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dpif-netdev: Add function pointer for netdev input.

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This commit adds a function pointer to the pmd thread data structure,
giving the pmd thread flexibility in its dpif-input function choice.
This allows choosing of the implementation based on ISA capabilities
of the runtime CPU, leading to optimizations and higher performance.

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Co-authored-by: Cian Ferriter <cian.ferriter@intel.com>
Signed-off-by: Cian Ferriter <cian.ferriter@intel.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
This commit is contained in:
Harry van Haaren
2021-07-09 15:58:16 +00:00
committed by Ian Stokes
parent 5930dfeeb2
commit e540499e4f
2 changed files with 16 additions and 1 deletions
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10
lib/dpif-netdev-private-thread.h
View File

@@ -47,6 +47,13 @@ struct dp_netdev_pmd_thread_ctx {
uint32_t emc_insert_min;
};
/* Forward declaration for typedef. */
struct dp_netdev_pmd_thread;
typedef void (*dp_netdev_input_func)(struct dp_netdev_pmd_thread *pmd,
struct dp_packet_batch *packets,
odp_port_t port_no);
/* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
* the performance overhead of interrupt processing. Therefore netdev can
* not implement rx-wait for these devices. dpif-netdev needs to poll
@@ -101,6 +108,9 @@ struct dp_netdev_pmd_thread {
/* Current context of the PMD thread. */
struct dp_netdev_pmd_thread_ctx ctx;
/* Function pointer to call for dp_netdev_input() functionality. */
ATOMIC(dp_netdev_input_func) netdev_input_func;
struct seq *reload_seq;
uint64_t last_reload_seq;

7
lib/dpif-netdev.c
View File

@@ -4286,8 +4286,9 @@ dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
}
}
}
/* Process packet batch. */
dp_netdev_input(pmd, &batch, port_no);
pmd->netdev_input_func(pmd, &batch, port_no);
/* Assign processing cycles to rx queue. */
cycles = cycle_timer_stop(&pmd->perf_stats, &timer);
@@ -6088,6 +6089,10 @@ dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
hmap_init(&pmd->tnl_port_cache);
hmap_init(&pmd->send_port_cache);
cmap_init(&pmd->tx_bonds);
/* Initialize the DPIF function pointer to the default scalar version. */
pmd->netdev_input_func = dp_netdev_input;
/* init the 'flow_cache' since there is no
* actual thread created for NON_PMD_CORE_ID. */
if (core_id == NON_PMD_CORE_ID) {