From: Noam Postavsky <npostavs@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 32452@debbugs.gnu.org
Subject: bug#32452: 26.1; gnutls_try_handshake maxes out cpu retrying when server is a bit busy
Date: Fri, 17 Aug 2018 18:10:32 -0400 [thread overview]
Message-ID: <87ftzcwso7.fsf@gmail.com> (raw)
In-Reply-To: <83d0uhgoxw.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 17 Aug 2018 15:25:31 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
> In which case it's fine, we just need to do something in the loop to
> yield the CPU, like some nanosleep, perhaps? And maybe enlarge the
> sleep period as time goes on?
>
> debbugs is terribly slow in a browser as well, right now. But
> hundreds of attempts sounds excessive to me.
The debbugs server seems back to normal speeds now, I'm getting ~200
hits with it just like other servers. The patch below brings it down to
15~20. nanosleep isn't portable though right? Not sure what to put
instead, it seems existing wait functions in Emacs are all tied up with
threads and processes, so I don't know if it's safe to call them here.
--- i/src/gnutls.c
+++ w/src/gnutls.c
@@ -550,6 +550,8 @@ gnutls_try_handshake (struct Lisp_Process *proc)
if (non_blocking)
proc->gnutls_p = true;
+ enum { MAX_DELAY_NS = 100 * 1000 * 1000 }; // Max 100ms delay.
+ struct timespec delay = { 0, 1000 };
do
{
ret = gnutls_handshake (state);
@@ -558,7 +560,9 @@ gnutls_try_handshake (struct Lisp_Process *proc)
}
while (ret < 0
&& gnutls_error_is_fatal (ret) == 0
- && ! non_blocking);
+ && ! non_blocking
+ && (nanosleep (&delay, NULL),
+ delay.tv_nsec = min (delay.tv_nsec * 2, MAX_DELAY_NS)));
proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED;
next prev parent reply other threads:[~2018-08-17 22:10 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 12:13 bug#32452: 26.1; gnutls_try_handshake maxes out cpu retrying when server is a bit busy Noam Postavsky
2018-08-16 12:49 ` Noam Postavsky
2018-08-16 13:41 ` Eli Zaretskii
2018-08-16 14:45 ` Noam Postavsky
2018-08-16 17:33 ` Eli Zaretskii
2018-08-17 1:02 ` Noam Postavsky
2018-08-17 5:59 ` Eli Zaretskii
2018-08-17 11:55 ` Noam Postavsky
2018-08-17 12:25 ` Eli Zaretskii
2018-08-17 22:10 ` Noam Postavsky [this message]
2018-08-18 6:34 ` Eli Zaretskii
2018-08-21 0:52 ` Noam Postavsky
2018-08-21 2:42 ` Eli Zaretskii
2022-02-21 15:20 ` Lars Ingebrigtsen
2022-02-23 19:45 ` Paul Eggert
2022-02-23 19:48 ` Lars Ingebrigtsen
2022-02-23 22:29 ` Paul Eggert
2022-02-23 22:40 ` Lars Ingebrigtsen
2022-02-24 3:09 ` Paul Eggert
2022-02-24 8:57 ` Lars Ingebrigtsen
2022-02-24 18:20 ` Paul Eggert
2022-02-25 2:19 ` Lars Ingebrigtsen
2022-02-25 2:27 ` Lars Ingebrigtsen
2022-02-25 20:41 ` Paul Eggert
[not found] ` <6f364184-7fa8-04f3-44a9-22ce40b872e8@cs.ucla.edu>
2022-02-26 15:12 ` Lars Ingebrigtsen
2022-02-26 15:37 ` Eli Zaretskii
[not found] ` <83ee3pprkr.fsf@gnu.org>
2022-02-26 16:04 ` Lars Ingebrigtsen
[not found] ` <87pmn9txzo.fsf@gnus.org>
2022-02-28 8:59 ` Lars Ingebrigtsen
[not found] ` <87ee3ns6x0.fsf@gnus.org>
2022-02-28 12:28 ` Eli Zaretskii
[not found] ` <83y21vmaye.fsf@gnu.org>
2022-02-28 12:31 ` Lars Ingebrigtsen
2022-02-28 12:35 ` Lars Ingebrigtsen
[not found] ` <877d9fnp7g.fsf@gnus.org>
2022-02-28 12:46 ` Eli Zaretskii
2022-02-28 21:47 ` Paul Eggert
[not found] ` <78c5037a-ac96-e7be-532f-b1776ed25b2b@cs.ucla.edu>
2022-03-01 15:36 ` Lars Ingebrigtsen
[not found] ` <87a6e9n0rg.fsf@gnus.org>
2022-03-01 18:27 ` Paul Eggert
[not found] ` <d0cfd485-2be6-5873-64dc-2926c2f2bae0@cs.ucla.edu>
2022-03-01 18:52 ` Lars Ingebrigtsen
[not found] ` <87czj5ld38.fsf@gnus.org>
2022-03-02 1:00 ` Paul Eggert
[not found] ` <d24b1278-1aeb-e17d-ed06-7d36c5e3b68b@cs.ucla.edu>
2022-03-02 1:22 ` Lars Ingebrigtsen
2022-03-02 1:43 ` Lars Ingebrigtsen
[not found] ` <87y21tjggy.fsf@gnus.org>
2022-03-02 2:12 ` Paul Eggert
[not found] ` <ab47871e-ad1e-e06d-c226-ab7b7c9bb857@cs.ucla.edu>
2022-03-03 13:46 ` Lars Ingebrigtsen
2022-03-03 13:49 ` Lars Ingebrigtsen
[not found] ` <87czj3jgdd.fsf@gnus.org>
2022-03-03 15:11 ` Eli Zaretskii
2022-03-04 15:28 ` Lars Ingebrigtsen
2022-03-04 16:47 ` Lars Ingebrigtsen
2022-03-04 19:46 ` Eli Zaretskii
2022-03-05 17:11 ` Lars Ingebrigtsen
2022-03-05 17:47 ` Eli Zaretskii
2022-03-05 18:06 ` Lars Ingebrigtsen
2022-03-09 3:01 ` Paul Eggert
[not found] ` <87h78fjgi7.fsf@gnus.org>
2022-03-03 21:40 ` Paul Eggert
[not found] ` <0756f1bd-1348-84ef-4eb8-4cc25eacf1dd@cs.ucla.edu>
2022-03-04 15:31 ` Lars Ingebrigtsen
2019-09-24 5:39 ` Lars Ingebrigtsen
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