ORCHIDEE performance (trunk revision 3623)

In order to test Orchidee performance several decisions have been done. Check the details below:

• Trunk
• Revision 3623
• In Curie
• Production mode
  • XIOS
  • IOIPSL
  • Orchidee
• Real CPU Time
• XIOS library

Note: the total cpu time can be calculated by multiplying with the numbers of MPI used.

Table 1: Orchidee Scalability

Following table shows:

• Simulation length: 1Y
• FG2.CWRR configuration
• Output level
  • monthly
  • daily output
• MPI parallelization
  • e.g: 64 Cores Simulation = 1 XIOS core + 63 Orchidee cores
• Forcing resolution vs number of cores

Note: no server is used for 1 MPI case

XIOS

XIOS only writes the history outputs files.

Cell Format: out_orchidee_00XX (in seconds)/orchid_XXXXX.o

	1 MPI	4 MPI	8 MPI	16 MPI	32 MPI	64 MPI	128 MPI
twodeg	Running	1732/32m18	812/17m1	409/10m23	240/7m33	165/6m12	142/6m30
onedeg	Not possible	Mem limit	2734/57m	1334/33m40	710/23m07	436/18m32	398/17m50
halfdeg	Not possible	Mem limit	10175/3h33	4772/2h03	2490/1h25	1404/1h05	1251/1h02

Folder output size :

• 2 deg: 2.6GB
• 1 deg: 10GB
• 0.5 deg: 30 GB

XIOS (restart)

	1 MPI	4 MPI	8 MPI	16 MPI	32 MPI	64 MPI	128 MPI
twodeg	Running	1741/29m	807/13m45	409/7m06	242/4m24	166/3m11	160/3m20
onedeg	Running	5983/1h40	2773/47m03	1333/23m	722/12m42	462/8m13	380/7m05
halfdeg	Not possible	Mem limit	10135/2h50	4760/1h20	2462/42m07	1393/24m02	1174/20m36

IOIPSL

Only IOIPSL enabled.

	1 MPI	4 MPI	8 MPI	16 MPI	32 MPI	64 MPI	128 MPI
twodeg	5656/1h37	1552/29m	819/16m36	441/10m20	267/7m30	177/5m59	135/5m21
onedeg	Running	5841/1h48	3126/1h03	1723/36m44	1027/28m10	678/21m47	516/19m33
halfdeg	Running	Running	Running	7702/2h49	4672/1h58	3036/1h32	2173/1h17

IOIPSL (restart)

	1 MPI	4 MPI	8 MPI	16 MPI	32 MPI	64 MPI	128 MPI
twodeg	5666/1h34	1557/26m04	812/13m39	443/7m31	265/4m40	182/3m15	147/2m38
onedeg	Running	5637/1h34	3135/52m57	1720/28m54	1036/17m30	704/12m	519/8m53
halfdeg	Running	Running	Running	7679/2h08	4627/1h17	3014/50m34	2183/36m45

Table 2: Orchidee XIOS scalability (IO)

In this table the set up FG2.CWRR is used with 63MPI for orchidee_ol and 1MPI for the server XIOS. For the case with IOIPSL, then 64MPI are used for orchidee_ol. The first line describes different levels of output.

	yearly with XIOS	monthly with XIOS	monthly and daily with XIOS	daily and 3hour with XIOS	daily and 3hour with IOIPSL
twodeg
onedeg
halfdeg

FG2.CWRR

Description of the test case... to come