tensorflow: Optimisations do not seem to be active during building

When building Tensorflow with Bazel master following the instructions in #2109 , I get many warnings like:

In file included from third_party/gpus/cuda/include/host_config.h:161:0,
                 from third_party/gpus/cuda/include/cuda_runtime.h:76,
                 from <command-line>:0:
/usr/include/features.h:328:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
 #  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
    ^

In fact, running a simple network on TF built by me and linked against Cudnn 5 is10% slower than the wheel built by Google against the default Cudnn.

About this issue

Original URL
State: closed
Created 8 years ago
Reactions: 1
Comments: 17 (5 by maintainers)

Most upvoted comments

@girving, nvm, my bad. I had wrongly installed the wrong packages. The warnings are gone if I use my locally compiled once with “-march=native -O3”

Thanks,

Nick

XapaJIaMnu on May 10, 2017