https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
qinzhao at gcc dot gnu.org changed:
What|Removed |Added
CC||qinzhao at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #3 from Sam James ---
There's some trace output at
https://github.com/systemd/systemd/issues/26950#issue-1637752077 but it's not
quite the same as perf output.
But they do identify some bad functions:
"""
Observations:
manager_
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #4 from Andrew Pinski ---
>From that github issue:
Internal memory management to take exponentially longer on at least ARM
platforms.
This narrows things down slightly. But it also makes me think there is some
brokenness inside sys
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #5 from Andrew Pinski ---
Hmm, systemd uses the cleanup attribute ...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #6 from Andrew Pinski ---
(In reply to Sam James from comment #3)
> manager_deserialize takes ~1s instead of ~0.2s
I looked into manager-serialize.c and its code generation with and without
-ftrivial-auto-var-init=zero and there
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #7 from Andrew Pinski ---
One thing I noticed is that malloc_usable_size is used for greedy_realloc but
that should not change based on if -ftrivial-auto-var-init is used or not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #8 from Andrew Pinski ---
I also looked into extracting greedy_realloc into its own file and I don't see
anything which would cause -ftrivial-auto-var-init=zero any difference.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
Andrew Pinski changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
--- Comment #10 from qinzhao at gcc dot gnu.org ---
(In reply to Andrew Pinski from comment #9)
> Anways systemd has now changed the buffer to 256 which is much much smaller
> and for most calls enough in size before needing to reallocate the bu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111523
Sam James changed:
What|Removed |Added
CC||siddhesh at gcc dot gnu.org
--- Comment #1
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