From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#61667: 29.0.60; Failure to redisplay Date: Wed, 01 Mar 2023 12:50:33 +0800 Message-ID: <87zg8xyt0m.fsf@yahoo.com> References: <04d7cb31-684c-07c0-ee7b-503514fc1a85@yandex.ru> <1dafb35c-657c-037f-8244-4568b4e22fcd@yandex.ru> <8716b41c9708333e6bdb@heytings.org> <6f161919-7ee4-e461-e688-797c76fa6d74@yandex.ru> <83fsatj57m.fsf@gnu.org> <83356sk4jk.fsf@gnu.org> <2d674d22-fe8c-b7a3-115f-515a8a37b7e5@yandex.ru> <831qmck3qt.fsf@gnu.org> <41c5671e-e9c3-33f3-6c9c-8a1a6fc527fb@yandex.ru> <83ttz8ils1.fsf@gnu.org> <8716b41c9716878d8cb9@heytings.org> <8716b41c97839d6a8b87@heytings.org> <7fee18a7-3307-b6de-1428-ae17d51c85af@yandex.ru> <9ac9271f1ee55a9b8bbf@heytings.org> <87a60y13ou.fsf@yahoo.com> <674e150e-fcbe-7d67-962e-214cfaec2ca0@yandex.ru> <875ybl1dii.fsf@yahoo.com> <2b249c97-db63-34e1-80c2-0c898005e31f@yandex.ru> Reply-To: Po Lu Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; 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Hermes SMTP Server) with ESMTPA ID 36a2d5c201f70f78b5a860c016136712; Wed, 01 Mar 2023 04:50:37 +0000 (UTC) In-Reply-To: <2b249c97-db63-34e1-80c2-0c898005e31f@yandex.ru> (Dmitry Gutov's message of "Wed, 1 Mar 2023 03:25:05 +0200") X-Mailer: WebService/1.1.21221 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:257031 Archived-At: Dmitry Gutov writes: > On 01/03/2023 03:11, Po Lu wrote: >> Dmitry Gutov writes: >> >>> Why does constant frame-title-format fix this, though? >> Because presumably Mutter has no need to damage the title bar, which >> you >> do see changing. >> >>> I have tried this with default config (double buffering on, >>> undecorated off), and I don't see any delay between text insertion and >>> frame title changes. 1 second pause, "Test 1" is inserted, the title >>> changes (*), 1 second pause, "Test 2" is inserted, the title changes. >>> >>> That probably means I don't need to test the alternative configs, >>> right? >> Yes, but that's odd. What if you run the entire test in an infinite >> loop? >> Do you eventually notice a delay? > > Originally I ran the test a couple of dozen times (restating Emacs > every try), like I do with the MRE scenario when testing different > settings. > > Now I re-ran it with (dotimes (i 20) ...) twice, and didn't see the > problem either. > > Not sure how infinite you want this loop to be, but the original > scenarios would almost certainly have showed the problem several times > over this many tries. OK, I have to be 100% sure we're not missing something here. With stderr redirected to a file, and the following instrumentation applied:: diff --git a/src/xfns.c b/src/xfns.c index 9e004f6a678..b4bef7f38fd 100644 --- a/src/xfns.c +++ b/src/xfns.c @@ -2232,6 +2232,18 @@ x_set_name_internal (struct frame *f, Lisp_Object name) SDATA (encoded_icon_name), SBYTES (encoded_icon_name)); + long long + current_ust (void) + { + struct timespec ts; + + clock_gettime (CLOCK_MONOTONIC, &ts); + return ts.tv_sec * 1000000 + ts.tv_nsec / 1000; + } + + fprintf (stderr, "x_set_title: %s, %lld\n", + SSDATA (name), current_ust ()); + if (do_free_icon_value) xfree (icon.value); if (do_free_text_value) diff --git a/src/xterm.c b/src/xterm.c index 70bcb67d80d..c7ad1bbb722 100644 --- a/src/xterm.c +++ b/src/xterm.c @@ -7439,6 +7439,18 @@ show_back_buffer (struct frame *f) swap_info.swap_action = XdbeCopied; XdbeSwapBuffers (FRAME_X_DISPLAY (f), &swap_info, 1); + long long + current_ust (void) + { + struct timespec ts; + + clock_gettime (CLOCK_MONOTONIC, &ts); + return ts.tv_sec * 1000000 + ts.tv_nsec / 1000; + } + + fprintf (stderr, "show_back_buffer: %lld\n", + current_ust ()); + #if defined HAVE_XSYNC && !defined USE_GTK && defined HAVE_CLOCK_GETTIME /* Finish the frame here. */ x_sync_update_finish (f); do you see a significant amount of time taken between setting the title and swapping buffers?