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* Re: optimization/4121: split_all_insns performance bottleneck
@ 2003-02-19 15:26 gerald
0 siblings, 0 replies; 2+ messages in thread
From: gerald @ 2003-02-19 15:26 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, lucier, nobody
Synopsis: split_all_insns performance bottleneck
State-Changed-From-To: open->closed
State-Changed-By: gerald
State-Changed-When: Wed Feb 19 15:26:12 2003
State-Changed-Why:
Fixed, according to the reporter.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4121
^ permalink raw reply [flat|nested] 2+ messages in thread
* optimization/4121: split_all_insns performance bottleneck
@ 2001-08-24 17:06 lucier
0 siblings, 0 replies; 2+ messages in thread
From: lucier @ 2001-08-24 17:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 4121
>Category: optimization
>Synopsis: split_all_insns performance bottleneck
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Aug 24 17:06:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: B. Lucier
>Release: 3.1 20010824 (experimental)
>Organization:
>Environment:
sparc-sun-solaris28
>Description:
The following PR can probably be closed now
http://gcc.gnu.org/ml/gcc-prs/2001-08/msg00184.html
The current problem when compiling
http://www.math.purdue.edu/~lucier/all.i.gz
seems to be that split_all_insns calls find_sub_basic_block each time
the CFG is altered. Here is the timing and profiling data with
banach-109% /pkgs/gcc-2.96/bin/gcc -v
Reading specs from /pkgs/gcc-2.96/lib/gcc-lib/sparc-sun-solaris2.8/3.1/specs
Configured with: ../configure --prefix=/pkgs/gcc-2.96 --enable-checking=no --enable-languages=c
Thread model: posix
gcc version 3.1 20010824 (experimental)
and the calling options
/pkgs/gcc-2.96/lib/gcc-lib/sparc-sun-solaris2.8/3.1//cc1 -fPIC -O1 -fschedule-insns2 -fno-math-errno -fno-strict-aliasing -mcpu=supersparc -mtune=ultrasparc -Wall -W -Wno-unused all.i
___H__20_all {GC 72513k -> 24052k} {GC 32111k -> 25325k} {GC 33960k -> 25286k} {GC 40663k -> 24398k} {GC 37453k -> 27411k} {GC 50777k -> 30006k} ___init_proc ____20_all
Execution times (seconds)
garbage collection : 6.33 ( 0%) usr 0.00 ( 0%) sys 6.44 ( 0%) wall
cfg construction : 184.32 ( 6%) usr 14.80 (49%) sys 199.06 ( 6%) wall
cfg cleanup : 529.64 (16%) usr 0.00 ( 0%) sys 529.69 (16%) wall
preprocessing : 2.26 ( 0%) usr 3.03 (10%) sys 4.88 ( 0%) wall
lexical analysis : 2.28 ( 0%) usr 6.28 (21%) sys 8.94 ( 0%) wall
parser : 16.05 ( 0%) usr 4.14 (14%) sys 20.25 ( 1%) wall
varconst : 0.74 ( 0%) usr 0.01 ( 0%) sys 0.62 ( 0%) wall
jump : 13.81 ( 0%) usr 0.03 ( 0%) sys 13.88 ( 0%) wall
CSE : 12.64 ( 0%) usr 0.00 ( 0%) sys 12.75 ( 0%) wall
loop analysis : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
flow analysis : 180.06 ( 5%) usr 1.16 ( 4%) sys 181.25 ( 5%) wall
combiner : 13.89 ( 0%) usr 0.01 ( 0%) sys 13.94 ( 0%) wall
if-conversion : 9.96 ( 0%) usr 0.01 ( 0%) sys 10.00 ( 0%) wall
local alloc : 6.35 ( 0%) usr 0.00 ( 0%) sys 6.38 ( 0%) wall
global alloc : 23.79 ( 1%) usr 0.62 ( 2%) sys 24.44 ( 1%) wall
reload CSE regs : 87.27 ( 3%) usr 0.00 ( 0%) sys 87.25 ( 3%) wall
flow 2 :2150.64 (65%) usr 0.00 ( 0%) sys2150.69 (64%) wall
