From 452cfaacfc6e6b4313d2170c29e18d6399038999 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Mon, 11 Mar 2013 22:06:07 -0400
Subject: Track TLS overhead: diagnostic for bug 7707

---
 src/or/status.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/or')

diff --git a/src/or/status.c b/src/or/status.c
index 126167dcb9..e44de635cb 100644
--- a/src/or/status.c
+++ b/src/or/status.c
@@ -85,6 +85,7 @@ log_heartbeat(time_t now)
   char *bw_rcvd = NULL;
   char *uptime = NULL;
   const routerinfo_t *me;
+  double r = tls_get_write_overhead_ratio();
 
   const or_options_t *options = get_options();
   (void)now;
@@ -112,6 +113,11 @@ log_heartbeat(time_t now)
         100*(U64_TO_DBL(stats_n_data_bytes_packaged) /
              U64_TO_DBL(stats_n_data_cells_packaged*RELAY_PAYLOAD_SIZE)) );
 
+  if (r > 1.0) {
+    double overhead = ( r - 1.0 ) * 100.0;
+    log_notice(LD_HEARTBEAT, "TLS write overhead: %.f%%", overhead);
+  }
+
   tor_free(uptime);
   tor_free(bw_sent);
   tor_free(bw_rcvd);
-- 
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