Difference between revisions of "Profiling with IPM and Vampir"

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NCI has a variety of profiling tools that can be helpful to use when developing. IPM is a low-overhead way to collect messaging information, while Vampir/Trace Analyser is a more in-depth profiler.
 
NCI has a variety of profiling tools that can be helpful to use when developing. IPM is a low-overhead way to collect messaging information, while Vampir/Trace Analyser is a more in-depth profiler.
  

Revision as of 01:21, 18 March 2019

Template:Pre UM10 This information is only for versions of the UM before 10.0

NCI has a variety of profiling tools that can be helpful to use when developing. IPM is a low-overhead way to collect messaging information, while Vampir/Trace Analyser is a more in-depth profiler.

To use these with the UM some hand-edits are provided. You don't need to recompile when you add IPM, but you will with Vampir and Trace Analyser.

IPM

To run

Add this handedit to Input/Output Control->User hand edit files in the UMUI

~access/umui_jobs/hand_edits/profiling/ipm.sh

To view

OpenMPI

When using OpenMPI IPM creates an xml file in the UM output directory, who's name consists of your user name plus a timestamp. ipm_view is used to display the file, showing a number of graphs with the call time and load balance.

$ module load ipm
$ ipm_view $DATAOUTPUT/$USER/saatd/saw562.1346035173.302475.0

Ipm.png | NCI IPM notes

Intel MPI

Intel MPI's IPM produces a text file with communications information

$ cat $DATAOUTPUT/$USER/saatc/stats.txt
Intel(R) MPI Library Version 4.0 Update 3
<u>__ MPI Communication Statistics __</u>

Stats level: 3
P2P scope:< FULL >
Collectives scope:< FULL >

[[user:ScottWales | 1346044901]] Process 0 of 4 on node vayu2 lifetime = 394501.92

Data Transfers
Src     Dst     Amount(MB)      Transfers
-----------------------------------------
000 --> 000     0.000000e+00    0
000 --> 001     5.019608e-01    6
000 --> 002     1.968384e-03    2
000 --> 003     0.000000e+00    0
=========================================
Totals          5.039291e-01    8

Communication Activity
Operation       Volume(MB)      Calls
-----------------------------------------
P2P
Csend           3.929138e-03    4
Send            5.000000e-01    4
Bsend           0.000000e+00    0
Rsend           0.000000e+00    0

| Intel-MPI docs

Vampir

To run

Add this handedit to Input/Output Control->User hand edit files in the UMUI

~access/umui_jobs/hand_edits/profiling/vampir.sh

To view

OpenMPI

When using OpenMPI the vampir utility is used to view the output files and graph the call timeline

$ module load vampir
$ vampir $DATAOUTPUT/$USER/saatd/saatd.otf

Vampir.png | Vampir docs

Intel MPI

Intel has its own version of Vampir, called Trace Analyser. It has a similar function, to view graphs of call timelines etc. use the Charts menu.

$ module load intel-itac
$ traceanalyser $DATAOUTPUT/$USER/saatc/saatc.stf

Itac.png | Trace Collector docs | Trace Analyser docs