Re: Reduce the frequency of load balancer output

From: Jim Phillips (jim_at_ks.uiuc.edu)
Date: Tue May 10 2011 - 19:12:30 CDT

The load balancer options are not documented because they are supposed to
be automatic, they may change between releases, and the optimal settings
may change over time. The output is there so that if there is a
performance problem there is some information to diagnose it with. If it
bothers you you can crank up ldbPeriod or just filter every line starting
with "LDB:" out of the log file with "grep -v ^LDB:" (in CygWin).

-Jim

On Tue, 19 Apr 2011, Ajasja LjubetiÄ~M wrote:

> Dear all,
>
> How could I reduce or limit the output of the LDB? An example of what I
> would like to get rid of in my log file is shown below.
>
> Also, am I missing something or is the firstLdbStep not documented? (then
> probably there is also a lastLdbStep and a ldbPeriod. Is there a LDBoutput
> as well?)
>
> I'm running NAMD 2.8b1 for Win32-multicore.
>
> Best regards,
> Ajasja Ljubetič
>
>
>
>
> The last position output (seq=660000) takes 0.000 seconds, 29.594 MB of
> memory in use
> LDB: ============= START OF LOAD BALANCING ============== 506.341
> LDB: ============== END OF LOAD BALANCING =============== 506.341
> LDB: =============== DONE WITH MIGRATION ================ 506.341
> LDB: ============= START OF LOAD BALANCING ============== 506.419
> LDB: Largest compute 120 load 0.032000 is 74.6% of average load 0.042875
> LDB: Average compute 0.002221 is 5.2% of average load 0.042875
> LDB: TIME 506.419 LOAD: AVG 0.0428751 MAX 0.0780001 PROXIES: TOTAL 10 MAXPE
> 2 MAXPATCH 3 None MEM: 29.5938 MB
> LDB: TIME 506.419 LOAD: AVG 0.0428751 MAX 0.0780001 PROXIES: TOTAL 14 MAXPE
> 3 MAXPATCH 4 RefineTorusLB MEM: 29.5938 MB
> LDB: TIME 506.419 LOAD: AVG 0.0428751 MAX 0.0619998 PROXIES: TOTAL 14 MAXPE
> 3 MAXPATCH 4 RefineTorusLB MEM: 29.5938 MB
> LDB: ============== END OF LOAD BALANCING =============== 506.419
> LDB: =============== DONE WITH MIGRATION ================ 506.419
> LDB: ============= START OF LOAD BALANCING ============== 508.775
> LDB: ============== END OF LOAD BALANCING =============== 508.775
> LDB: =============== DONE WITH MIGRATION ================ 508.775
> LDB: ============= START OF LOAD BALANCING ============== 508.837
> LDB: Largest compute 42 load 0.046000 is 82.1% of average load 0.056000
> LDB: Average compute 0.002743 is 4.9% of average load 0.056000
> LDB: TIME 508.837 LOAD: AVG 0.056 MAX 0.062 PROXIES: TOTAL 10 MAXPE 2
> MAXPATCH 3 None MEM: 29.5938 MB
> LDB: TIME 508.837 LOAD: AVG 0.056 MAX 0.062 PROXIES: TOTAL 14 MAXPE 3
> MAXPATCH 4 RefineTorusLB MEM: 29.5938 MB
> LDB: TIME 508.837 LOAD: AVG 0.056 MAX 0.062 PROXIES: TOTAL 14 MAXPE 3
> MAXPATCH 4 RefineTorusLB MEM: 29.5938 MB
> LDB: ============== END OF LOAD BALANCING =============== 508.837
> LDB: =============== DONE WITH MIGRATION ================ 508.837
> LDB: ============= START OF LOAD BALANCING ============== 511.131
> LDB: ============== END OF LOAD BALANCING =============== 511.131
> LDB: =============== DONE WITH MIGRATION ================ 511.131
> LDB: ============= START OF LOAD BALANCING ============== 511.193
> LDB: Largest compute 89 load 0.031000 is 73.6% of average load 0.042125
> LDB: Average compute 0.001885 is 4.5% of average load 0.042125
> LDB: TIME 511.193 LOAD: AVG 0.042125 MAX 0.062 PROXIES: TOTAL 10 MAXPE 2
> MAXPATCH 3 None MEM: 29.5938 MB
> LDB: TIME 511.193 LOAD: AVG 0.042125 MAX 0.062 PROXIES: TOTAL 14 MAXPE 3
> MAXPATCH 4 RefineTorusLB MEM: 29.5938 MB
> LDB: TIME 511.193 LOAD: AVG 0.042125 MAX 0.0469999 PROXIES: TOTAL 17 MAXPE
> 4 MAXPATCH 5 RefineTorusLB MEM: 29.5938 MB
> LDB: ============== END OF LOAD BALANCING =============== 511.193
> LDB: =============== DONE WITH MIGRATION ================ 511.193
>

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