My colleague gives me a `face_recognization.so`, `face_recognization.so`
use `libcaffe.so`.
I compiled it with cgo based on arm.
cgo code:
package algo
/*
#include "load_so.h"
#cgo CFLAGS: -std=gnu99
#cgo LDFLAGS: -ldl
#cgo LDFLAGS: -L./ -L/usr/lib -L/usr/local/lib -L/usr/lib
-L/usr/local/cuda/lib -L/home/ubuntu/caffe_gx/caffe/.build_release/lib
-lcaffe -lcudart -lcublas -lcurand -lglog -lgflags -lprotobuf
-lboost_system -lboost_filesystem -lm -lhdf5_hl -lhdf5 -lleveldb -lsnappy
-llmdb -lopencv_core -lopencv_highgui -lopencv_imgproc -lboost_thread
-lstdc++ -lcudnn -lcblas -latlas -lopencv_ml -lopencv_objdetect
-lopencv_imgproc -lboost_thread -lstdc++ -lcblas -latlas -lopencv_core
-lopencv_highgui -lopencv_imgproc -lboost_thread -lstdc++ -lboost_python
-lboost_filesystem -lboost_system -lboost_thread -lboost_serialization
-lopencv_ml -L./ -lface_recognization
*/
import "C"
import "unsafe"
func ExtractFeature(bytes []byte) ([]float32, error) {
...
errCode := C.extractFeature(pInput, inSize, pOuput,
(*C.int)(unsafe.Pointer(&outSize)), (C.int)(mode))
...
}
In load_so.c, I use `dl_open` to load relative function.
void init(char* pDir){
soHandle = dlopen("./libface_recognization.so", RTLD_LAZY);
if (!soHandle) {
fprintf(stderr, "open so fail: %s\n", dlerror());
return;
}
// feature extraction
...
extract = (fptr_model_extract)dlsym(soHandle, "Face_Feature_Extract");
if (!extract){
fprintf(stderr, "dlsym Face_Feature_Extract fail: %s\n", dlerror());
return;
}
...
}
int extractFeature(char* input, int inLen, float* output, int* outLen,
int mode){
(*extract)(featureHandle, (const char*)input, inLen, output,
outLen, mode);;
}
Calling relationship:
` func ExtractFeature` in golang --> `extractFeature` in load_so.c -->
`Face_Feature_Extract` in face_rec.so --> libcaffe.so
1. In his C++ demo, `Face_Feature_Extract` function always cost 0.1 second.
2. In my golang code, the `extractFeature` in load_so.c costs 1.8 or 0.1
second, sometimes the caffe function in libcaffe.so spent 1.8 second,
sometimes it is normal.
3. If I loop `extractFeature` function 1000 times in `load_so.c`, average
execution time is 0.1 second.
PS:
go env:
GOARCH="arm"
GOBIN=""
GOEXE=""
GOHOSTARCH="arm"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/ubuntu/GoProjects"
GORACE=""
GOROOT="/home/ubuntu/golang/go17armv6l"
GOTOOLDIR="/home/ubuntu/golang/go17armv6l/pkg/tool/linux_arm"
CC="gcc"
GOGCCFLAGS="-fPIC -marm -pthread -fmessage-length=0
-fdebug-prefix-map=/tmp/go-build518500973=/tmp/go-build
-gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
hardware:
nvidia jetson tx1
uname -a:
Linux tegra-ubuntu 3.10.96-tegra #1 SMP PREEMPT Tue May 17 16:31:40 PDT
2016 aarch64 aarch64 aarch64 GNU/Linux
I doubt that cgo1.7 is not stable, anybody can help me?
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