From: Gowrishankar Muthukrishnan Date: Thu, 21 Sep 2017 10:05:24 +0000 (+0530) Subject: examples/l3fwd: optimize packet processing on powerpc X-Git-Tag: spdx-start~1295 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2193b7467f7ae10c205f51c3b494cba776b3b6d1;p=dpdk.git examples/l3fwd: optimize packet processing on powerpc This patch adds altivec support for lpm packet processing in powerpc. Signed-off-by: Gowrishankar Muthukrishnan Acked-by: Chao Zhu --- diff --git a/MAINTAINERS b/MAINTAINERS index f67618c5bb..2a58378b71 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -176,6 +176,7 @@ M: Chao Zhu F: lib/librte_eal/common/arch/ppc_64/ F: lib/librte_eal/common/include/arch/ppc_64/ F: drivers/net/i40e/i40e_rxtx_vec_altivec.c +F: examples/l3fwd/*altivec.h Intel x86 M: Bruce Richardson diff --git a/examples/l3fwd/l3fwd_altivec.h b/examples/l3fwd/l3fwd_altivec.h new file mode 100644 index 0000000000..a1d25eaa78 --- /dev/null +++ b/examples/l3fwd/l3fwd_altivec.h @@ -0,0 +1,284 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2016 Intel Corporation. All rights reserved. + * Copyright(c) 2017 IBM Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +#ifndef _L3FWD_ALTIVEC_H_ +#define _L3FWD_ALTIVEC_H_ + +#include "l3fwd.h" +#include "l3fwd_common.h" + +/* + * Update source and destination MAC addresses in the ethernet header. + * Perform RFC1812 checks and updates for IPV4 packets. + */ +static inline void +processx4_step3(struct rte_mbuf *pkt[FWDSTEP], uint16_t dst_port[FWDSTEP]) +{ + vector unsigned int te[FWDSTEP]; + vector unsigned int ve[FWDSTEP]; + vector unsigned int *p[FWDSTEP]; + + p[0] = rte_pktmbuf_mtod(pkt[0], vector unsigned int *); + p[1] = rte_pktmbuf_mtod(pkt[1], vector unsigned int *); + p[2] = rte_pktmbuf_mtod(pkt[2], vector unsigned int *); + p[3] = rte_pktmbuf_mtod(pkt[3], vector unsigned int *); + + ve[0] = (vector unsigned int)val_eth[dst_port[0]]; + te[0] = *p[0]; + + ve[1] = (vector unsigned int)val_eth[dst_port[1]]; + te[1] = *p[1]; + + ve[2] = (vector unsigned int)val_eth[dst_port[2]]; + te[2] = *p[2]; + + ve[3] = (vector unsigned int)val_eth[dst_port[3]]; + te[3] = *p[3]; + + /* Update first 12 bytes, keep rest bytes intact. */ + te[0] = (vector unsigned int)vec_sel( + (vector unsigned short)ve[0], + (vector unsigned short)te[0], + (vector unsigned short) {0, 0, 0, 0, + 0, 0, 0xffff, 0xffff}); + + te[1] = (vector unsigned int)vec_sel( + (vector unsigned short)ve[1], + (vector unsigned short)te[1], + (vector unsigned short) {0, 0, 0, 0, + 0, 0, 0xffff, 0xffff}); + + te[2] = (vector unsigned int)vec_sel( + (vector unsigned short)ve[2], + (vector unsigned short)te[2], + (vector unsigned short) {0, 0, 0, 0, 0, + 0, 0xffff, 0xffff}); + + te[3] = (vector unsigned int)vec_sel( + (vector unsigned short)ve[3], + (vector unsigned short)te[3], + (vector unsigned short) {0, 0, 0, 0, + 0, 0, 0xffff, 0xffff}); + + *p[0] = te[0]; + *p[1] = te[1]; + *p[2] = te[2]; + *p[3] = te[3]; + + rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[0] + 1), + &dst_port[0], pkt[0]->packet_type); + rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[1] + 1), + &dst_port[1], pkt[1]->packet_type); + rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[2] + 1), + &dst_port[2], pkt[2]->packet_type); + rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[3] + 1), + &dst_port[3], pkt[3]->packet_type); +} + +/* + * Group consecutive packets with the same destination port in bursts of 4. + * Suppose we have array of destination ports: + * dst_port[] = {a, b, c, d,, e, ... } + * dp1 should contain: , dp2: . + * We doing 4 comparisons at once and the result is 4 bit mask. + * This mask is used as an index into prebuild array of pnum values. + */ +static inline uint16_t * +port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, vector unsigned short dp1, + vector unsigned short dp2) +{ + union { + uint16_t u16[FWDSTEP + 1]; + uint64_t u64; + } *pnum = (void *)pn; + + int32_t v; + + v = vec_any_eq(dp1, dp2); + + + /* update last port counter. */ + lp[0] += gptbl[v].lpv; + + /* if dest port value has changed. */ + if (v != GRPMSK) { + pnum->u64 = gptbl[v].pnum; + pnum->u16[FWDSTEP] = 