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dpif-netdev: Read recirc depth and flow api enabled once per batch.

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The call to recirc_depth_get involves accessing a TLS value. So read
that once, and store it on the stack for re-use while processing the
batch. The same goes for reading netdev_is_flow_api_enabled(), a
non-inlined function.

Signed-off-by: Balazs Nemeth <bnemeth@redhat.com>
Acked-by: Gaetan Rivet <grive@u256.net>
Acked-by: Paolo Valerio <pvalerio@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Balazs Nemeth 2021-06-28 17:19:14 +02:00 committed by Ilya Maximets
parent e6ad4d8d9c
commit aa4359cb9f
1 changed files with 3 additions and 1 deletions
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4
lib/dpif-netdev.c
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@ -7151,6 +7151,8 @@ dfc_processing(struct dp_netdev_pmd_thread *pmd,
struct dp_packet *packet;
const size_t cnt = dp_packet_batch_size(packets_);
uint32_t cur_min = pmd->ctx.emc_insert_min;
const uint32_t recirc_depth = *recirc_depth_get();
const bool netdev_flow_api = netdev_is_flow_api_enabled();
int i;
uint16_t tcp_flags;
bool smc_enable_db;
@ -7182,7 +7184,7 @@ dfc_processing(struct dp_netdev_pmd_thread *pmd,
pkt_metadata_init(&packet->md, port_no);
}
if (netdev_is_flow_api_enabled() && *recirc_depth_get() == 0) {
if (netdev_flow_api && recirc_depth == 0) {
if (OVS_UNLIKELY(dp_netdev_hw_flow(pmd, port_no, packet, &flow))) {
/* Packet restoration failed and it was dropped, do not
* continue processing.