|O_WRONLY);
|
||||
if (0 > g_fd)
|
||||
{
|
||||
ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
|
||||
return -1;
|
||||
}
|
||||
zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
|
||||
|
||||
int thread_count = 10;
|
||||
if(argc > 1)
|
||||
thread_count = std::atoi(argv[1]);
|
||||
int howmany = 1000000;
|
||||
std::atomic<int > msg_counter {0};
|
||||
vector<thread> threads;
|
||||
|
||||
for (int t = 0; t < thread_count; ++t)
|
||||
{
|
||||
threads.push_back(std::thread([&]()
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
int counter = ++msg_counter;
|
||||
if (counter > howmany) break;
|
||||
ZF_LOGI("zf_log message #%i: This is some text for your pleasure", counter);
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
for (auto &t:threads)
|
||||
{
|
||||
t.join();
|
||||
};
|
||||
close(g_fd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@@ -1,27 +1,28 @@
|
||||
#include <stdio.h>
|
||||
#include <zf_log.c>
|
||||
|
||||
const char g_path[] = "logs/zf_log.txt";
|
||||
static FILE *g_f;
|
||||
|
||||
static void output_callback(zf_log_message *msg)
|
||||
{
|
||||
*msg->p = '\n';
|
||||
fwrite(msg->buf, msg->p - msg->buf + 1, 1, g_f);
|
||||
}
|
||||
|
||||
int main(int, char* [])
|
||||
{
|
||||
g_f = fopen(g_path, "wb");
|
||||
if (!g_f) {
|
||||
ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
|
||||
return -1;
|
||||
}
|
||||
zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
|
||||
|
||||
const int howmany = 1000000;
|
||||
for(int i = 0 ; i < howmany; ++i)
|
||||
ZF_LOGI("zf_log message #%i: This is some text for your pleasure", i);
|
||||
fclose(g_f);
|
||||
return 0;
|
||||
}
|
||||
#include <stdio.h>
|
||||
#include <zf_log.c>
|
||||
|
||||
const char g_path[] = "logs/zf_log.txt";
|
||||
static FILE *g_f;
|
||||
|
||||
static void output_callback(zf_log_message *msg)
|
||||
{
|
||||
*msg->p = '\n';
|
||||
fwrite(msg->buf, msg->p - msg->buf + 1, 1, g_f);
|
||||
}
|
||||
|
||||
int main(int, char* [])
|
||||
{
|
||||
g_f = fopen(g_path, "wb");
|
||||
if (!g_f)
|
||||
{
|
||||
ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
|
||||
return -1;
|
||||
}
|
||||
zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
|
||||
|
||||
const int howmany = 1000000;
|
||||
for(int i = 0 ; i < howmany; ++i)
|
||||
ZF_LOGI("zf_log message #%i: This is some text for your pleasure", i);
|
||||
fclose(g_f);
|
||||
return 0;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user