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Date: Thu, 4 Mar 2021 17:57:19 +0100
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Subject: [dpdk-users] Segmentation fault with -msse3
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Hello dpdk users, 

 

I'm a newbie to dpdk and I try to get the list of the rss hash functions for
a given port with the following code : 

 

static uint64_t get_rss_function(int port_id){

                int ret;

                struct rte_eth_rss_conf rss_conf;

 

                ret = rte_eth_dev_rss_hash_conf_get(port_id,&rss_conf);

                if(ret < 0){

                               printf("No supported rss\n");

                               return 0;

                }

                return rss_conf.rss_hf;

}

 

I use dpdk version 20.11 and my code is compiled with the following flags (I
'm following the tips of the doc) : 

CXXFLAGS += -mssse3 -mfma -mcx16 -msse4.1 -msse4.2 -mpopcnt -mavx -mavx2
-DALLOW_EXPERIMENTAL_API

 

I have a segmentation fault calling ret =
rte_eth_dev_rss_hash_conf_get(port_id,&rss_conf) ; and the coredump tell an
issue with __memcpy_ssse3().

 

If I remove the -mssse3 I don't have the crash.

 

Can you help me to identify the reason of the segmentation fault and tell me
if I can easily remove the < -mssse3 > flag ?

 

(Sorry for my english)

Regards 

Nicolas