caffe make runtest error（core dumped）Check failed: status == CUDNN_STATUS_SUCCESS (6 vs. 0)

参考了谷歌论坛

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简单讲就是GPU的加速性能不够，CUDNN只支持CUDA Capability 3.0以上的GPU加速

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在实验室台式机上(I7+GeForce GTX TITAN Black With CUDA CAPABILITY 3.5)成功配置caffe并测试数据无误、训练数据也开始以后，也打算笔记本上(I5+GEFORCE GT540M--With CUDA CAPABILITY 2.1)配上caffe.

于是安装了cuda和cudnn加速，make和make test都过了，而make runtest时报错，大概是这样滴错误

 [----------] 6 tests from CuDNNConvolutionLayerTest/1, where TypeParam = double
 [ RUN      ] CuDNNConvolutionLayerTest/1.TestSimpleConvolutionGroupCuDNN
 F1014 08:55:30.083176 23568 cudnn_conv_layer.cpp:30] Check failed: status == CUDNN_STATUS_SUCCESS (6 vs. 0)  CUDNN_STATUS_ARCH_MISMATCH
 *** Check failure stack trace: ***
     @     0x2b082d0a8daa  (unknown)
     @     0x2b082d0a8ce4  (unknown)
     @     0x2b082d0a86e6  (unknown)
     @     0x2b082d0ab687  (unknown)
     @           0x739689  caffe::CuDNNConvolutionLayer<>::LayerSetUp()
     @           0x42c1f0  caffe::Layer<>::SetUp()
     @           0x49d776  caffe::CuDNNConvolutionLayerTest_TestSimpleConvolutionGroupCuDNN_Test<>::TestBody()
     @           0x68d613  testing::internal::HandleExceptionsInMethodIfSupported<>()
     @           0x6840b7  testing::Test::Run()
     @           0x68415e  testing::TestInfo::Run()
     @           0x684265  testing::TestCase::Run()
     @           0x6875a8  testing::internal::UnitTestImpl::RunAllTests()
     @           0x687837  testing::UnitTest::Run()
     @           0x41e9d0  main
     @     0x2b0831cf1ec5  (unknown)
     @           0x4261c7  (unknown)
     @              (nil)  (unknown)
 make: *** [runtest] Aborted (core dumped) caffe::NetTest_TestReshape_Test<>::TestBody()
     @           0x68d613  testing::internal::HandleExceptionsInMethodIfSupported<>()
     @           0x6840b7  testing::Test::Run()
     @           0x68415e  testing::TestInfo::Run()
     @           0x684265  testing::TestCase::Run()
     @           0x6875a8  testing::internal::UnitTestImpl::RunAllTests()
     @           0x687837  testing::UnitTest::Run()
     @           0x41e9d0  main
     @     0x2b2a9f778ec5  (unknown)
     @           0x4261c7  (unknown)
     @              (nil)  (unknown)
 make: *** [runtest] Aborted (core dumped)

在内网找了半天无果，终于在墙外找到了解决办法，不，是问题所在。 因为笔记本上的GT540M的CUDA Capability是2.1,而官方的cudnn加速是不支持3.0以下的版本的，因此只能在Makefile.config中注释掉USE_CUDNN这行，重新执行以下

 make clean
 make all -j4
 make test -j4
 make runtest -j4

最后除了make runtest中2 DISABLED TESTS之外，没有其他问题。make runtest中出现几个测试例子不过不影响使用。