Can you please try:

https://gerrit.fd.io/r/#/c/17950/ <https://gerrit.fd.io/r/#/c/17950/>

I don't have such "special" configuration :)

Thanks,

Damjan

> On 28 Feb 2019, at 06:31, Lijian Zhang <lijian.zh...@arm.com> wrote:
> 
> Hi Maintainers,
> I have two supermicro x86 servers with unusual numa configs. The first server 
> has two physical CPUs, but only one numa node. The other server has two 
> physical CPUs, two numa nodes, but only numa node 0 has attached memories. 
> The detailed CPU info are dumped as below.
>  
> VPP crashed on both server with below call-stack. VPP gets numa nodes ‘0-1’ 
> from ‘/sys/devices/system/node/possible’, and initialize buffers for all of 
> numa nodes, while numa node 1 has no memories, so below function failed with 
> numa node.
>  
> If ‘/sys/devices/system/node/has_memories’ is used to detect the numa nodes, 
> on which VPP initialize buffers, there will be no such crash issue.
>  
> Could you please evaluate this issue, and evaluate if this is a reasonable 
> change requirement, or should we just skip the issue because of the abnormal 
> numa configs in my servers?
>  
> #0  vlib_physmem_shared_map_create (vm=0x7ffff6853240 <vlib_global_main>, 
> name=0x7fffb786621c "buffers-numa-0", size=1073741824, log2_page_sz=30, 
> numa_node=0, map_index=0x7fffb51ffd84) at 
> /home/lijian/tasks/origin/src/vlib/physmem.c:45
> #1  0x00007ffff657b279 in vlib_buffer_main_init_numa_node (vm=0x7ffff6853240 
> <vlib_global_main>, numa_node=0) at 
> /home/lijian/tasks/origin/src/vlib/buffer.c:672
> #2  0x00007ffff657b8f9 in vlib_buffer_main_init (vm=0x7ffff6853240 
> <vlib_global_main>) at /home/lijian/tasks/origin/src/vlib/buffer.c:801
> #3  0x00007ffff65c7bb2 in vlib_main (vm=0x7ffff6853240 <vlib_global_main>, 
> input=0x7fffb51fffb0) at /home/lijian/tasks/origin/src/vlib/main.c:1988
> #4  0x00007ffff662570a in thread0 (arg=140737329312320) at 
> /home/lijian/tasks/origin/src/vlib/unix/main.c:606
> #5  0x00007ffff6079544 in clib_calljmp () from 
> /home/lijian/tasks/origin/build-root/build-vpp_debug-native/vpp/lib/libvppinfra.so.19.04
> #6  0x00007fffffffd2b0 in ?? ()
> #7  0x00007ffff6625bd7 in vlib_unix_main (argc=36, argv=0x55555586f3b0) at 
> /home/lijian/tasks/origin/src/vlib/unix/main.c:675
> #8  0x000055555555bedc in main (argc=36, argv=0x55555586f3b0) at 
> /home/lijian/tasks/origin/src/vpp/vnet/main.c:274
>  
>  
> lijian@net-x86-supermicro-01:~/tasks/origin$ sudo numactl -H
> available: 1 nodes (0)
> node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
> node 0 size: 64383 MB
> node 0 free: 33048 MB
> node distances:
> node   0
>   0:  10
> lijian@net-x86-supermicro-01:~/tasks/origin$ lscpu
> Architecture:          x86_64
> CPU op-mode(s):        32-bit, 64-bit
> Byte Order:            Little Endian
> CPU(s):                20
> On-line CPU(s) list:   0-19
> Thread(s) per core:    1
> Core(s) per socket:    10
> Socket(s):             2
> NUMA node(s):          1
> Vendor ID:             GenuineIntel
> CPU family:            6
> Model:                 63
> Model name:            Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
> Stepping:              2
> CPU MHz:               2300.179
> CPU max MHz:           3000.0000
> CPU min MHz:           1200.0000
> BogoMIPS:              4601.05
> Virtualization:        VT-x
> L1d cache:             32K
> L1i cache:             32K
> L2 cache:              256K
> L3 cache:              25600K
> NUMA node0 CPU(s):     0-19
> Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx 
> pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology 
> nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 
> ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt 
> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb invpcid_single 
> kaiser tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 
> smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm arat pln pts
>  
>  
> lijian@net-x86-supermicro-02:~/tasks/origin$ sudo numactl -H
> available: 2 nodes (0-1)
> node 0 cpus: 0 1 2 3 4 5 6 7 8 9
> node 0 size: 64311 MB
> node 0 free: 30865 MB
> node 1 cpus: 10 11 12 13 14 15 16 17 18 19
> node 1 size: 0 MB
> node 1 free: 0 MB
> node distances:
> node   0   1
>   0:  10  20
>   1:  20  10
> lijian@net-x86-supermicro-02:~/tasks/origin$ lscpu
> Architecture:        x86_64
> CPU op-mode(s):      32-bit, 64-bit
> Byte Order:          Little Endian
> CPU(s):              20
> On-line CPU(s) list: 0-19
> Thread(s) per core:  1
> Core(s) per socket:  10
> Socket(s):           2
> NUMA node(s):        2
> Vendor ID:           GenuineIntel
> CPU family:          6
> Model:               63
> Model name:          Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
> Stepping:            2
> CPU MHz:             1200.176
> CPU max MHz:         2300.0000
> CPU min MHz:         1200.0000
> BogoMIPS:            4599.71
> Virtualization:      VT-x
> L1d cache:           32K
> L1i cache:           32K
> L2 cache:            256K
> L3 cache:            25600K
> NUMA node0 CPU(s):   0-9
> NUMA node1 CPU(s):   10-19
> Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx 
> pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology 
> nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est 
> tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt 
> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb 
> invpcid_single pti intel_ppin ssbd ibrs ibpb stibp tpr_shadow vnmi 
> flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid 
> cqm xsaveopt cqm_llc cqm_occup_llc dtherm arat pln pts flush_l1d
> lijian@net-x86-supermicro-02:~/tasks/origin$
>  
> Thanks.
>  
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