1; + lp = pnum->u16 + gptbl[v].idx; + } + + return lp; +} + +/** + * Process one packet: + * Update source and destination MAC addresses in the ethernet header. + * Perform RFC1812 checks and updates for IPV4 packets. + */ +static inline void +process_packet(struct rte_mbuf *pkt, uint16_t *dst_port) +{ + struct ether_hdr *eth_hdr; + vector unsigned int te, ve; + + eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *); + + te = *(vector unsigned int *)eth_hdr; + ve = (vector unsigned int)val_eth[dst_port[0]]; + + rfc1812_process((struct ipv4_hdr *)(eth_hdr + 1), dst_port, + pkt->packet_type); + + /* dynamically vec_sel te and ve for MASK_ETH (0x3f) */ + te = (vector unsigned int)vec_sel( + (vector unsigned short)ve, + (vector unsigned short)te, + (vector unsigned short){0, 0, 0, 0, + 0, 0, 0xffff, 0xffff}); + + *(vector unsigned int *)eth_hdr = te; +} + +/** + * Send packets burst from pkts_burst to the ports in dst_port array + */ +static __rte_always_inline void +send_packets_multi(struct lcore_conf *qconf, struct rte_mbuf **pkts_burst, + uint16_t dst_port[MAX_PKT_BURST], int nb_rx) +{ + int32_t k; + int j = 0; + uint16_t dlp; + uint16_t *lp; + uint16_t pnum[MAX_PKT_BURST + 1]; + + /* + * Finish packet processing and group consecutive + * packets with the same destination port. + */ + k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP); + if (k != 0) { + vector unsigned short dp1, dp2; + + lp = pnum; + lp[0] = 1; + + processx4_step3(pkts_burst, dst_port); + + /* dp1: */ + dp1 = *(vector unsigned short *)dst_port; + + for (j = FWDSTEP; j != k; j += FWDSTEP) { + processx4_step3(&pkts_burst[j], &dst_port[j]); + + /* + * dp2: + * + */ + dp2 = *((vector unsigned short *) + &dst_port[j - FWDSTEP + 1]); + lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2); + + /* + * dp1: + * + */ + dp1 = vec_sro(dp2, (vector unsigned char) { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, (FWDSTEP - 1) * sizeof(dst_port[0])}); + } + + /* + * dp2: + */ + dp2 = vec_perm(dp1, (vector unsigned short){}, + (vector unsigned char){0xf9}); + lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2); + + /* + * remove values added by the last repeated + * dst port. + */ + lp[0]--; + dlp = dst_port[j - 1]; + } else { + /* set dlp and lp to the never used values. */ + dlp = BAD_PORT - 1; + lp = pnum + MAX_PKT_BURST; + } + + /* Process up to last 3 packets one by one. */ + switch (nb_rx % FWDSTEP) { + case 3: + process_packet(pkts_burst[j], dst_port + j); + GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j); + j++; + /* fall-through */ + case 2: + process_packet(pkts_burst[j], dst_port + j); + GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j); + j++; + /* fall-through */ + case 1: + process_packet(pkts_burst[j], dst_port + j); + GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j); + j++; + } + + /* + * Send packets out, through destination port. + * Consecutive packets with the same destination port + * are already grouped together. + * If destination port for the packet equals BAD_PORT, + * then free the packet without sending it out. + */ + for (j = 0; j < nb_rx; j += k) { + + int32_t m; + uint16_t pn; + + pn = dst_port[j]; + k = pnum[j]; + + if (likely(pn != BAD_PORT)) + send_packetsx4(qconf, pn, pkts_burst + j, k); + else + for (m = j; m != j + k; m++) + rte_pktmbuf_free(pkts_burst[m]); + + } +} + +#endif /* _L3FWD_ALTIVEC_H_ */ diff --git a/examples/l3fwd/l3fwd_lpm.c b/examples/l3fwd/l3fwd_lpm.c index a809e0649e..2d0e172484 100644 --- a/examples/l3fwd/l3fwd_lpm.c +++ b/examples/l3fwd/l3fwd_lpm.c @@ -191,6 +191,8 @@ lpm_get_dst_port_with_ipv4(const struct lcore_conf *qconf, struct rte_mbuf *pkt, #include "l3fwd_lpm_sse.h" #elif defined RTE_MACHINE_CPUFLAG_NEON #include "l3fwd_lpm_neon.h" +#elif defined(RTE_ARCH_PPC_64) +#include "l3fwd_lpm_altivec.h" #else #include "l3fwd_lpm.h" #endif @@ -264,7 +266,8 @@ lpm_main_loop(__attribute__((unused)) void *dummy) if (nb_rx == 0) continue; -#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON +#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON \ + || defined RTE_ARCH_PPC_64 