That was a fast revision!  Thank you.

Even the new version fails for me, with the same difference: 10 packets
instead of 12.  Do you have any ideas?  The only unusual thing about my
system is that I use 32-bit x86 instead of 64-bit x86-64.

I'm appending a further incremental diff I suggest folding in, because I
noticed a few more style nits.

Thanks,

Ben.

On Fri, Jun 10, 2016 at 02:10:00AM +0000, Daniel Ye wrote:
> Hi Ben,
> 
> Thanks for your review. For the test case, I didn’t get an error in my test 
> machine. I suspected that IPFIX packets are
> not all sent before dump IPFIX stats, so 'sleep 1' is added to make sure all 
> the IPFIX packets are sent.
> 
> Bests,
> Daniel Benli Ye
> 
> > On Jun 10, 2016, at 5:33 AM, Ben Pfaff <b...@ovn.org> wrote:
> > 
> > On Wed, Jun 08, 2016 at 06:45:25PM +0800, Benli Ye wrote:
> >> It is meaningful for user to check the stats of IPFIX.
> >> Using IPFIX stats, user can know how much flows the system
> >> can support. It is also can be used for performance check
> >> of IPFIX.
> > 
> > Thanks for posting v3!
> > 
> > I think that this is close.  I suggest folding in the appended
> > incremental change.
> > 
> > I get test failures with this applied.  I'm attaching them.  Can you
> > take a look?
> > 
> > Thanks,
> > 
> > Ben.

diff --git a/ofproto/collectors.c b/ofproto/collectors.c
index 74d511d..57dc7ed 100644
--- a/ofproto/collectors.c
+++ b/ofproto/collectors.c
@@ -107,7 +107,7 @@ collectors_destroy(struct collectors *c)
 size_t
 collectors_send(const struct collectors *c, const void *payload, size_t n)
 {
-    uint16_t errors = 0;
+    size_t errors = 0;
 
     if (c) {
         size_t i;
diff --git a/ofproto/ofproto-dpif-ipfix.c b/ofproto/ofproto-dpif-ipfix.c
index eec71d7..0daa214 100644
--- a/ofproto/ofproto-dpif-ipfix.c
+++ b/ofproto/ofproto-dpif-ipfix.c
@@ -1359,13 +1359,13 @@ static void
 ipfix_get_stats__(const struct dpif_ipfix_exporter *exporter,
                   ofproto_ipfix_stats *stats)
 {
-    memset(stats, 0xFF, sizeof *stats);
+    memset(stats, 0xff, sizeof *stats);
 
     if (!exporter) {
         return;
     }
 
-    *stats=exporter->stats;
+    *stats = exporter->stats;
 }
 
 static void
diff --git a/ofproto/ofproto-provider.h b/ofproto/ofproto-provider.h
index 8e25942..93362cd 100644
--- a/ofproto/ofproto-provider.h
+++ b/ofproto/ofproto-provider.h
@@ -1361,16 +1361,13 @@ struct ofproto_class {
         const struct ofproto_ipfix_flow_exporter_options
             *flow_exporters_options, size_t n_flow_exporters_options);
 
-    /* Get IPFIX stats on 'ofproto' according to the exporter of birdge
+    /* Get IPFIX stats on 'ofproto' according to the exporter of bridge
      * IPFIX or flow based IPFIX.
      *
      * OFPERR_NXST_NOT_CONFIGURED as a return value indicates that bridge
      * IPFIX or flow based IPFIX is not configured. */
-    int (*get_ipfix_stats)(
-        const struct ofproto *ofproto,
-        bool bridge_ipfix,
-        struct ovs_list *replies
-        );
+    int (*get_ipfix_stats)(const struct ofproto *ofproto,
+                           bool bridge_ipfix, struct ovs_list *replies);
 
     /* Configures connectivity fault management on 'ofport'.
      *
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