CPU Nodes

The IBEX cluster contains different architectures of CPUs like Skylakes, Haswell, Ivy Bridge, Sandy Bridge, Westmere and AbuDhabi .

These different CPUs are accessed (for your source code compilation and job submission) using the following login nodes:

  1. All Intel CPU nodes : ilogin.ibex.kaust.edu.sa
  2. Intel Skylake CPU nodes only: slogin.ibex.kaust.edu.sa
  3. AMD nodes: alogin.ibex.kaust.edu.sa

The IBEX cluster CPU compute nodes are summarized in Table 1. These various CPUs are accessed by the SLURM scheduling using the constraint "#SBATCH --constraint={intel or amd}" or by directly specifying the CPU type as shown below .

For example, “--constraint=cpu_intel_gold_6148” is for Skylake CPUs.

 

 Table 1. Ibex CPU Resources

CPU Family

CPU

Nodes

CORES

CLOCK

FLOPS

GFLOPS

Tflops

Skylake

cpu_intel_gold_6148

108

40

2.60

32

352768

408.47

cpu_intel_gold_6142 (gpu)

16

32

2.60

32

42600

cpu_intel_xeon_gold_6134m (lm)

4

32

3.20

32

13107

 

 

 

 

 

 

 

157.18

Haswell

cpu_intel_e5_2699_v3 (gpu)

16

36

2.30

16

21197

 

 

 

 

 

 

 

Ivy Bridge

cpu_intel_e5_2680_v2

144

20

2.80

8

64512

cpu_intel_e5_2670_v2

32

20

2.50

8

13200

 

 

 

 

 

 

 

Sandy Bridge

cpu_intel_e5_2670

100

16

2.60

8

33946

 

 

 

 

 

 

 

Westmere

cpu_intel_e7_2830 (lm)

2

64

2.13

4

1091

cpu_intel_e7_2860 (lm)

2

80

2.26

4

1446

 

 

 

 

 

 

 

Abu Dhabi

cpu_amd_6376

24

64

2.30

4

14131

cpu_amd_6376 (lm)

13

64

2.30

4

7654

                                                                                                                                         Total (theoretical)

565.65

When submitting a job, user is able to select the desired resources by precising contraints. For example,

sbatch --constraint=intel my_job.sh

runs the job on Intel nodes only.

sbatch --constaint=amd my_job.sh

runs the job on AMD nodes only.

sbatch --constraint=[intel]&[local_1T] my_job.sh

runs the jobs only on Intel node, having at least a local disk of 1 TB along.