if-conversion 2 : 10.33 ( 0%) usr 0.00 ( 0%) sys 10.31 ( 0%) wall
scheduling 2 : 41.51 ( 1%) usr 0.00 ( 0%) sys 41.50 ( 1%) wall
delay branch sched : 6.23 ( 0%) usr 0.00 ( 0%) sys 6.25 ( 0%) wall
shorten branches : 0.72 ( 0%) usr 0.00 ( 0%) sys 0.75 ( 0%) wall
final : 16.81 ( 1%) usr 0.01 ( 0%) sys 16.75 ( 0%) wall
symout : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
rest of compilation : 12.87 ( 0%) usr 0.00 ( 0%) sys 12.88 ( 0%) wall
TOTAL :3328.58 30.15 3359.19
3328.68u 30.31s 56:00.70 99.9%
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls ms/call ms/call name
43.06 370.73 370.73 69535200 0.01 0.01 make_edge
12.23 476.05 105.32 internal_mcount
8.84 552.15 76.10 htab_traverse
3.80 584.88 32.73 29 1128.62 1128.62 mark_critical_edges
3.57 615.66 30.78 2474 12.44 12.44 propagate_freq
2.52 637.35 21.69 15 1446.00 1449.33 calc_idoms
2.51 658.99 21.64 258060 0.08 0.08 try_forward_edges
2.49 680.42 21.43 120405144 0.00 0.00 bitmap_operation
2.12 698.68 18.26 15 1217.33 1217.33 calc_dfs_tree_nonrec
2.08 716.57 17.89 8 2236.25 4988.53 calculate_global_regs_live
1.93 733.17 16.60 25 664.00 664.00 find_unreachable_blocks
1.88 749.38 16.21 3 5403.33 9329.03 flow_loops_find
1.29 760.50 11.12 69475595 0.00 0.00 make_label_edge
1.12 770.15 9.65 5 1930.00 1930.00 mark_dfs_back_edges
0.89 777.83 7.68 3 2560.00 15154.13 estimate_bb_frequencies
...
-----------------------------------------------
0.00 0.28 10/13720 find_basic_blocks [34]
3.87 386.48 13710/13720 find_sub_basic_blocks [10]
[8] 45.4 3.87 386.76 13720 make_edges [8]
370.69 0.00 69527073/69535200 make_edge [11]
11.12 0.00 69475595/69475595 make_label_edge [36]
3.24 0.00 13712/13730 sbitmap_vector_alloc [53]
0.05 1.56 13712/13730 sbitmap_vector_zero [71]
0.03 0.04 57675/877995 for_each_rtx <cycle 10> [77]
0.01 0.02 70795/76239 computed_jump_p [470]
0.01 0.00 107911/923704 next_nonnote_insn [400]
0.00 0.00 70795/66160938 find_reg_note [165]
0.00 0.00 57675/295634 returnjump_p [1163]
-----------------------------------------------
0.00 390.55 9/9 rest_of_compilation [7]
[9] 45.4 0.00 390.55 9 split_all_insns [9]
0.03 390.27 13707/13710 find_sub_basic_blocks [10]
0.03 0.20 387759/508164 split_insn [174]
0.01 0.00 1/34 compute_bb_for_insn [172]
0.00 0.00 9/188062848 sbitmap_zero [72]
0.00 0.00 9/2519 sbitmap_alloc [1383]
0.00 0.00 1/13762 get_max_uid [1303]
-----------------------------------------------
0.00 0.09 3/13710 commit_edge_insertions [275]
0.03 390.27 13707/13710 split_all_insns [9]
[10] 45.4 0.03 390.36 13710 find_sub_basic_blocks [10]
3.87 386.48 13710/13720 make_edges [8]
0.01 0.01 13710/27426 purge_dead_edges [458]
0.00 0.00 13156/66160938 find_reg_note [165]
-----------------------------------------------
0.04 0.00 8127/69535200 try_crossjump_to_edge [59]
370.69 0.00 69527073/69535200 make_edges [8]
[11] 43.1 370.73 0.00 69535200 make_edge [11]
-----------------------------------------------
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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2003-02-19 15:26 optimization/4121: split_all_insns performance bottleneck gerald
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2001-08-24 17:06 lucier
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