diff --git a/src/cli.c b/src/cli.c
index 149ecd7..3e62c31 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -855,6 +855,53 @@
 	return 1;
 }
 
+/* This function dumps some activity counters used by developers and support to
+ * rule out some hypothesis during bug reports. It returns 0 if the output
+ * buffer is full and it needs to be called again, otherwise non-zero. It dumps
+ * everything at once in the buffer and is not designed to do it in multiple
+ * passes.
+ */
+static int cli_io_handler_show_activity(struct appctx *appctx)
+{
+	struct stream_interface *si = appctx->owner;
+	int thr;
+
+	if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
+		return 1;
+
+	chunk_reset(&trash);
+
+	chunk_appendf(&trash, "thread_id: %u", tid);
+	chunk_appendf(&trash, "\ndate_now: %lu.%06lu", (long)now.tv_sec, (long)now.tv_usec);
+	chunk_appendf(&trash, "\nloops:");        for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].loops);
+	chunk_appendf(&trash, "\nwake_cache:");   for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].wake_cache);
+	chunk_appendf(&trash, "\nwake_tasks:");   for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].wake_tasks);
+	chunk_appendf(&trash, "\nwake_applets:"); for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].wake_applets);
+	chunk_appendf(&trash, "\nwake_signal:");  for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].wake_signal);
+	chunk_appendf(&trash, "\npoll_exp:");     for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].poll_exp);
+	chunk_appendf(&trash, "\npoll_drop:");    for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].poll_drop);
+	chunk_appendf(&trash, "\npoll_dead:");    for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].poll_dead);
+	chunk_appendf(&trash, "\npoll_skip:");    for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].poll_skip);
+	chunk_appendf(&trash, "\nfd_skip:");      for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].fd_skip);
+	chunk_appendf(&trash, "\nfd_lock:");      for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].fd_lock);
+	chunk_appendf(&trash, "\nfd_del:");       for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].fd_del);
+	chunk_appendf(&trash, "\nconn_dead:");    for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].conn_dead);
+	chunk_appendf(&trash, "\nstream:");       for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].stream);
+	chunk_appendf(&trash, "\nempty_rq:");     for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].empty_rq);
+	chunk_appendf(&trash, "\nlong_rq:");      for (thr = 0; thr < global.nbthread; thr++) chunk_appendf(&trash, " %u", activity[thr].long_rq);
+
+	chunk_appendf(&trash, "\n");
+
+	if (ci_putchk(si_ic(si), &trash) == -1) {
+		chunk_reset(&trash);
+		chunk_printf(&trash, "[output too large, cannot dump]\n");
+		si_applet_cant_put(si);
+	}
+
+	/* dump complete */
+	return 1;
+}
+
 /*
  * CLI IO handler for `show cli sockets`.
  * Uses ctx.cli.p0 to store the restart pointer.
@@ -1428,6 +1475,7 @@
 	{ { "show", "env",  NULL }, "show env [var] : dump environment variables known to the process", cli_parse_show_env, cli_io_handler_show_env, NULL },
 	{ { "show", "cli", "sockets",  NULL }, "show cli sockets : dump list of cli sockets", cli_parse_default, cli_io_handler_show_cli_sock, NULL },
 	{ { "show", "fd", NULL }, "show fd [num] : dump list of file descriptors in use", cli_parse_show_fd, cli_io_handler_show_fd, NULL },
+	{ { "show", "activity", NULL }, "show activity : show per-thread activity stats (for support/developers)", cli_parse_default, cli_io_handler_show_activity, NULL },
 	{ { "_getsocks", NULL }, NULL,  _getsocks, NULL },
 	{{},}
 }};