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Re: Big find_cross_jump performance regression.
- To: lucier at math dot purdue dot edu, matzmich at cs dot tu-berlin dot de
- Subject: Re: Big find_cross_jump performance regression.
- From: Brad Lucier <lucier at math dot purdue dot edu>
- Date: Mon, 22 May 2000 13:22:33 -0500 (EST)
- Cc: gcc at gcc dot gnu dot org, feeley at iro dot umontreal dot ca
> Must be something depending on the machine description. Could you try with
> -Os? I get normal results. Even for -O2 with a profiled compiler:
> % ./cc1 -O2 ./new_t-c-2.i
With -Os I get the usual stuff:
popov-223% /export/u11/lucier/programs/egcs/objdir/gcc/cc1 -fpic -fno-math-errno -mieee -mcpu=ev6 -Os _t-c-2.i
__copysignf copysignf __copysign copysign __fabsf fabsf __fabs fabs __floorf __floor floorf floor __fdimf fdimf __fdim fdim ___H__20___t_2d_c_2d_2 {GC 41768k -> 8032k} {GC 10444k -> 7981k} {GC 11187k -> 8463k} {GC 12507k -> 9358k} {GC 14604k -> 9711k} ___init_proc {GC 25415k -> 2100k} ____20___t_2d_c_2d_2
Execution times (seconds)
garbage collection : 0.44 ( 1%) usr 0.00 ( 0%) sys 0.44 ( 1%) wall
parser : 2.61 ( 4%) usr 0.14 ( 8%) sys 2.75 ( 4%) wall
varconst : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
integration : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
jump : 15.63 (23%) usr 0.07 ( 4%) sys 15.75 (23%) wall
CSE : 0.81 ( 1%) usr 0.00 ( 0%) sys 0.81 ( 1%) wall
global CSE : 32.70 (48%) usr 0.30 (17%) sys 33.00 (47%) wall
loop analysis : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall
CSE 2 : 0.65 ( 1%) usr 0.00 ( 0%) sys 0.66 ( 1%) wall
flow analysis : 0.73 ( 1%) usr 0.01 ( 1%) sys 0.75 ( 1%) wall
combiner : 0.67 ( 1%) usr 0.00 ( 0%) sys 0.68 ( 1%) wall
if-conversion : 0.21 ( 0%) usr 0.01 ( 1%) sys 0.23 ( 0%) wall
regmove : 0.23 ( 0%) usr 0.00 ( 0%) sys 0.23 ( 0%) wall
scheduling : 3.01 ( 4%) usr 0.68 (38%) sys 3.70 ( 5%) wall
local alloc : 0.52 ( 1%) usr 0.00 ( 0%) sys 0.52 ( 1%) wall
global alloc : 0.88 ( 1%) usr 0.04 ( 2%) sys 0.92 ( 1%) wall
reload CSE regs : 4.32 ( 6%) usr 0.00 ( 0%) sys 4.32 ( 6%) wall
flow 2 : 0.65 ( 1%) usr 0.00 ( 1%) sys 0.66 ( 1%) wall
if-conversion 2 : 0.13 ( 0%) usr 0.00 ( 0%) sys 0.14 ( 0%) wall
peephole 2 : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
scheduling 2 : 2.76 ( 4%) usr 0.45 (25%) sys 3.21 ( 5%) wall
shorten branches : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.05 ( 0%) wall
final : 0.31 ( 0%) usr 0.00 ( 0%) sys 0.31 ( 0%) wall
symout : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
rest of compilation : 0.34 ( 1%) usr 0.00 ( 0%) sys 0.34 ( 1%) wall
TOTAL : 67.88 1.78 69.71
and with -O2 I get the usual stuff:
popov-232% /export/u11/lucier/programs/egcs/objdir/gcc/cc1 -fpic -fno-math-errno -mieee -mcpu=ev6 -O2 _t-c-2.i
__copysignf copysignf __copysign copysign __fabsf fabsf __fabs fabs __floorf __floor floorf floor __fdimf fdimf __fdim fdim ___H__20___t_2d_c_2d_2 {GC 41768k -> 8032k} {GC 10503k -> 8011k} {GC 11513k -> 8455k} {GC 12500k -> 9350k} {GC 14653k -> 9717k} ___init_proc {GC 25365k -> 2100k} ____20___t_2d_c_2d_2
Execution times (seconds)
garbage collection : 0.45 ( 0%) usr 0.00 ( 0%) sys 0.45 ( 0%) wall
parser : 2.62 ( 3%) usr 0.19 (11%) sys 2.82 ( 3%) wall
varconst : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
integration : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
jump : 11.93 (13%) usr 0.07 ( 4%) sys 12.05 (13%) wall
CSE : 0.81 ( 1%) usr 0.00 ( 0%) sys 0.81 ( 1%) wall
global CSE : 58.98 (65%) usr 0.27 (15%) sys 59.54 (64%) wall
loop analysis : 0.09 ( 0%) usr 0.00 ( 0%) sys 0.09 ( 0%) wall
CSE 2 : 0.67 ( 1%) usr 0.00 ( 0%) sys 0.67 ( 1%) wall
flow analysis : 0.77 ( 1%) usr 0.01 ( 1%) sys 0.83 ( 1%) wall
combiner : 0.69 ( 1%) usr 0.00 ( 0%) sys 0.70 ( 1%) wall
if-conversion : 0.22 ( 0%) usr 0.01 ( 1%) sys 0.23 ( 0%) wall
regmove : 0.24 ( 0%) usr 0.00 ( 0%) sys 0.24 ( 0%) wall
scheduling : 2.85 ( 3%) usr 0.51 (28%) sys 3.36 ( 4%) wall
local alloc : 0.55 ( 1%) usr 0.00 ( 0%) sys 0.55 ( 1%) wall
global alloc : 0.89 ( 1%) usr 0.02 ( 1%) sys 0.92 ( 1%) wall
reload CSE regs : 4.44 ( 5%) usr 0.04 ( 2%) sys 4.48 ( 5%) wall
flow 2 : 0.69 ( 1%) usr 0.01 ( 1%) sys 0.71 ( 1%) wall
if-conversion 2 : 0.12 ( 0%) usr 0.01 ( 1%) sys 0.13 ( 0%) wall
peephole 2 : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
scheduling 2 : 3.35 ( 4%) usr 0.62 (34%) sys 3.97 ( 4%) wall
shorten branches : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
final : 0.34 ( 0%) usr 0.00 ( 0%) sys 0.35 ( 0%) wall
symout : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
rest of compilation : 0.35 ( 0%) usr 0.00 ( 0%) sys 0.38 ( 0%) wall
TOTAL : 91.24 1.81 93.46
It is only with -O1 that I have the problem.
Brad