l3fwd_lpm_send_packets(nb_rx, pkts_burst, portid, qconf); #else diff --git a/examples/l3fwd/l3fwd_lpm_altivec.h b/examples/l3fwd/l3fwd_lpm_altivec.h new file mode 100644 index 0000000000..36ca983f99 --- /dev/null +++ b/examples/l3fwd/l3fwd_lpm_altivec.h @@ -0,0 +1,164 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2016 Intel Corporation. All rights reserved. + * Copyright(c) 2017 IBM Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __L3FWD_LPM_ALTIVEC_H__ +#define __L3FWD_LPM_ALTIVEC_H__ + +#include "l3fwd_altivec.h" + +/* + * Read packet_type and destination IPV4 addresses from 4 mbufs. + */ +static inline void +processx4_step1(struct rte_mbuf *pkt[FWDSTEP], + vector unsigned int *dip, + uint32_t *ipv4_flag) +{ + struct ipv4_hdr *ipv4_hdr; + struct ether_hdr *eth_hdr; + uint32_t x0, x1, x2, x3; + + eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *); + ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1); + x0 = ipv4_hdr->dst_addr; + ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4; + + rte_compiler_barrier(); + eth_hdr = rte_pktmbuf_mtod(pkt[1], struct ether_hdr *); + ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1); + x1 = ipv4_hdr->dst_addr; + ipv4_flag[0] &= pkt[1]->packet_type; + + rte_compiler_barrier(); + eth_hdr = rte_pktmbuf_mtod(pkt[2], struct ether_hdr *); + ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1); + x2 = ipv4_hdr->dst_addr; + ipv4_flag[0] &= pkt[2]->packet_type; + + rte_compiler_barrier(); + eth_hdr = rte_pktmbuf_mtod(pkt[3], struct ether_hdr *); + ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1); + x3 = ipv4_hdr->dst_addr; + ipv4_flag[0] &= pkt[3]->packet_type; + + rte_compiler_barrier(); + dip[0] = (vector unsigned int){x0, x1, x2, x3}; +} + +/* + * Lookup into LPM for destination port. + * If lookup fails, use incoming port (portid) as destination port. + */ +static inline void +processx4_step2(const struct lcore_conf *qconf, + vector unsigned int dip, + uint32_t ipv4_flag, + uint8_t portid, + struct rte_mbuf *pkt[FWDSTEP], + uint16_t dprt[FWDSTEP]) +{ + rte_xmm_t dst; + const vector unsigned char bswap_mask = (vector unsigned char){ + 3, 2, 1, 0, + 7, 6, 5, 4, + 11, 10, 9, 8, + 15, 14, 13, 12}; + + /* Byte swap 4 IPV4 addresses. */ + dip = (vector unsigned int)vec_perm(*(vector unsigned char *)&dip, + (vector unsigned char){}, bswap_mask); + + /* if all 4 packets are IPV4. */ + if (likely(ipv4_flag)) { + rte_lpm_lookupx4(qconf->ipv4_lookup_struct, (xmm_t)dip, + (uint32_t *)&dst, portid); + /* get rid of unused upper 16 bit for each dport. */ + dst.x = (xmm_t)vec_packs(dst.x, dst.x); + *(uint64_t *)dprt = dst.u64[0]; + } else { + dst.x = (xmm_t)dip; + dprt[0] = lpm_get_dst_port_with_ipv4(qconf, pkt[0], + dst.u32[0], portid); + dprt[1] = lpm_get_dst_port_with_ipv4(qconf, pkt[1], + dst.u32[1], portid); + dprt[2] = lpm_get_dst_port_with_ipv4(qconf, pkt[2], + dst.u32[2], portid); + dprt[3] = lpm_get_dst_port_with_ipv4(qconf, pkt[3], + dst.u32[3], portid); + } +} + +/* + * Buffer optimized handling of packets, invoked + * from main_loop. + */ +static inline void +l3fwd_lpm_send_packets(int nb_rx, struct rte_mbuf **pkts_burst, + uint8_t portid, struct lcore_conf *qconf) +{ + int32_t j; + uint16_t dst_port[MAX_PKT_BURST]; + vector unsigned int dip[MAX_PKT_BURST / FWDSTEP]; + uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP]; + const int32_t k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP); + + for (j = 0; j != k; j += FWDSTEP) + processx4_step1(&pkts_burst[j], &dip[j / FWDSTEP], + &ipv4_flag[j / FWDSTEP]); + + for (j = 0; j != k; j += FWDSTEP) + processx4_step2(qconf, dip[j / FWDSTEP], + ipv4_flag[j / FWDSTEP], + portid, &pkts_burst[j], &dst_port[j]); + + /* Classify last up to 3 packets one by one */ + switch (nb_rx % FWDSTEP) { + case 3: + dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); + j++; + /* fall-through */ + case 2: + dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); + j++; + /* fall-through */ + case 1: + dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); + j++; + /* fall-through */ + } + + send_packets_multi(qconf, pkts_burst, dst_port, nb_rx); +} + +#endif /* __L3FWD_LPM_ALTIVEC_H__ */