Some more Info. Basically the CPU does not support AVX512. So, I think I need to disable avx512 instructions when compiling multibuffer library, DPDK and the application itself. I tried using some -mno-avx512x flags but still error persisted. Is the observation valid? I need help in disabling avx512 functions then. would it affect performances nd usage?
On Sat, Dec 7, 2019 at 2:10 AM Suraj R Gupta <surajrgu...@iith.ac.in> wrote: > Hi all, > I am encountering some issues in using intel multi buffer library with dpdk > crypto library. > > > > > *DPDK version used - 18.05.1Intel Multibuffer library version - 0.52 > ( https://github.com/intel/intel-ipsec-mb/tree/v0.52 > <https://github.com/intel/intel-ipsec-mb/tree/v0.52> )CPU - InfoIntel(R) > Core(TM) i7-8700 CPU @ 3.20GHz* > > 1. When I am using aes cmac with intel multi buffer library from DPDK. I am > receiving an segmentation fault in aes_cmac_subkey_gen_avx512(). > This segmentation fault appears at times. > Thread 5 "lcore-slave-1" received signal SIGSEGV, Segmentation fault. > [Switching to Thread 0x7feff43fe700 (LWP 24301)] > 0x00007ffff730ab04 in aes_cmac_subkey_gen_avx512 () from > /usr/lib/libIPSec_MB.so.0 > > 2. On compiling the above intel multi buffer library and running LibTestApp > from multi buffer library. It is showing Illegal Instruction. > AES-CFB128 standard test vectors: > ........................ > ...Pass > SHA standard test vectors (N jobs = 1): > .................... > ...Pass > Testing AVX512 interface > Illegal instruction (core dumped) > > I am not able to understand the issue. Request you to help me in this > regard. > Please revert for any clarification. > -- > Thanks and Regards > Suraj R Gupta > -- Thanks and Regards Suraj R Gupta
