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* [Bug other/94330] New: No warning if jobserver not available
@ 2020-03-25 15:34 rdiezmail-gcc at yahoo dot de
2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: rdiezmail-gcc at yahoo dot de @ 2020-03-25 15:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Bug ID: 94330
Summary: No warning if jobserver not available
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: rdiezmail-gcc at yahoo dot de
Target Milestone: ---
If you pass -flto=jobserver , and the jobserver file descriptors are not
actually available, you get no warning whatsoever from GCC.
GNU Make does try to help in this scenario with the following warning:
make[1]: warning: jobserver unavailable: using -j1. Add `+' to parent make
rule.
Without such a warning, it is really easy to miss the opportunity to
parallelise the build. In fact, GCC seems to use 2 threads in this scenario,
which misleads you into thinking that the option is working correctly, when in
fact is not using all other CPU cores.
More context on this issue is here:
https://lists.gnu.org/archive/html/help-make/2020-02/msg00000.html
https://gcc.gnu.org/legacy-ml/gcc-help/2020-02/msg00069.html
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug driver/94330] No warning if jobserver not available 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de @ 2020-03-26 6:55 ` rguenth at gcc dot gnu.org 2020-03-26 9:00 ` marxin at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-03-26 6:55 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Component|other |driver Keywords| |lto Ever confirmed|0 |1 Last reconfirmed| |2020-03-26 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de 2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org @ 2020-03-26 9:00 ` marxin at gcc dot gnu.org 2020-03-26 9:41 ` marxin at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: marxin at gcc dot gnu.org @ 2020-03-26 9:00 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330 Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org CC| |marxin at gcc dot gnu.org --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- I've got patch for it. @Richi: Is it stage1 material or can we add it for GCC 10? ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de 2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org 2020-03-26 9:00 ` marxin at gcc dot gnu.org @ 2020-03-26 9:41 ` marxin at gcc dot gnu.org 2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org 2020-05-05 14:13 ` marxin at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: marxin at gcc dot gnu.org @ 2020-03-26 9:41 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330 Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- URL| |https://gcc.gnu.org/piperma | |il/gcc-patches/2020-March/5 | |42715.html Keywords| |patch Target Milestone|--- |11.0 --- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> --- I'm just sent the patch to the mailing list. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de ` (2 preceding siblings ...) 2020-03-26 9:41 ` marxin at gcc dot gnu.org @ 2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org 2020-05-05 14:13 ` marxin at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2020-05-05 14:11 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330 --- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>: https://gcc.gnu.org/g:0f62caf58b5d11f375f789385d6d49891ebd9a94 commit r11-81-g0f62caf58b5d11f375f789385d6d49891ebd9a94 Author: Martin Liska <mliska@suse.cz> Date: Tue May 5 16:11:33 2020 +0200 Provide warning for missing jobserver. PR driver/94330 * lto-wrapper.c (run_gcc): When using -flto=jobserver, report warning when the jobserver is not detected. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de ` (3 preceding siblings ...) 2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org @ 2020-05-05 14:13 ` marxin at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: marxin at gcc dot gnu.org @ 2020-05-05 14:13 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330 Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|ASSIGNED |RESOLVED --- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- Fixed on master. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-05-05 14:13 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de 2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org 2020-03-26 9:00 ` marxin at gcc dot gnu.org 2020-03-26 9:41 ` marxin at gcc dot gnu.org 2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org 2020-05-05 14:13 ` marxin at gcc dot gnu.org
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