Charm++ parallel programming system

[Ted Packwood <malice AT cray.com>]

Please note the document your referenced in your first email says:

"Building for Perftools
Do not load perftools or perftools-lite when building Charm++ (perftools-base can
be safely loaded prior to building). Instead, ensure frame pointers are not omitted in
your conv-mach.sh file (this is the new default for Cray XC builds). These options are
provided in the new conv-mach.sh file submitted to the Charm++ developer"

This document was intended for users wanting to build charm++ 6.7.1 (the document
was published prior to the addition of perftools support being added into Charm++
develop). The line "ensure frame pointers are not omitted in your conv-mach.sh file"
is key.

If using v6.7.1, you can do this yourself by adding the following lines to your
conv-mach.sh file.  This will support any PrgEnv on your machine (though PGI
has not been tested).

BUILD_FOR_PERFTOOLS=1   # Comment out if desired

# If building for Cray perftools, use the following.
#   Do not have perftools or perftools-lite loaded during
#     the build of charm++ (perftools-base is ok)
if test -n "$BUILD_FOR_PERFTOOLS"
then
  CRAYPAT_FLAGS=" "
  if test -n "$PGCC"
  then
    CRAYPAT_FLAGS=" "
  elif test -n "$CCE"
  then
    CRAYPAT_FLAGS=" -hkeep_frame_pointer"
  elif test -n "$ICPC"
  then
    CRAYPAT_FLAGS=" -fno-omit-frame-pointer"
  else   # gcc
    CRAYPAT_FLAGS=" -fno-omit-frame-pointer"
  fi
fi

Then change these lines in the same file:
CMK_CC="cc $CRAYPAT_FLAGS "
CMK_CXX="CC $CRAYPAT_FLAGS "

The process (v6.7.1) therefore is:
1) Add the compiler flags to your conv-mach.sh file above
2) Build charm++ as normal, *without* perftools or perftools-lite loaded
3) Load perftools or perftools-lite
4) Build and link your example program.
5) pat_build your program (if using perftools).  (skip this step if using perftools-lite).
6) Run as normal.

I'll work with Phil to ensure that we get all this straightened out in 6.8.0.

If you'd like, I can work with you directly if you have any additional problems.
Ted


On 07/06/2017 11:42 AM, Phil Miller wrote:

Sorry, I messed up the path to touch. It should have been `src/arch/common/conv-mach-perftools.h`

On Thu, Jul 6, 2017 at 11:29 AM, Papatheodore, Thomas L. <papatheodore AT ornl.gov> wrote:

I created the file with “touch”, but I still get the same error:

 

[tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$ touch src/arch/conv-mach-perftools.h

[tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$ ./build charm++ gni-crayxc smp perftools --with-production -g

Error> option: perftools is not supported in this version!

Supported compilers: clang craycc gcc icc iccstatic pgcc xlc xlc64

Supported options: bigemulator bigsim causalft cuda g95 gfortran hugepages ifort lcs mlogft nolb omp ooc papi persistent pgf90 pxshm regularpages smp syncft tsan xpmem

[tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$ ls src/arch/

common                 gni            mpi-crayxc         mpi-linux-mips64  multicore                multicore-linux64       net                net-linux-ppc          netlrts-linux-arm7    pami-bluegeneq      shmem-crayxe  uth-linux            verbs-linux-x86_64

conv-mach-fix.sh       gni-crayxc     mpi-crayxe         mpi-linux-ppc     multicore-arm7           multicore-linux-ppc     net-darwin-x86_64  net-linux-x86_64       netlrts-linux-ppc     pami-linux-ppc64le  sim           uth-linux-x86_64     win

conv-mach-perftools.h  gni-crayxe     mpi-darwin-x86_64  mpi-linux-x86_64  multicore-darwin-x86_64  multicore-linux-x86_64  net-linux          netlrts                netlrts-linux-x86_64  pamilrts            sim-linux     util                 win32

cuda                   mpi            mpi-linux          mpi-win64         multicore-linux          multicore-win64         net-linux-amd64    netlrts-darwin-x86_64  netlrts-win-x86_64    pamilrts-bluegeneq  template      verbs                win64

gemini_gni-crayxe      mpi-bluegeneq  mpi-linux-amd64    mpi-win-x86_64    multicore-linux32        multicore-win-x86_64    net-linux-arm7     netlrts-linux          pami                  shmem               uth           verbs-linux-ppc64le

[tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$

 

Please let me know if there is something else I need to do. Thanks again.

 

-Tom

 

 

 

From: <unmobile AT gmail.com> on behalf of Phil Miller <mille121 AT illinois.edu>
Date: Thursday, July 6, 2017 at 12:18 PM

To: "Papatheodore, Thomas L." <papatheodore AT ornl.gov>
Cc: Ted Packwood <malice AT cray.com>, "charm AT lists.cs.illinois.edu" <charm AT lists.cs.illinois.edu>
Subject: Re: [charm] CrayPat with Charm++

 

On Thu, Jul 6, 2017 at 11:06 AM, Papatheodore, Thomas L. <papatheodore AT ornl.gov> wrote:

I grabbed the latest development version from github (git clone https://charm.cs.illinois.edu/gerrit/charm.git) as described on the charm++ downloads page.

 

The CHANGES file states it is version 6.8.0: What's new in Charm++ 6.8.0

 

[tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$ git describe v6.8.0-beta1-287-gd57c83d

 

OK, I see. In the future, we should label the contents of the CHANGES file tentatively until a final release is tagged and announced.

