Aips++/Gildas test

2003-07-10
Data Set Processing on iralx7

The processing was made on a AMD 1532 Mhz PC with 768 Mbytes of memory and 256kButes of cache memory. All data was on a local disk.

The following graphs show the relative time spent in each step of each package on the iralx7 computer

Gildas results

Nant 8 16 32 64
Program Clic08 Clic16 Clic32 Clic64
filler 16.0 56.5 227.2 1098.5
init 1.2 12.2 63.2 286.5
phcor 3.5 20.5 100.8 464.8
rf passband 5.0 34.2 265.2 2275.0
phase 1.5 9.8 103.5 1298.5
flux 3.2 6.8 68.2 841.5
ampli 1.5 7.0 77.0 920.8
total calibration 14.8 78.2 614.8 5800.5
table 6.2 29.8 154.5 665.2
imaging 22.5 22.8 40.5 190.5
total 60.8 199.5 1100.2 8041.2

Aips++ results

Nant 8 16 32 64
Program aips++ aips++ aips++ aips++
filler 135.2 337.4 1092.7 4096.0
init 27.5 120.6 650.4 2242.9
phcor 22.9 79.3 302.8 1282.5
rf passband 28.5 118.0 709.1 5811.6
phase 23.6 84.6 565.9 14865.3
flux 0.0 0.0 0.2 0.2
ampli 21.1 76.5 514.6 12646.9
total calibration 96.1 358.3 2092.7 34606.6
table 72.4 105.3 478.0 2410.4
imaging 138.2 162.8 313.5 153.9
total 469.3 1084.4 4627.3 43509.8

Ratio aips++/gildas

Nant 8 16 32 64
Program ratio ratio ratio ratio
filler 8.4 6.0 4.8 3.7
init 22.0 9.8 10.3 7.8
phcor 6.5 3.9 3.0 2.8
rf passband 5.7 3.4 2.7 2.6
phase 15.7 8.7 5.5 11.4
flux 0.0 0.0 0.0 0.0
ampli 14.1 10.9 6.7 13.7
total calibration 6.5 4.6 3.4 6.0
table 11.6 3.5 3.1 3.6
imaging 6.1 7.2 7.7 0.8
total 7.7 5.4 4.2 5.4

Gildas Images

3mm images (8,16,32,64 antennas)

1mm images (8,16,32,64 antennas)

hco images (8,16,32,64 antennas)

co images (8,16,32,64 antennas)

Aips++ Images