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dpif-netdev: Do not create handler threads.

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Avoid unnecessary thread creation as no upcalls are generated,
resulting in idle threads waiting for process termination.

This optimization significantly reduces memory usage, cutting it
by half on a 128 CPU/thread system during testing, with the number
of threads reduced from 95 to 0.

Acked-by: Mike Pattrick <mkp@redhat.com>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
This commit is contained in:
Eelco Chaudron
2024-02-20 10:31:34 +01:00
parent 166ee41d28
commit f0d1beca6c
2 changed files with 25 additions and 10 deletions
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10
lib/dpif-netdev.c
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@@ -5250,6 +5250,14 @@ dpif_netdev_set_config(struct dpif *dpif, const struct smap *other_config)
return 0;
}
static bool
dpif_netdev_number_handlers_required(struct dpif *dpif_ OVS_UNUSED,
uint32_t *n_handlers)
{
*n_handlers = 0;
return true;
}
/* Parses affinity list and returns result in 'core_ids'. */
static int
parse_affinity_list(const char *affinity_list, unsigned *core_ids, int n_rxq)
@@ -9989,7 +9997,7 @@ const struct dpif_class dpif_netdev_class = {
dpif_netdev_offload_stats_get,
NULL, /* recv_set */
NULL, /* handlers_set */
NULL, /* number_handlers_required */
dpif_netdev_number_handlers_required,
dpif_netdev_set_config,
dpif_netdev_queue_to_priority,
NULL, /* recv */