GPU3 back in business

[Kirthevasan Kandasamy]

Predrag,

Following up on matlab and cuda 7.5.
- It seems as if Matlab is not installed on gpu2 and gpu3. Can we have it
installed even without GPU support. In most cases, when I use matlab for my
gpu experiments, I will be executing an external python command which can
call the GPU.
- Also, on gpu2/3 as Dougal suggested can we also install cuda 7.5, but
default to 8.0?

thanks,
samy

On Fri, Oct 21, 2016 at 5:07 PM, Dougal Sutherland <dougal at gmail.com> wrote:

> I don't think it would be a bad thing to have both versions of cuda
> installed and default to 8.0. To use 7.5 for matlab you probably just have
> to write a wrapper script to set LD_LIBRARY_FLAGS appropriately.
>
> On Fri, Oct 21, 2016 at 9:21 PM Kirthevasan Kandasamy <kandasamy at cmu.edu>
> wrote:
>
>> Hi all,
>>
>> I was planning on using Matlab with GPUs for one of my projects.
>> Can we please keep gpu2 as it is for now?
>>
>> samy
>>
>> On Fri, Oct 21, 2016 at 3:54 PM, Barnabas Poczos <bapoczos at cs.cmu.edu>
>> wrote:
>>
>> Sounds good. Let us have tensorflow system wide on all GPU nodes. We
>> can worry about Matlab later.
>>
>> Best,
>> B
>> ======================
>> Barnabas Poczos, PhD
>> Assistant Professor
>> Machine Learning Department
>> Carnegie Mellon University
>>
>>
>> On Fri, Oct 21, 2016 at 3:50 PM, Predrag Punosevac <predragp at cs.cmu.edu>
>> wrote:
>> > Barnabas Poczos <bapoczos at cs.cmu.edu> wrote:
>> >
>> >> Hi Predrag,
>> >>
>> >> If there is no other solution, then I think it is OK not to have
>> >> Matlab on GPU2 and GPU3.
>> >> Tensorflow has higher priority on these nodes.
>> >
>> > We could possibly have multiple CUDA libraries for different versions
>> > but that is going to bite us for the rear end quickly. People who want
>> > to use MATLAB with GPUs will have to live with GPU1 probably until
>> > Spring release of MATLAB.
>> >
>> > Predrag
>> >
>> >>
>> >> Best,
>> >> Barnabas
>> >>
>> >>
>> >>
>> >>
>> >> ======================
>> >> Barnabas Poczos, PhD
>> >> Assistant Professor
>> >> Machine Learning Department
>> >> Carnegie Mellon University
>> >>
>> >>
>> >> On Fri, Oct 21, 2016 at 3:37 PM, Predrag Punosevac <
>> predragp at cs.cmu.edu> wrote:
>> >> > Dougal Sutherland <dougal at gmail.com> wrote:
>> >> >
>> >> >
>> >> > Sorry that I am late for the party. This is my interpretation of
>> what we
>> >> > should do.
>> >> >
>> >> > 1. I will go back to CUDA 8.0 which will brake MATLAB. We have to
>> live
>> >> > with it. Barnabas please OK this. I will work with MathWorks for
>> this to
>> >> > be fixed for 2017a release.
>> >> >
>> >> > 2. Then I could install TensorFlow compiled by Dougal system wide.
>> >> > Please Dugal after I upgrade back to 8.0 recompile it again using
>> CUDA
>> >> > 8.0. I could give you the root password so that you can compile and
>> >> > install directly.
>> >> >
>> >> > 3. If everyone is OK with above I will pull the trigger on GPU3 at
>> >> > 4:30PM and upgrade to 8.0
>> >> >
>> >> > 4. MATLAB will be broken on GPU2 as well after I put Titan cards
>> during
>> >> > the October 25 power outrage.
>> >> >
>> >> > Predrag
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >> Heh. :)
>> >> >>
>> >> >> An explanation:
>> >> >>
>> >> >>    - Different nvidia gpu architectures are called "compute
>> capabilities".
