写在前面

手机部署和推理参考：
https://developer.qualcomm.com/sites/default/files/docs/snpe/tutorial_inceptionv3.html
运行命令snpe-net-run的说明参考：
https://developer.qualcomm.com/sites/default/files/docs/snpe/tools.html
DSP环境配置：
https://developer.qualcomm.com/sites/default/files/docs/snpe/dsp_runtime.html
手机是需要root的

大坑提示：
骁龙855需要用的snpe的版本不能太高，我最后用的1.40成功了，1.66检测不到gpu和dsp；

设置DSP的环境变量ADSP_LIBRARY_PATH的时候和设置LD_LIBRARY_PATH不一样。官网写到：路径之间的间隔不用冒号，而是用分号；路径必须在引号中；三个路径必须包含。但是我用的手机没有/dsp这个路径，我没设，也成功了。

Key points to note when setting the ADSP_LIBRARY_PATH:

Unlike LD_LIBRARY_PATH the path must be contained within quotations. 
Additionally unlike LD_LIBRARY_PATH, the directory separator is a semi-colon, not a colon.

For Android and most embeded linux systems, the 3 paths below MUST be part of ADSP_LIBRARY_PATH. If any of these are missing the DSP runtime may fail.
/system/lib/rfsa/adsp
/system/vendor/lib/rfsa/adsp
/dsp
For embeded linux automotive system, the following DSP paths are required.
/usr/lib/rfsa/adsp
/dsp

1、Push binaries to target

The SNPE SDK provides Linux and Android binaries of snpe-net-run under
，

$SNPE_ROOT/bin/x86_64-linux-clang
$SNPE_ROOT/bin/arm-android-clang6.0
$SNPE_ROOT/bin/aarch64-android-clang6.0
$SNPE_ROOT/bin/aarch64-oe-linux-gcc6.4
$SNPE_ROOT/bin/arm-oe-linux-gcc6.4hf

我们在安卓手机上运行，如果是architecture: armeabi-v7a选择arm-android-clang6.0 ；如果是arm64-v8a，选择aarch64-android-clang6.0
在host的命令行中输入，将必要的lib和bin的内容推到安卓机上。

export SNPE_TARGET_ARCH=arm-android-clang6.0
export SNPE_TARGET_STL=libc++_shared.so

adb shell "mkdir -p /data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/bin"
adb shell "mkdir -p /data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/lib"
adb shell "mkdir -p /data/local/tmp/snpeexample/dsp/lib"

adb push $SNPE_ROOT/lib/$SNPE_TARGET_ARCH/$SNPE_TARGET_STL \
      /data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/lib
adb push $SNPE_ROOT/lib/$SNPE_TARGET_ARCH/*.so \
      /data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/lib
adb push $SNPE_ROOT/lib/dsp/*.so \
      /data/local/tmp/snpeexample/dsp/lib
adb push $SNPE_ROOT/bin/$SNPE_TARGET_ARCH/snpe-net-run \
      /data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/bin

2、将数据和模型推到安卓机上

cd $SNPE_ROOT/models/inception_v3
mkdir data/rawfiles && cp data/cropped/*.raw data/rawfiles/
adb shell "mkdir -p /data/local/tmp/inception_v3"
adb push data/rawfiles /data/local/tmp/inception_v3/cropped
adb push data/target_raw_list.txt /data/local/tmp/inception_v3
adb push dlc/inception_v3_quantized.dlc /data/local/tmp/inception_v3
rm -rf data/rawfiles

3、在安卓机上设置环境变量

好像每次进入一个adb shell都要重设一遍，永久设置的方案我还没试

adb shell
export SNPE_TARGET_ARCH=arm-android-clang6.0
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/lib
export PATH=$PATH:/data/local/tmp/snpeexample/$SNPE_TARGET_ARCH/bin
snpe-net-run -h

4、使用CPU进行推理

输入推理命令，注意对应的文件路径：

cd /data/local/tmp/inception_v3
snpe-net-run --container inception_v3.dlc --input_list target_raw_list.txt

推理的结果默认保存在output下，运行时，使用--output_dir参数，后面加上自己的输出路径

5、使用GPU进行推理

输入推理命令，注意对应的文件路径：snpe-net-run --container inception_v3.dlc --input_list data/cropped/raw_list.txt --output_dir output_gpu --use_gpu

