Difference between revisions of "BGQ"
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BGQ job size is typically determined by midplanes (512 nodes or 8192 cores), however sub-blocks can be used to further subdivide midplanes with a minimum of | BGQ job size is typically determined by midplanes (512 nodes or 8192 cores), however sub-blocks can be used to further subdivide midplanes with a minimum of | ||
one IO node per block. In SciNet's configuration (with 8 I/O nodes per midplane) this allows 64 nodes (1024 cores) to be the smallest job size. | one IO node per block. In SciNet's configuration (with 8 I/O nodes per midplane) this allows 64 nodes (1024 cores) to be the smallest job size. | ||
| + | |||
| + | |||
| + | ==== Compile ==== | ||
| + | |||
| + | <pre> | ||
| + | /bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpich2version | ||
| + | /bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpixlc | ||
| + | /bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpixf90 | ||
| + | </pre> | ||
| + | |||
| + | ==== Run a Job ===== | ||
| + | |||
| + | <pre> | ||
| + | runjob --block R00-M0-N03-32 --ranks-per-node=16 --cwd=/gpfs/DDNgpfs3/xsnorthrup/osu_bgq --exe=/gpfs/DDNgpfs3/xsnorthrup/osu_bgq/osu_mbw_mr | ||
| + | </pre> | ||
| + | |||
| + | |||
| + | ==== Setup blocks ==== | ||
| + | |||
| + | <pre> | ||
| + | bg_console | ||
| + | |||
| + | gen_small_block R00-M0-N03-32 R00-M0 32 N03 | ||
| + | |||
| + | allocate R00-M0-N03-32 | ||
| + | |||
| + | select_block R00-M0-N03 | ||
| + | free_block | ||
| + | </pre> | ||
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GPFS | GPFS | ||
| + | |||
| + | |||
Revision as of 15:21, 21 August 2012
| Blue Gene/Q (BGQ) | |
|---|---|
| Installed | August 2012 |
| Operating System | RH6.3, CNK (Linux) |
| Number of Nodes | 2048(32,768 cores), 512 (8,192 cores) |
| Interconnect | 5D Torus (jobs), QDR Infiniband (I/O) |
| Ram/Node | 16 Gb |
| Cores/Node | 16 (64 threads) |
| Login/Devel Node | bgq01,bgq02 |
| Vendor Compilers | bgxlc, bgxlf |
| Queue Submission | Loadleveler |
Specifications
BGQ is an extremely powerful and energy efficient 3rd generation IBM Supercomputer built around a system on a chip compute node that has a 16core 1.6GHz Power based CPU and 16Gb of Ram and runs a very lightweight Linux OS called CNK. The nodes are bundled in groups of 32 and then 16 of these groups make up a midplane with 2 midplanes per rack. The compute nodes are all connected togther using a custom 5D interconnect. Each midplane has 8 Power7 I/O nodes that run a full Redhat Linux OS that manages the compute nodes and mounts the GPFS filesystem.
Jobs
BGQ job size is typically determined by midplanes (512 nodes or 8192 cores), however sub-blocks can be used to further subdivide midplanes with a minimum of one IO node per block. In SciNet's configuration (with 8 I/O nodes per midplane) this allows 64 nodes (1024 cores) to be the smallest job size.
Compile
/bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpich2version /bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpixlc /bgsys/drivers/V1R1M1/ppc64/comm/xl/bin/mpixf90
Run a Job =
runjob --block R00-M0-N03-32 --ranks-per-node=16 --cwd=/gpfs/DDNgpfs3/xsnorthrup/osu_bgq --exe=/gpfs/DDNgpfs3/xsnorthrup/osu_bgq/osu_mbw_mr
Setup blocks
bg_console gen_small_block R00-M0-N03-32 R00-M0 32 N03 allocate R00-M0-N03-32 select_block R00-M0-N03 free_block
I/O
GPFS