>> >> >>    This is a number that describes the behavior of the card: the
>> maximum size
>> >> >>    of various things, which API functions it supports, etc. There's
>> a
>> >> >>    reference here
>> >> >>    <https://en.wikipedia.org/wiki/CUDA#Version_features_
>> and_specifications>,
>> >> >>    but it shouldn't really matter.
>> >> >>    - When CUDA compiles code, it targets a certain architecture,
>> since it
>> >> >>    needs to know what features to use and whatnot. I *think* that
>> if you
>> >> >>    compile for compute capability x, it will work on a card with
>> compute
>> >> >>    capability y approximately iff x <= y.
>> >> >>    - Pascal Titan Xs, like gpu3 has, have compute capability 6.1.
>> >> >>    - CUDA 7.5 doesn't know about compute capability 6.1, so if you
>> ask to
>> >> >>    compile for 6.1 it crashes.
>> >> >>    - Theano by default tries to compile for the capability of the
>> card, but
>> >> >>    can be configured to compile for a different capability.
>> >> >>    - Tensorflow asks for a list of capabilities to compile for when
>> you
>> >> >>    build it in the first place.
>> >> >>
>> >> >>
>> >> >> On Fri, Oct 21, 2016 at 8:17 PM Dougal Sutherland <dougal at gmail.com>
>> wrote:
>> >> >>
>> >> >> > They do work with 7.5 if you specify an older compute
>> architecture; it's
>> >> >> > just that their actual compute capability of 6.1 isn't supported
>> by cuda
>> >> >> > 7.5. Thank is thrown off by this, for example, but it can be
>> fixed by
>> >> >> > telling it to pass compute capability 5.2 (for example) to nvcc.
>> I don't
>> >> >> > think that this was my problem with building tensorflow on 7.5;
>> I'm not
>> >> >> > sure what that was.
>> >> >> >
>> >> >> > On Fri, Oct 21, 2016, 8:11 PM Kirthevasan Kandasamy <
>> kandasamy at cmu.edu>
>> >> >> > wrote:
>> >> >> >
>> >> >> > Thanks Dougal. I'll take a look atthis and get back to you.
>> >> >> > So are you suggesting that this is an issue with TitanX's not
>> being
>> >> >> > compatible with 7.5?
>> >> >> >
>> >> >> > On Fri, Oct 21, 2016 at 3:08 PM, Dougal Sutherland <
>> dougal at gmail.com>
>> >> >> > wrote:
>> >> >> >
>> >> >> > I installed it in my scratch directory (not sure if there's a
>> global
>> >> >> > install?). The main thing was to put its cache on scratch; it got
>> really
>> >> >> > upset when the cache directory was on NFS. (Instructions at the
>> bottom of
>> >> >> > my previous email.)
>> >> >> >
>> >> >> > On Fri, Oct 21, 2016, 8:04 PM Barnabas Poczos <
>> bapoczos at cs.cmu.edu> wrote:
>> >> >> >
>> >> >> > That's great! Thanks Dougal.
>> >> >> >
>> >> >> > As I remember bazel was not installed correctly previously on
>> GPU3. Do
>> >> >> > you know what went wrong with it before and why it is good now?
>> >> >> >
>> >> >> > Thanks,
>> >> >> > Barnabas
>> >> >> > ======================
>> >> >> > Barnabas Poczos, PhD
>> >> >> > Assistant Professor
>> >> >> > Machine Learning Department
>> >> >> > Carnegie Mellon University
>> >> >> >
>> >> >> >
>> >> >> > On Fri, Oct 21, 2016 at 2:03 PM, Dougal Sutherland <
>> dougal at gmail.com>
>> >> >> > wrote:
>> >> >> > > I was just able to build tensorflow 0.11.0rc0 on gpu3! I used
>> the cuda
>> >> >> > 8.0
>> >> >> > > install, and it built fine. So additionally installing 7.5 was
>> probably
>> >> >> > not
>> >> >> > > necessary; in fact, cuda 7.5 doesn't know about the 6.1 compute
>> >> >> > architecture
>> >> >> > > that the Titan Xs use, so Theano at least needs to be manually
>> told to
>> >> >> > use
>> >> >> > > an older architecture.
