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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2016-10-19 02:16:40 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2016-10-19 17:21:49 +0900 |
| commit | 0267399669ca02c9f0c5da59800cd74ee52490ef (patch) | |
| tree | e490ebd064bb3aab9c7197cabd86e6592966cb10 /src | |
| parent | debug: keep alive -> keepalive (diff) | |
| download | wireguard-monolithic-historical-0267399669ca02c9f0c5da59800cd74ee52490ef.tar.xz wireguard-monolithic-historical-0267399669ca02c9f0c5da59800cd74ee52490ef.zip | |
timers: avoid thundering herd for simultaneous initiation
Since it's extremely unlikely for jiffies to be exactly identical
everywhere, applying quarter second power of two slack not only improves
power efficiency but also ensures that retries have a bit of jitter.
Diffstat (limited to 'src')
| -rw-r--r-- | src/timers.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/timers.c b/src/timers.c index d16d7d1..c37b294 100644 --- a/src/timers.c +++ b/src/timers.c @@ -123,7 +123,7 @@ void timers_handshake_initiated(struct wireguard_peer *peer) if (likely(peer->timer_send_keepalive.data)) del_timer(&peer->timer_send_keepalive); if (likely(peer->timer_retransmit_handshake.data)) - mod_timer(&peer->timer_retransmit_handshake, jiffies + REKEY_TIMEOUT); + mod_timer(&peer->timer_retransmit_handshake, slack_time(jiffies + REKEY_TIMEOUT + HZ / 4)); } /* Should be called after a handshake response message is received and processed. */ |