examples/service_cores: fix lcore count check

[ upstream commit 328720c ]

The example has various profiles to run services on specified
number of lcores. Due to incorrect boundary condition, service
can be dispatched to a core that does not exist. This puts main
core into endless wait.

Max available number of service cores is all detected lcores
excluding main core.

Fixes: 7f6ee6a ("examples/service_cores: check cores before run")

Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

examples/service_cores/main.c

@@ -118,7 +118,7 @@ apply_profile(int profile_id)
 	struct profile *p = &profiles[profile_id];
 	const uint8_t core_off = 1;
 
-	if (p->num_cores > rte_lcore_count() + 1) {
+	if (p->num_cores > rte_lcore_count() - 1) {
 		printf("insufficent cores to run (%s)",
 			p->name);
 		return;