 

 

There is not a file called “conv-mach-perftools.h” on src/arch/, but there is a “conv-mach-fix.sh”.

 

Indeed there isn't. The intention of the command I asked you to run is to create it - our build script looks for both a header snippet and a shell snippet for build-time options. In this case, the header snippet was missing, and so it thought the option was invalid.

 

 

 

From: <unmobile AT gmail.com> on behalf of Phil Miller <mille121 AT illinois.edu>
Date: Thursday, July 6, 2017 at 11:30 AM
To: "Papatheodore, Thomas L." <papatheodore AT ornl.gov>
Cc: Ted Packwood <malice AT cray.com>, "charm AT lists.cs.illinois.edu" <charm AT lists.cs.illinois.edu>

Subject: Re: [charm] CrayPat with Charm++

 

On Thu, Jul 6, 2017 at 10:20 AM, Papatheodore, Thomas L. <papatheodore AT ornl.gov> wrote:

Hey Phil-

 

Wow! Thanks for the quick and thorough response! I’m using version 6.8.0, but when I add the “perftools” argument I get:

 

Uhhh... Version 6.8.0 hasn't been released yet. We announced a beta of it some months ago, but not the final release. Could you share the name of the file containing the code calling itself Charm++ 6.8.0, and output of 'git describe' in the Charm++ directory?

 

 [tpapathe@titan-ext2: /lustre/atlas2/csc198/proj-shared/tpapathe/charm]$ ./build charm++ gni-crayxc smp perftools --with-production -g

Error> option: perftools is not supported in this version!

Supported compilers: clang craycc gcc icc iccstatic pgcc xlc xlc64

Supported options: bigemulator bigsim causalft cuda g95 gfortran hugepages ifort lcs mlogft nolb omp ooc papi persistent pgf90 pxshm regularpages smp syncft tsan xpmem

 

Is there a version yet that supports this argument? Thanks.

 

This seems to be the result of a mistake on our part. In the charm++ directory, please run

touch src/arch/conv-mach-perftools.h

And then try the build. If that works, please let us know.

 

 

-Tom

 

From: <unmobile AT gmail.com> on behalf of Phil Miller <mille121 AT illinois.edu>
Date: Thursday, July 6, 2017 at 10:18 AM
To: "Papatheodore, Thomas L." <papatheodore AT ornl.gov>, Ted Packwood <malice AT cray.com>
Cc: "charm AT lists.cs.illinois.edu" <charm AT lists.cs.illinois.edu>
Subject: Re: [charm] CrayPat with Charm++

 

Hi Tom,

What version of Charm++ did you use in your attempt(s)? As noted in the linked document, the changes in Charm++ to support CrayPat are in our development line, but have not quite yet been released.

 

Our compiler wrapper 'charmc' has always called through the Cray compiler wrappers on Cray systems. If some component is missing or not working correctly, the problem lies elsewhere.

Looking through that document, there seems to be some skew introduced between the patch to Charm++ as Cray provided it, and what we ultimately integrated. On your Charm++ 'build' command line, you'll need to add the 'perftools' option like so to get all of the necessary compiler settings:

./build charm++ gni-crayxc smp perftools --with-production -g

This difference was introduced (I believe) out of concern for a potential negative performance impact of always applying the flags in question, since they reduce the number of CPU registers available to the compiler.

Also note the lack of 'craycc' option on that line - via Cray's CC, charmc will always use the compiler selected by the loaded PrgEnv-* module.

There may be some other discrepancies between the documentation provided by Cray and the current state of the various software components. Feel free to get back to us with further issues. In the meanwhile, I'll have someone on the Charm++ team walk through the entire process and see what other updates might need to be made.

--

Phil Miller

CTO, Charmworks Inc

 

 

On Thu, Jul 6, 2017 at 8:47 AM, Papatheodore, Thomas L. <papatheodore AT ornl.gov> wrote:

Hello. I am having trouble running CrayPat on a Charm++ example problem on Titan (Cray XK7) at ORNL. The error message that I encounter when trying to instrument the executable with pat_build is:   ERROR: Missing required ELF section '.note.link' from the program '/lustre/atlas2/csc198/proj-shared/tpapathe/test/charm-cuda/multicore-linux-x86_64-cuda/tests/charm++/simplearrayhello/hello'. Load the correct 'perftools' module and rebuild the program.   This error is usually caused by not having the perftools-base and perftools modules loaded before compiling a program. However, I compiled the program with these modules loaded and I still receive the message. I also recompiled Charm++ itself with these modules loaded, but still get the message. Is there anything special I need to do to get CrayPat to profile Charm++ applications? I found the Cray document (http://docs.cray.com/books/S-2802-10//S-2802-10.pdf), but this does not resolve my issue. Could it be that Charm++ compiles with charmc and CrayPat requires the Cray compiler wrappers (e.g. CC, ftn, etc.)?   Any help would be appreciated. Thanks.   -Tom

 

 

 

begin:vcard
fn:Ted Packwood
n:Packwood;Ted
org:Cray Inc.;Performance Engineering
adr;dom:;;380 Jackson St.;St Paul;MN
email;internet:malice AT cray.com
title:Performance Tools Analyst
tel;work:651-605-9037
url:http://www.cray.com
version:2.1
end:vcard