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bug#30807: Tramp tests take waaayyy too long and refuse to exit
From: |
Michael Albinus |
Subject: |
bug#30807: Tramp tests take waaayyy too long and refuse to exit |
Date: |
Wed, 14 Mar 2018 10:07:41 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Paul Eggert <eggert@cs.ucla.edu> writes:
Hi Paul,
> For the past few weeks "make check" has been taking a looooong time on
> Emacs master on my Fedora 27 desktop (AMD Phenom II X4 910e).
All following timings are performed on my 8-years old ThinkPad T500 (Intel
Core2 Duo T9550, 4MB RAM).
Yes, something is wrong. In the emacs-26 branch, I see
--8<---------------cut here---------------start------------->8---
$ time make -C test tramp-tests SELECTOR='$(SELECTOR_DEFAULT)'
28.902u 4.947s 0:36.09 93.7% 0+0k 4448+4568io 0pf+0w
--8<---------------cut here---------------end--------------->8---
The same call in master yields
--8<---------------cut here---------------start------------->8---
$ time make -C test tramp-tests SELECTOR='$(SELECTOR_DEFAULT)'
228.608u 7.401s 4:08.63 94.9% 0+0k 8064+8784io 8pf+0w
--8<---------------cut here---------------end--------------->8---
Up to eight time slower. I will check what's up. (Usually, I run only
the expensive Tramp tests, so I haven't seen this yet)
> and some of the tests in the corresponding script look to be very
> slow. Can this be sped up? Let's mark the slow tests to be expensive,
> so that they are run only if one executes "make check-expensive".
This is already the case. I guess you've uncovered an error, which must
be fixed.
> Worse, there's another long wait here:
>
> GEN lisp/net/tramp-archive-tests.log
>
> after this line is output:
>
> passed 20/22 tramp-archive-test40-file-system-info
I don't see an error here. I get
--8<---------------cut here---------------start------------->8---
$ time make -C test tramp-archive-tests SELECTOR='$(SELECTOR_DEFAULT)'
11.131u 0.678s 0:17.43 67.6% 0+0k 0+104io 0pf+0w
--8<---------------cut here---------------end--------------->8---
This is not superfast (17s duration), but maybe acceptable.
> and here the wait is so long that I gave up trying to run the tests
> and typed control-C to exit them. Presumably the semi-inflooping test
> is tramp-archive-test42-auto-load. (Why is it 42 and not 41? Why are
> there two test42s? I don't know.)
No problem here:
--8<---------------cut here---------------start------------->8---
$ time make -C test tramp-archive-tests
SELECTOR='\"tramp-archive-test42-auto-load\"'
1.505u 0.256s 0:02.64 66.2% 0+0k 0+0io 0pf+0w
--8<---------------cut here---------------end--------------->8---
The reasoning for the test numbering is explained in the comment of
tramp-archive-tests.el:
;; The `tramp-archive-testnn-*' tests correspond to the respective
;; tests in tramp-tests.el.
> Worse yet, after I control-C out of "make check" and get a shell
> prompt back, a subsidiary Emacs that is running the Tramp test refuses
> to exit and continues to chew up CPU time in the background until I
> use "kill 3304" (or whatever) to kill it. This really needs to get
> fixed.
I will try to produce some instrumentation for tramp-archive-test42-auto-load
in order to catch your problem.
> Because of these problems I no longer routinely run "make check".
This is bad, and we shall fix it.
Best regards, Michael.
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Paul Eggert, 2018/03/13
- bug#30807: Tramp tests take waaayyy too long and refuse to exit,
Michael Albinus <=
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Michael Albinus, 2018/03/14
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Paul Eggert, 2018/03/14
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Michael Albinus, 2018/03/15
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Paul Eggert, 2018/03/16
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Michael Albinus, 2018/03/16
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Glenn Morris, 2018/03/16
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Paul Eggert, 2018/03/16
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Michael Albinus, 2018/03/17
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Noam Postavsky, 2018/03/17
- bug#30807: Tramp tests take waaayyy too long and refuse to exit, Paul Eggert, 2018/03/18