Date: Wed, 20 Sep 2023 16:09:03 +0900
Cc: 66096@debbugs.gnu.org, "ishikawa, chiaki" <ishikawa@yk.rim.or.jp>
From: "ISHIKAWA,chiaki" <ishikawa@yk.rim.or.jp>
I have the following code snippet to monitor GC issues on my PC for
quite sometime.
But I have not seen this particular problem before.
The long pause I have seen before was strictly in GC-related routines.
(setq my-gc-statistics (make-vector 30 nil))
;;; The element is
;;; (append (memory-use-counts) (list gc-elapsed gcs-done))
;;; Each time the following function is called, the
;;; elements in the array is shifted toward the end.
;;; Use (message "%S" my-gc-statistics) to force the
;;; recording of my-gc-statistics value in *Messages* buffer for later
analysis.
(defun update-my-gc-statistics ()
(let ((i 28))
(progn
;;; very unlike Lisp
(while (<= 0 i)
(progn (aset my-gc-statistics (+ 1 i) (aref my-gc-statistics i))
(setq i (- i 1) )))
(aset my-gc-statistics 0
(append (memory-use-counts) (list gc-elapsed gcs-done)))
;;; print the latest one last so that I can see the glimpse in the
narrow
;;; output window.
(message "%S\n%S" (current-time-string) (pp (reverse
my-gc-statistics))))))
(setq post-gc-hook 'update-my-gc-statistics)
For example, in one place, I see
#0 0x0000556f1905be9e in string_char_and_length
(length=<synthetic pointer>, p=0x556f20d8a3d8 " 70337 417360
2.323839139 50)\n (99058573 3875 59193441 34949 11084445 70337 417401
2.391973008 51)]\n\"") at
/home/ishikawa/repos/emacs-29.1/src/character.h:375
And that string is probably from (append (memory-use-counts) (list
gc-elapsed gcs-done))
I tried to run with this, and I don't see any such infloop. I see the
GC results displayed in the echo-area once in a while.
I guess some other customizations cause this, or maybe some special
circumstances with different fonts you use. Customizations that
affect the echo-area display and resizing are of main interest. If
you can try to reproduce this in "emacs -Q", with only the
post-gc-hook defined and as little of your other customizations as
possible, it could help.
Also I see recursive_edit at the bottom of the stakctrace.
Not sure why. Maybe I was doing some error recovery of Japanese input?
No, this is normal: Emacs enters one level of recursive-edit when it
starts.