>> >> >> > >
>> >> >> > > A pip package is in ~dsutherl/tensorflow-0.11.0rc0-py2-none-any.whl.
>> I
>> >> >> > think
>> >> >> > > it should work fine with the cudnn in my scratch directory.
>> >> >> > >
>> >> >> > > You should probably install it to scratch, either running this
>> first to
>> >> >> > put
>> >> >> > > libraries your scratch directory or using a virtualenv or
>> something:
>> >> >> > > export PYTHONUSERBASE=/home/scratch/$USER/.local
>> >> >> > >
>> >> >> > > You'll need this to use the library and probably to install it:
>> >> >> > > export
>> >> >> > >
>> >> >> > LD_LIBRARY_PATH=/home/scratch/dsutherl/cudnn-8.0-5.1/cuda/
>> lib64:"$LD_LIBRARY_PATH"
>> >> >> > >
>> >> >> > > To install:
>> >> >> > > pip install --user ~dsutherl/tensorflow-0.11.
>> 0rc0-py2-none-any.whl
>> >> >> > > (remove --user if you're using a virtualenv)
>> >> >> > >
>> >> >> > > (A request: I'm submitting to ICLR in two weeks, and for some
>> of the
>> >> >> > models
>> >> >> > > I'm running gpu3's cards are 4x the speed of gpu1 or 2's. So
>> please don't
>> >> >> > > run a ton of stuff on gpu3 unless you're working on a deadline
>> too.
>> >> >> > >
>> >> >> > >
>> >> >> > >
>> >> >> > > Steps to install it, for the future:
>> >> >> > >
>> >> >> > > Install bazel in your home directory:
>> >> >> > >
>> >> >> > > wget
>> >> >> > >
>> >> >> > https://github.com/bazelbuild/bazel/releases/download/0.3.2/
>> bazel-0.3.2-installer-linux-x86_64.sh
>> >> >> > > bash bazel-0.3.2-installer-linux-x86_64.sh
>> --prefix=/home/scratch/$USER
>> >> >> > > --base=/home/scratch/$USER/.bazel
>> >> >> > >
>> >> >> > > Configure bazel to build in scratch. There's probably a better
>> way to do
>> >> >> > > this, but this works:
>> >> >> > >
>> >> >> > > mkdir /home/scratch/$USER/.cache
>> >> >> > > ln -s /home/scratch/$USER/.cache/bazel ~/.cache/bazel
>> >> >> > >
>> >> >> > > Build tensorflow. Note that builds from git checkouts don't
>> work, because
>> >> >> > > they assume a newer version of git than is on gpu3:
>> >> >> > >
>> >> >> > > cd /home/scratch/$USER
>> >> >> > > wget
>> >> >> > > tar xf
>> >> >> > > cd tensorflow-0.11.0rc0
>> >> >> > > ./configure
>> >> >> > >
>> >> >> > > This is an interactive script that doesn't seem to let you pass
>> >> >> > arguments or
>> >> >> > > anything. It's obnoxious.
>> >> >> > > Use the default python
>> >> >> > > don't use cloud platform or hadoop file system
>> >> >> > > use the default site-packages path if it asks
>> >> >> > > build with GPU support
>> >> >> > > default gcc
>> >> >> > > default Cuda SDK version
>> >> >> > > specify /usr/local/cuda-8.0
>> >> >> > > default cudnn version
>> >> >> > > specify $CUDNN_DIR from use-cudnn.sh, e.g.
>> >> >> > > /home/scratch/dsutherl/cudnn-8.0-5.1/cuda
>> >> >> > > Pascal Titan Xs have compute capability 6.1
>> >> >> > >
>> >> >> > > bazel build -c opt --config=cuda
>> >> >> > > //tensorflow/tools/pip_package:build_pip_package
>> >> >> > > bazel-bin/tensorflow/tools/pip_package/build_pip_package ./
>> >> >> > > A .whl file, e.g. tensorflow-0.11.0rc0-py2-none-any.whl, is
>> put in the
>> >> >> > > directory you specified above.
