mir/ovs
2
0
Fork 0
mirror of https://github.com/openvswitch/ovs synced 2025-08-31 14:25:26 +00:00
Code Issues Releases Wiki Activity

dpif-netdev: Split function to find lowest loaded PMD thread core.

Browse Source 
This splits up the looping through each PMD thread core on a numa node
with the check to compare cycles or rxqs.

This is done so in future the compare could be reused with any group
of PMD thread cores.

There is no user visible change in behaviour.

Signed-off-by: Kevin Traynor <ktraynor@redhat.com>
Acked-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Kevin Traynor
2022-04-05 15:13:36 +01:00
committed by Ilya Maximets
parent 04e5adfedd
commit 37ccbd9c9d
1 changed files with 25 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
lib/dpif-netdev.c
View File

@@ -5744,28 +5744,43 @@ compare_rxq_cycles(const void *a, const void *b)
}
}
static bool
sched_pmd_new_lowest(struct sched_pmd *current_lowest, struct sched_pmd *pmd,
bool has_proc)
{
uint64_t current_num, pmd_num;
if (current_lowest == NULL) {
return true;
}
if (has_proc) {
current_num = current_lowest->pmd_proc_cycles;
pmd_num = pmd->pmd_proc_cycles;
} else {
current_num = current_lowest->n_rxq;
pmd_num = pmd->n_rxq;
}
if (pmd_num < current_num) {
return true;
}
return false;
}
static struct sched_pmd *
sched_pmd_get_lowest(struct sched_numa *numa, bool has_cyc)
{
struct sched_pmd *lowest_sched_pmd = NULL;
uint64_t lowest_num = UINT64_MAX;
for (unsigned i = 0; i < numa->n_pmds; i++) {
struct sched_pmd *sched_pmd;
uint64_t pmd_num;
sched_pmd = &numa->pmds[i];
if (sched_pmd->isolated) {
continue;
}
if (has_cyc) {
pmd_num = sched_pmd->pmd_proc_cycles;
} else {
pmd_num = sched_pmd->n_rxq;
}
if (pmd_num < lowest_num) {
lowest_num = pmd_num;
if (sched_pmd_new_lowest(lowest_sched_pmd, sched_pmd, has_cyc)) {
lowest_sched_pmd = sched_pmd;
}
}