6、使用DSP进行推理

详见“写在前面”的第3条的网页，注意设置环境变量详见“写在前面”的最后一条

# config dsp env
export ADSP_LIBRARY_PATH="/data/local/tmp/incpv3_40/dsp/lib;/system/vendor/lib/rfsa/adsp;/system/system_ext/lib/rfsa/adsp"

输入推理命令

snpe-net-run --container inception_v3_quanti.dlc --input_list data/cropped/raw_list.txt --output_dir output_dsp --use_dsp

结果：
在这里插入图片描述

结果分析

将运行结果从安卓机pull到host上

CPU

(root) root@node2-virtual-machine:/home/node2/snpe/snpe-1.40.0.2130/bin/x86_64-linux-clang# ./snpe-diagview --input_log /home/node2/snpe/inception_demo/output_cpu/SNPEDiag_0.log
Interpreting file serialized with Protobuf
Log File Created: Wed Oct  5 14:07:27 2022
Time Scale: 1e-06
Epoch Timestamp: 1664950047462994 Steady Clock Timestamp: 616682741723
Software library version: 1.40.0.2130

Dnn Runtime Load/Deserialize/Create/De-Init Statistics:
--------------------------------------------------
Load: 124 us
Deserialize: 303082 us
Create: 275542 us

Init: 579341 us
De-Init: 44160 us

Create Network(s): 187526 us
RPC Init Time: 0 us
Snpe Accelerator Init Time: 0 us
Accelerator Init Time: 0 us

Average SNPE Statistics:
------------------------------
Total Inference Time: 283228 us
Forward Propagate Time: 283205 us
RPC Execute Time: 0 us
Snpe Accelerator Time: 0 us
Accelerator Time: 0 us
Misc Accelerator Time: 0 us

Layer Times: 
---------------
0: 10 us : CPU
1: 7026 us : CPU
2: 2484 us : CPU
3: 19498 us : CPU

GPU

(root) root@node2-virtual-machine:/home/node2/snpe/snpe-1.40.0.2130/bin/x86_64-linux-clang# ./snpe-diagview --input_log /home/node2/snpe/inception_demo/output_gpu/SNPEDiag_0.log
Interpreting file serialized with Protobuf
Log File Created: Thu Sep 29 19:55:52 2022
Time Scale: 1e-06
Epoch Timestamp: 1664452552705708 Steady Clock Timestamp: 367353572182
Software library version: 1.40.0.2130

Dnn Runtime Load/Deserialize/Create/De-Init Statistics:
--------------------------------------------------
Load: 148 us
Deserialize: 87545 us
Create: 1481574 us

Init: 1582893 us
De-Init: 66284 us

Create Network(s): 279867 us
RPC Init Time: 0 us
Snpe Accelerator Init Time: 0 us
Accelerator Init Time: 0 us

Average SNPE Statistics:
------------------------------
Total Inference Time: 74891 us
Forward Propagate Time: 74350 us
RPC Execute Time: 0 us
Snpe Accelerator Time: 0 us
Accelerator Time: 0 us
Misc Accelerator Time: 0 us

Layer Times: 
---------------
0: 76 us : GPU
1: 258 us : GPU
2: 104 us : GPU

DSP

(root) root@node2-virtual-machine:/home/node2/snpe/snpe-1.40.0.2130/bin/x86_64-linux-clang# ./snpe-diagview --input_log /home/node2/snpe/inception_demo/output_dsp/SNPEDiag_0.log
Interpreting file serialized with Protobuf
Log File Created: Thu Sep 29 20:24:07 2022
Time Scale: 1e-06
Epoch Timestamp: 1664454247241986 Steady Clock Timestamp: 369048108460
Software library version: 1.40.0.2130

Dnn Runtime Load/Deserialize/Create/De-Init Statistics:
--------------------------------------------------
Load: 139 us
Deserialize: 84410 us
Create: 1255474 us

Init: 1342995 us
De-Init: 53234 us

Create Network(s): 838072 us
RPC Init Time: 318394 us
Snpe Accelerator Init Time: 316750 us
Accelerator Init Time: 309395 us

