https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
Martin Liška changed:
What|Removed |Added
Resolution|WORKSFORME |---
Status|RESOLVED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #9 from Jan Hubicka ---
Also forgot to mention, it is also quite possible that some of the small
divergences propagate themselves into differences in the histogram and
thus differences in hot/cold decisions in completely unrelated cod
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #8 from Jan Hubicka ---
The divergence for non-randomization seems under control. But it also
seems that the divergence for randomized build is way too common to be
explained by differences in number of conflicts for hashtables hasing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #7 from Martin Liška ---
Created attachment 47697
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47697&action=edit
GCOV dump diff
There's still some difference, but rather small.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
Martin Liška changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #5 from Martin Liška ---
And there's also a difference in TOPN counters:
diff -u a b
--- a 2020-01-23 10:30:56.527098370 +0100
+++ b 2020-01-23 10:30:42.035189528 +0100
@@ -1,21 +1,21 @@
-== Stats for after ==
+== Stats for befor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #4 from Martin Liška ---
(In reply to Jakub Jelinek from comment #2)
> Couldn't e.g. address space randomization of the instrumented binaries
> (compiler itself) matter?
I must confirm that the machine where I run it has ASLR enabled
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
--- Comment #3 from Richard Biener ---
(In reply to Jakub Jelinek from comment #2)
> Couldn't e.g. address space randomization of the instrumented binaries
> (compiler itself) matter?
I bet some hash-tables could end up with different access pat
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93398
Martin Liška changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed|
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