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plist/xqos fini early out if nothing to be done

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All incoming samples end up in ddsi_plist_fini, usually one with nothing
present, sometimes one containing status info or a keyhash.  The
"present" flags allow this to be a very quick operation in these simple
cases, and this should be made use of.

Signed-off-by: Erik Boasson <eb@ilities.com>
This commit is contained in:
Erik Boasson 2020-06-03 10:16:00 +02:00 • committed by eboasson
parent ca8742bfba
commit 8ae005a05a
1 changed files with 9 additions and 0 deletions
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9
src/core/ddsi/src/ddsi_plist.c
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@ -1741,6 +1741,7 @@ static const struct piddesc_index piddesc_vendor_index[] = {
table too small or too large */
static const struct piddesc *piddesc_unalias[18 + SECURITY_PROC_ARRAY_SIZE];
static const struct piddesc *piddesc_fini[18 + SECURITY_PROC_ARRAY_SIZE];
static uint64_t plist_fini_mask, qos_fini_mask;
static ddsrt_once_t table_init_control = DDSRT_ONCE_INIT;
static size_t pid_to_index (nn_parameterid_t pid)
@ -1836,6 +1837,10 @@ static void ddsi_plist_init_tables_real (void)
{
assert (fini_index < sizeof (piddesc_fini) / sizeof (piddesc_fini[0]));
piddesc_fini[fini_index++] = &table[j];
if (table[j].flags & PDF_QOS)
qos_fini_mask |= table[j].present_flag;
else
plist_fini_mask |= table[j].present_flag;
}
}
}
@ -1876,12 +1881,16 @@ static void plist_or_xqos_fini (void * __restrict dst, size_t shift, uint64_t pm
if (shift > 0)
{
dds_qos_t *qos = dst;
if ((qos->present & qos_fini_mask) == 0)
return;
pfs = (struct flagset) { NULL, NULL, 0 };
qfs = (struct flagset) { .present = &qos->present, .aliased = &qos->aliased };
}
else
{
ddsi_plist_t *plist = dst;
if ((plist->present & plist_fini_mask) == 0 && (plist->qos.present & qos_fini_mask) == 0)
return;
pfs = (struct flagset) { .present = &plist->present, .aliased = &plist->aliased };
qfs = (struct flagset) { .present = &plist->qos.present, .aliased = &plist->qos.aliased };
}