Average SNPE Statistics:
------------------------------
Total Inference Time: 21012 us
Forward Propagate Time: 20957 us
RPC Execute Time: 19846 us
Snpe Accelerator Time: 18466 us
Accelerator Time: 16913 us
Misc Accelerator Time: 13 us

Layer Times: 
---------------
0: 157 us : DSP
1: 0 us : DSP
2: 291 us : DSP
3: 0 us : DSP

AIP

(root) root@node2-virtual-machine:/home/node2/snpe/snpe-1.40.0.2130/bin/x86_64-linux-clang# ./snpe-diagview --input_log /home/node2/snpe/inception_demo/output_aip/SNPEDiag_0.log
Interpreting file serialized with Protobuf
Log File Created: Tue Oct  4 20:11:14 2022
Time Scale: 1e-06
Epoch Timestamp: 1664885474100794 Steady Clock Timestamp: 558001916484
Software library version: 1.40.0.2130

Dnn Runtime Load/Deserialize/Create/De-Init Statistics:
--------------------------------------------------
Load: 148 us
Deserialize: 25203 us
Create: 393726 us

Init: 420999 us
De-Init: 55800 us

Create Network(s): 17399 us
RPC Init Time: 327292 us
Snpe Accelerator Init Time: 325744 us
Accelerator Init Time: 319019 us

Average SNPE Statistics:
------------------------------
Total Inference Time: 15338 us
Forward Propagate Time: 15280 us
RPC Execute Time: 14311 us
Snpe Accelerator Time: 13306 us
Accelerator Time: 11786 us
Misc Accelerator Time: 25 us

Layer Times: 
---------------
0: 150 us : DSP
1: 0 us : DSP
2: 238 us : DSP
3: 0 us : DSP
4: 247 us : DSP

snpe-platform-validator的使用

这是一个测试设备处理器兼容性的命令。
详见“写在前面”的第2条的网页，注意如果是前面cpu推理是用的arm-android-clang6.0里的，还是aarch64-android-clang6.0 里的内容，这里保持一致。

报错

使用gpu进行推理报错
```
error_code=1006; error_message=Invalid constraint. error_code=1006; error_message=Invalid constraint. 
No GPU device available for target UNKNOWN_SDM; 
error_component=Model Validation; line_no=77; thread_id=535068429568; error_component=Model Validation; line_no=342; thread_id=547735115000
```
```
输入命令：snpe-platform-validator --runtime all
返回：
SNPE is not supported on this SoC.
```
最后的解决方案是把snpe1.66换成了1.40，成功解决。还有一点点小差异是1.66里面用的是aarch64-android-clang8.0，后来换成了arm-android-clang6.0，应该和这里没关系吧。
遇到这种报错其实有点，无从下手，我的思路是广泛查找，csdn，论坛，google，Stack Overflow都看一下，然后列了一下解决思路，然后根据经验一条条试试

https://developer.qualcomm.com/forum/qdn-forums/software/qualcomm-neural-processing-sdk/59207
https://developer.qualcomm.com/forum/qdn-forums/software/snapdragon-neural-processing-engine-sdk/35112

GPU不报错了，DSP推理有报错

The selected runtime is not available on this platform. Continue anyway to observe the failure at network creation time.
error_code=500; error_message=Target runtime is not available. error_code=500; error_message=Target runtime is not available. No viable runtimes available.; error_component=Host Runtime; line_no=328; thread_id=-404725280; error_component=Host Runtime; line_no=271; thread_id=-352988048

仔细看了一下官方文档，应该是环境变量设的有问题。详见文章开头“写在前面”最后一条

mark一下我自己设置时需要用的环境变量

可能和前文有点出入，但也给大家列出来参考一下

# config snpe-net-run env
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/data/local/tmp/incpv3_40/arm-android-clang6.0/lib
export PATH=$PATH:/data/local/tmp/incpv3_40/arm-android-clang6.0/bin

# config snpe-platform-validator
export PATH=$PATH:/data/local/tmp/platformValidator/bin

# config dsp env
export ADSP_LIBRARY_PATH="/data/local/tmp/incpv3_40/dsp/lib;/system/vendor/lib/rfsa/adsp;/system/system_ext/lib/rfsa/adsp"