commit c9f07f36bf986f274ac9fc56b5c61bbcc669b22e Author: Nick Mathewson nickm@torproject.org Date: Thu May 3 12:23:55 2018 -0400

Mark the 1-per-sec update_current_time() call as redundant.

We still do this time update here, since we do it from all callbacks, but it is no longer a reason to keep the once-per-second callback enabled.

Closes ticket 26009. --- changes/ticket26009 | 9 +++++++++ src/or/main.c | 6 +++++- 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/changes/ticket26009 b/changes/ticket26009 new file mode 100644 index 000000000..51ada1572 --- /dev/null +++ b/changes/ticket26009 @@ -0,0 +1,9 @@ + o Minor features (mainloop): + - Move responsibility for + keeping track of Tor's uptime + from a nce-per-second callback to a callback that is only scheduled as + needed. Once enough items are removed from our once-per-second + callback, we can eliminate it entirely to conserve CPU when idle. + Closes ticket + 26009. + diff --git a/src/or/main.c b/src/or/main.c index e82162c39..b6035fa76 100644 --- a/src/or/main.c +++ b/src/or/main.c @@ -2576,8 +2576,12 @@ second_elapsed_callback(periodic_timer_t *timer, void *arg)

n_libevent_errors = 0;

- /* log_notice(LD_GENERAL, "Tick."); */ now = time(NULL); + + /* We don't need to do this once-per-second any more: time-updating is + * only in this callback _because it is a callback_. It should be fine + * to disable this callback, and the time will still get updated. + */ update_current_time(now);

/* the second has rolled over. check more stuff. */