https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94369
--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I did not save the reported number of samples but from the raw sample
numbers and percentage points it seems so:
(562770/0.4013)/(518450/0.3953) = 1.069
Nevertheless, I did save separately obtained perf stat numbers which
also look similar (and the number of branches might be a clue):
LTO:
326083.03 msec task-clock:u # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
8821 page-faults:u # 0.027 K/sec
1080945983089 cycles:u #
(83.33%)
21883016095 stalled-cycles-frontend:u # 2.02% frontend cycles
idle (83.33%)
435184347885 stalled-cycles-backend:u # 40.26% backend cycles
idle (83.33%)
847570680279 instructions:u # 0.78 insn per cycle
# 0.51 stalled cycles per
insn (83.34%)
147428907202 branches:u # 452.121 M/sec
(83.33%)
13395643229 branch-misses:u # 9.09% of all branches
(83.33%)
326.436794016 seconds time elapsed
325.869528000 seconds user
0.086873000 seconds sys
vs. PGO+LTO:
347929.80 msec task-clock:u # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
8535 page-faults:u # 0.025 K/sec
1153803509197 cycles:u #
(83.33%)
19911862620 stalled-cycles-frontend:u # 1.73% frontend cycles
idle (83.33%)
476343319558 stalled-cycles-backend:u # 41.28% backend cycles
idle (83.33%)
894092414890 instructions:u # 0.77 insn per cycle
# 0.53 stalled cycles per
insn (83.33%)
173999066006 branches:u # 500.098 M/sec
(83.33%)
13698979291 branch-misses:u # 7.87% of all branches
(83.34%)
348.308607033 seconds time elapsed
347.711752000 seconds user
0.090975000 seconds sys
