[dpdk-dev] [PATCH 6/6] service cores: enable event/sw with service

Harry van Haaren harry.van.haaren at intel.com
Fri Jun 23 11:06:19 CEST 2017


This commit shows how easy it is to enable a specific
DPDK component with a service callback, in order to get
CPU cycles for it.

The beauty of this method is that the service is unaware
of how much CPU time it is getting - the application can
decide how to split and slice cores and map them to the
registered services.

Signed-off-by: Harry van Haaren <harry.van.haaren at intel.com>
---
 drivers/event/sw/sw_evdev.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
index a31aaa6..f55cad9 100644
--- a/drivers/event/sw/sw_evdev.c
+++ b/drivers/event/sw/sw_evdev.c
@@ -38,6 +38,9 @@
 #include <rte_ring.h>
 #include <rte_errno.h>
 
+#include <rte_service_private.h>
+#include <rte_cycles.h>
+
 #include "sw_evdev.h"
 #include "iq_ring.h"
 #include "event_ring.h"
@@ -695,6 +698,14 @@ set_credit_quanta(const char *key __rte_unused, const char *value, void *opaque)
 	return 0;
 }
 
+
+static int32_t sw_sched_service_func(void *args)
+{
+	struct rte_eventdev *dev = args;
+	sw_event_schedule(dev);
+	return 0;
+}
+
 static int
 sw_probe(struct rte_vdev_device *vdev)
 {
@@ -806,6 +817,17 @@ sw_probe(struct rte_vdev_device *vdev)
 	sw->credit_update_quanta = credit_quanta;
 	sw->sched_quanta = sched_quanta;
 
+	/* register service with EAL */
+	struct rte_service_spec service;
+	memset(&service, 0, sizeof(struct rte_service_spec));
+	snprintf(service.name, sizeof(service.name), "%s_service", name);
+	service.socket_id = socket_id;
+	service.callback = sw_sched_service_func;
+	service.callback_userdata = (void *)dev;
+
+	int32_t ret = rte_service_register(&service);
+	printf("serivce register = %d, cb ud %p\n", ret, dev);
+
 	return 0;
 }
 
-- 
2.7.4



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