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From: Ciara Power <ciara.power@intel.com>
To: dev@dpdk.org
Cc: bruce.richardson@intel.com, Ciara Power <ciara.power@intel.com>,
Beilei Xing <beilei.xing@intel.com>, Jeff Guo <jia.guo@intel.com>
Date: Fri, 7 Aug 2020 16:58:50 +0100
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Subject: [dpdk-dev] [PATCH 20.11 03/12] net/i40e: add checks for max SIMD
bitwidth
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When choosing a vector path to take, an extra condition must be
satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
path.
Cc: Beilei Xing <beilei.xing@intel.com>
Cc: Jeff Guo <jia.guo@intel.com>
Signed-off-by: Ciara Power <ciara.power@intel.com>
---
drivers/net/i40e/i40e_rxtx.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index fe7f9200c1..90f4e26fb8 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -3098,7 +3098,8 @@ static eth_rx_burst_t
i40e_get_latest_rx_vec(bool scatter)
{
#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
- if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
+ if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) &&
+ rte_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD)
return scatter ? i40e_recv_scattered_pkts_vec_avx2 :
i40e_recv_pkts_vec_avx2;
#endif
@@ -3115,7 +3116,8 @@ i40e_get_recommend_rx_vec(bool scatter)
* use of AVX2 version to later plaforms, not all those that could
* theoretically run it.
*/
- if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F))
+ if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) &&
+ rte_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD)
return scatter ? i40e_recv_scattered_pkts_vec_avx2 :
i40e_recv_pkts_vec_avx2;
#endif
@@ -3154,7 +3156,8 @@ i40e_set_rx_function(struct rte_eth_dev *dev)
}
}
- if (ad->rx_vec_allowed) {
+ if (ad->rx_vec_allowed && rte_get_max_simd_bitwidth()
+ >= RTE_MAX_128_SIMD) {
/* Vec Rx path */
PMD_INIT_LOG(DEBUG, "Vector Rx path will be used on port=%d.",
dev->data->port_id);
@@ -3268,7 +3271,8 @@ static eth_tx_burst_t
i40e_get_latest_tx_vec(void)
{
#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
- if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
+ if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) &&
+ rte_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD)
return i40e_xmit_pkts_vec_avx2;
#endif
return i40e_xmit_pkts_vec;
@@ -3283,7 +3287,8 @@ i40e_get_recommend_tx_vec(void)
* use of AVX2 version to later plaforms, not all those that could
* theoretically run it.
*/
- if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F))
+ if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) &&
+ rte_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD)
return i40e_xmit_pkts_vec_avx2;
#endif
return i40e_xmit_pkts_vec;
@@ -3311,7 +3316,9 @@ i40e_set_tx_function(struct rte_eth_dev *dev)
}
if (ad->tx_simple_allowed) {
- if (ad->tx_vec_allowed) {
+ if (ad->tx_vec_allowed &&
+ rte_get_max_simd_bitwidth()
+ >= RTE_MAX_128_SIMD) {
PMD_INIT_LOG(DEBUG, "Vector tx finally be used.");
if (ad->use_latest_vec)
dev->tx_pkt_burst =
--
2.17.1