struct test_thash_v4 v4_tbl[] = {
{IPv4(161, 142, 100, 80), IPv4(66, 9, 149, 187),
1766, 2794},
{IPv4(66, 9, 149, 187), IPv4(161, 142, 100, 80),
2794, 1766},
{IPv4(65, 69, 140, 83), IPv4(199, 92, 111, 2),
4739, 14230},
{IPv4(12, 22, 207, 184), IPv4(24, 19, 198, 95),
38024, 12898},
{IPv4(209, 142, 163, 6), IPv4(38, 27, 205, 30),
2217, 48228},
{IPv4(202, 188, 127, 2), IPv4(153, 39, 163, 191),
1303, 44251},
};
uint8_t default_rss_key[] = {
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa,
};
int test_thash(void)
{
uint32_t i, j;
union rte_thash_tuple tuple;
uint32_t rss_l3, rss_l3l4;
uint8_t rss_key_be[RTE_DIM(default_rss_key)];
/* Convert RSS key*/
rte_convert_rss_key((uint32_t *)&default_rss_key,
(uint32_t *)rss_key_be, RTE_DIM(default_rss_key));
for (i = 0; i < RTE_DIM(v4_tbl); i++) {
tuple.v4.src_addr = v4_tbl[i].src_ip;
tuple.v4.dst_addr = v4_tbl[i].dst_ip;
tuple.v4.sport = v4_tbl[i].src_port;
tuple.v4.dport = v4_tbl[i].dst_port;
/*Calculate hash with original key*/
rss_l3 = rte_softrss((uint32_t *)&tuple,
RTE_THASH_V4_L3_LEN, default_rss_key);
printf("rss_l3 = %u\t",rss_l3);
rss_l3l4 = rte_softrss((uint32_t *)&tuple,
RTE_THASH_V4_L4_LEN, default_rss_key);
printf("rss_l3l4 = %u\t",rss_l3l4);
/*Calculate hash with converted key*/
rss_l3 = rte_softrss_be((uint32_t *)&tuple,
RTE_THASH_V4_L3_LEN, rss_key_be);
printf("rss_l3 = %u\t",rss_l3);
rss_l3l4 = rte_softrss_be((uint32_t *)&tuple,
RTE_THASH_V4_L4_LEN, rss_key_be);
printf("rss_l3l4 = %u\n",rss_l3l4);
}
return 0;
}
输出结果为：targ[0]=1834637018
targ[1]=626724546
targ[2]=1097278781
targ[3]=1134792624
targ[4]=3502910411
targ[5]=2927308980
targ[6]=2009804195
targ[7]=2150691340
targ[8]=1782757179
targ[9]=3198943738
rss_l3 = 842960834 rss_l3l4 = 1372373368 rss_l3 = 842960834 rss_l3l4 = 1372373368
rss_l3 = 3125106814 rss_l3l4 = 4259813810 rss_l3 = 3125106814 rss_l3l4 = 4259813810
rss_l3 = 3608684074 rss_l3l4 = 3324424426 rss_l3 = 3608684074 rss_l3l4 = 3324424426
rss_l3 = 3536889310 rss_l3l4 = 1546336586 rss_l3 = 3536889310 rss_l3l4 = 1546336586
rss_l3 = 2191036790 rss_l3l4 = 2949067391 rss_l3 = 2191036790 rss_l3l4 = 2949067391
rss_l3 = 1561856453 rss_l3l4 = 283650210 rss_l3 = 1561856453 rss_l3l4 = 283650210
v4_tbl表中的第一条和第二条是同一条链路的往返，但是程序运行结果rss值分别是：
rss_l3 = 842960834 rss_l3l4 = 1372373368 rss_l3 = 842960834 rss_l3l4 = 1372373368
rss_l3 = 3125106814 rss_l3l4 = 4259813810 rss_l3 = 3125106814 rss_l3l4 = 4259813810
这是为什么呢？？请各位大神赐教！