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+===== VSC-3: Performance Report (Allinea) =====
+==== Synopsis: ====
+''perf-report'' is a lightweight profiling tool that provides basic information about where the computing time is actually spent in a given application. It is developed by Allinea [[http://www.allinea.com/products/allinea-performance-reports]] and very simple to use, i.e. by simply inserting the call to ''perf-report'' prior to the usual execution of the program.
+==== VAMPIRTRACE ====
+VAMPIRTRACE is maintained by the computing centre of TU Dresden. Linking the Libraries to your executable Produces profiling and tracing information. Currently it is available for free.
+[[http://tu-dresden.de/die_tu_dresden/zentrale_einrichtungen/zih/forschung/software_werkzeuge_zur_unterstuetzung_von_programmierung_und_optimierung/vampirtrace|VAMPIRTRACE Homepage]]
+Location on VSC-1: ''/opt/vampirtrace''
+==== TAU ====
+Another Tool is TAU, which is provided by different Institutions [[http://www.cs.uoregon.edu/research/tau/docs.php|TAU Homepage]]
+It provides viewing tools for profiles and traces (PARAPROF and JUMPSHOT)
+Location on VSC-1: ''/opt/tau''
+Sample jobscript for generating tracing information using TAU
+   #$ -N tau
+   #$ -q all.q
+   #$ -pe mpich 8
+   #$ -l h_rt=2:0:0
+   mpirun  -m $TMPDIR/machines -np $NSLOTS tau_exec -T PROFILE -T TRACE -io ./vasp''
+This produces .edf and .trc files. Then one has to
+merge these files via:
+<code>
+tau_merge -e events.*.edf -m vasp_events.edf tautrace.*.0.0.trc vasp.trc
+</code>
+and finally the 'vasp.trc' and the 'vasp_events.edf' files need to
+be converted into .slog2 format:
+<code>
+tau2slog2 vasp.trc vasp_events.edf -o vasp.slog2
+</code>
+This file (vasp.slog2) can be visualized with jumpshot.
+===== Visualization of Profiles and Traces =====
+==== VAMPIR ====
+Currently a demo version of [[http://www.vampir.eu|VAMPIR]] is installed on VSC-1. It can visualize VAMPIRTRACE files, as well as other formats such as OTF
+Location on VSC-1: ''/opt/vampir''
+==== JUMPSHOT and PARAPROF ====
+Both are installed together with TAU.
+[[http://www.mcs.anl.gov/research/projects/perfvis/software/viewers/index.htm|JUMPSHOT Homepage]]