>> >> >> > >
>> >> >> > >
>> >> >> > > - Dougal
>> >> >> > >
>> >> >> > >
>> >> >> > > On Fri, Oct 21, 2016 at 6:14 PM Kirthevasan Kandasamy <
>> kandasamy at cmu.edu
>> >> >> > >
>> >> >> > > wrote:
>> >> >> > >>
>> >> >> > >> Predrag,
>> >> >> > >>
>> >> >> > >> Any updates on gpu3?
>> >> >> > >> I have tried both tensorflow and chainer and in both cases the
>> problem
>> >> >> > >> seems to be with cuda
>> >> >> > >>
>> >> >> > >> On Wed, Oct 19, 2016 at 4:10 PM, Predrag Punosevac <
>> predragp at cs.cmu.edu
>> >> >> > >
>> >> >> > >> wrote:
>> >> >> > >>>
>> >> >> > >>> Dougal Sutherland <dougal at gmail.com> wrote:
>> >> >> > >>>
>> >> >> > >>> > I tried for a while. I failed.
>> >> >> > >>> >
>> >> >> > >>>
>> >> >> > >>> Damn this doesn't look good. I guess back to the drawing
>> board. Thanks
>> >> >> > >>> for the quick feed back.
>> >> >> > >>>
>> >> >> > >>> Predrag
>> >> >> > >>>
>> >> >> > >>> > Version 0.10.0 fails immediately on build: "The specified
>> >> >> > >>> > --crosstool_top
>> >> >> > >>> > '@local_config_cuda//crosstool:crosstool' is not a valid
>> >> >> > >>> > cc_toolchain_suite
>> >> >> > >>> > rule." Apparently this is because 0.10 required an older
>> version of
>> >> >> > >>> > bazel (
>> >> >> > >>> > https://github.com/tensorflow/tensorflow/issues/4368), and
>> I don't
>> >> >> > have
>> >> >> > >>> > the
>> >> >> > >>> > energy to install an old version of bazel.
>> >> >> > >>> >
>> >> >> > >>> > Version 0.11.0rc0 gets almost done and then complains about
>> no such
>> >> >> > >>> > file or
>> >> >> > >>> > directory for libcudart.so.7.5 (which is there, where I told
>> >> >> > tensorflow
>> >> >> > >>> > it
>> >> >> > >>> > was...).
>> >> >> > >>> >
>> >> >> > >>> > Non-release versions from git fail immediately because they
>> call git
>> >> >> > -C
>> >> >> > >>> > to
>> >> >> > >>> > get version info, which is only in git 1.9 (we have 1.8).
>> >> >> > >>> >
>> >> >> > >>> >
>> >> >> > >>> > Some other notes:
>> >> >> > >>> > - I made a symlink from ~/.cache/bazel to
>> >> >> > >>> > /home/scratch/$USER/.cache/bazel,
>> >> >> > >>> > because bazel is the worst. (It complains about doing
>> things on NFS,
>> >> >> > >>> > and
>> >> >> > >>> > hung for me [clock-related?], and I can't find a global
>> config file
>> >> >> > or
>> >> >> > >>> > anything to change that in; it seems like there might be
>> one, but
>> >> >> > their
>> >> >> > >>> > documentation is terrible.)
>> >> >> > >>> >
>> >> >> > >>> > - I wasn't able to use the actual Titan X compute
>> capability of 6.1,
>> >> >> > >>> > because that requires cuda 8; I used 5.2 instead. Probably
>> not a huge
>> >> >> > >>> > deal,
>> >> >> > >>> > but I don't know.
>> >> >> > >>> >
>> >> >> > >>> > - I tried explicitly including /usr/local/cuda/lib64 in
>> >> >> > LD_LIBRARY_PATH
>> >> >> > >>> > and
>> >> >> > >>> > set CUDA_HOME to /usr/local/cuda before building, hoping
>> that would
>> >> >> > >>> > help
>> >> >> > >>> > with the 0.11.0rc0 problem, but it didn't.
>> >> >> > >>
>> >> >> > >>
>> >> >> > >
>> >> >> >
>> >> >> >
>> >> >> >
>>
>>
>>
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