upcall: Configure datapath max-revalidator through ovs-vsctl.

This patch adds a new configuration option, "max-revalidator" to the Open_vSwitch "other-config" column. This sets maximum allowed ravalidator timeout. Actual timeout value is determined at runtime as minimum of "max-idle" and "max-revalidator". Signed-off-by: Vlad Buslov <[email protected]> Acked-by: Roi Dayan <[email protected]> Signed-off-by: Ben Pfaff <[email protected]>
yqnt418 · Aug 21, 2019 · b6bdc3c · b6bdc3c
1 parent c194367
commit b6bdc3c
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Showing 6 changed files with 35 additions and 1 deletion.
diff --git a/ofproto/ofproto-dpif-upcall.c b/ofproto/ofproto-dpif-upcall.c
@@ -978,7 +978,8 @@ udpif_revalidator(void *arg)
                           duration);
             }
 
-            poll_timer_wait_until(start_time + MIN(ofproto_max_idle, 500));
+            poll_timer_wait_until(start_time + MIN(ofproto_max_idle,
+                                                   ofproto_max_revalidator));
             seq_wait(udpif->reval_seq, last_reval_seq);
             latch_wait(&udpif->exit_latch);
             latch_wait(&udpif->pause_latch);

diff --git a/ofproto/ofproto-provider.h b/ofproto/ofproto-provider.h
@@ -524,6 +524,10 @@ extern unsigned ofproto_flow_limit;
  * on system load and other factors. This variable is subject to change. */
 extern unsigned ofproto_max_idle;
 
+/* Maximum timeout (in ms) for revalidator timer.
+ * Revalidator timeout is a minimum of max_idle and max_revalidator values. */
+extern unsigned ofproto_max_revalidator;
+
 /* Number of upcall handler and revalidator threads. Only affects the
  * ofproto-dpif implementation. */
 extern size_t n_handlers, n_revalidators;

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
@@ -306,6 +306,7 @@ struct ovs_mutex ofproto_mutex = OVS_MUTEX_INITIALIZER;
 
 unsigned ofproto_flow_limit = OFPROTO_FLOW_LIMIT_DEFAULT;
 unsigned ofproto_max_idle = OFPROTO_MAX_IDLE_DEFAULT;
+unsigned ofproto_max_revalidator = OFPROTO_MAX_REVALIDATOR_DEFAULT;
 
 size_t n_handlers, n_revalidators;
 
@@ -702,6 +703,15 @@ ofproto_set_max_idle(unsigned max_idle)
     ofproto_max_idle = max_idle;
 }
 
+/* Sets the maximum allowed revalidator timeout. */
+void
+ofproto_set_max_revalidator(unsigned max_revalidator)
+{
+    if (max_revalidator >= 100) {
+        ofproto_max_revalidator = max_revalidator;
+    }
+}
+
 /* If forward_bpdu is true, the NORMAL action will forward frames with
  * reserved (e.g. STP) destination Ethernet addresses. if forward_bpdu is false,
  * the NORMAL action will drop these frames. */

diff --git a/ofproto/ofproto.h b/ofproto/ofproto.h
@@ -308,6 +308,7 @@ int ofproto_port_dump_done(struct ofproto_port_dump *);
 
 #define OFPROTO_FLOW_LIMIT_DEFAULT 200000
 #define OFPROTO_MAX_IDLE_DEFAULT 10000 /* ms */
+#define OFPROTO_MAX_REVALIDATOR_DEFAULT 500 /* ms */
 
 const char *ofproto_port_open_type(const struct ofproto *,
                                    const char *port_type);
@@ -335,6 +336,7 @@ void ofproto_set_in_band_queue(struct ofproto *, int queue_id);
 void ofproto_set_bundle_idle_timeout(unsigned timeout);
 void ofproto_set_flow_limit(unsigned limit);
 void ofproto_set_max_idle(unsigned max_idle);
+void ofproto_set_max_revalidator(unsigned max_revalidator);
 void ofproto_set_forward_bpdu(struct ofproto *, bool forward_bpdu);
 void ofproto_set_mac_table_config(struct ofproto *, unsigned idle_time,
                                   size_t max_entries);

diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
@@ -601,6 +601,9 @@ bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg)
                                         OFPROTO_FLOW_LIMIT_DEFAULT));
     ofproto_set_max_idle(smap_get_int(&ovs_cfg->other_config, "max-idle",
                                       OFPROTO_MAX_IDLE_DEFAULT));
+    ofproto_set_max_revalidator(smap_get_int(&ovs_cfg->other_config,
+                                             "max-revalidator",
+                                             OFPROTO_MAX_REVALIDATOR_DEFAULT));
     ofproto_set_vlan_limit(smap_get_int(&ovs_cfg->other_config, "vlan-limit",
                                        LEGACY_MAX_VLAN_HEADERS));
     ofproto_set_bundle_idle_timeout(smap_get_int(&ovs_cfg->other_config,

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
@@ -190,6 +190,20 @@
         </p>
     </column>
 
+      <column name="other_config" key="max-revalidator"
+              type='{"type": "integer", "minInteger": 100}'>
+        <p>
+          The maximum time (in ms) that revalidator threads will wait before
+          executing flow revalidation. Note that this is maximum allowed value.
+          Actual timeout used by OVS is minimum of max-idle and max-revalidator
+          values. Tweaking this value is discouraged unless you know exactly
+          what you're doing.
+        </p>
+        <p>
+          The default is 500.
+        </p>
+      </column>
+
       <column name="other_config" key="hw-offload"
               type='{"type": "boolean"}'>
         <p>