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--- cluster:195 [2020/07/24 14:48]
hmeij07 [Summary]
+++ cluster:195 [2020/07/25 14:09] (current)
hmeij07 [Summary]
@@ Line 19: / Line 19: @@
 ...
 # From lammps developer...
-# Try switching to the ondemand governor with tuned-adm.
+# Try switching to the performance governor with tuned-adm.
 /usr/lib/tuned/ondemand/tuned.conf:
@@ Line 26: / Line 26: @@
 [cpu]
-governor=ondemand
+governor=performance
-$ tuned-adm profile ondemand
+$ tuned-adm profile performance
 </code>
@@ Line 211: / Line 211: @@
 Minutes processing times of multiple runs for the colloid lammps example.
-^    ^    greentail52  ^  n79  ^  n79 perf  ^
+^    ^    greentail52  ^  n79  ^  n79 perf  ^  n79 hpc-perf  ^
-|  no mpirun  |  7:30  |  7:43  |  0:07:08  |
+|  no mpirun  |  7:30  |  7:43  |  0:07:08  |  0:08:22  |
-|  mpirun -n 1  |  7:29  |  11:33  |    |
+|  mpirun -n 1  |  7:29  |  11:33  |  0:07:12  |  0:08:23  |
-|  mpirun -n 2   |  3:57  |  6:02  |    |
+|  mpirun -n 2  |  3:57  |  6:02  |  0:03:45  |  0:04:19  |
-|  mpirun -n 4  |  2:16  |  3:44  |    |
+|  mpirun -n 4  |  2:16  |  3:44  |  0:02:09  |  0:02:28  |
-|  mpirun -n 8  |  1:21  |  2:15  |  0:01:20  |
+|  mpirun -n 8  |  1:21  |  2:15  |  0:01:20  |  0:01:27  |
-|  mpirun -n 12  |    |    |  0:01:08  |
+|  mpirun -n 12  |    |    |  0:01:08  |  0:01:11  |
-|  mpirun -n 24  |    |    |  0:00:49  |
+|  mpirun -n 24  |    |    |  0:00:49  |  0:00:49  |
-The "n79 perf" column are the results after I create a tuned profile named "performance" (per lammps developer top of this page) and then switch to that profile using ''tuned-adm'' and echo the string "performanc" in relevant ''/proc'' files.  Also **does not matter** if I run the lmp_mpi version (compiled on ''greentail'' or lmp_mpi-n79 compiled on ''n79''.  Yea.
+The "n79 perf" column are the results after I create a tuned profile named "performance" and then switch to that profile using ''tuned-adm'' and echo the string "performance" in relevant ''/sys'' files.  Also **does not matter** if I run the lmp_mpi version (compiled on ''greentail'') or lmp_mpi-n79 (compiled on ''n79'').  Yea.
+The ""n79 hpc-perf" column are the results after I splice the ''/usr/lib/tuned/hpc-compute/tuned.conf'' settings into my "performance" profile above. Contains a lot of memory settings.  We swap out "throughput-performance" for "latency-performance" and make sure the section ''[cpu]'' still points to performance.
+Going with the short version, comment out all other options. We can enable when needed.
+<code>
+# original
+[main]
+include=throughput-performance
+[cpu]
+governor=performance
+# current files
+  for i in \
+`ls  /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor`;\
+ do echo performance >  $i; done
+  cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
+# holds on reboot? yes
+  cd /usr/lib/tuned/
+  mkdir performance
+  vi performance/tuned.conf
+  tuned-adm profile
+  tuned-adm profile performance
+  tuned-adm active
+</code>
 \\

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