diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2020-03-16 15:47:27 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-04-22 10:53:50 +0200 |
| commit | 87ecb582f0ac85886398dde8c3cdb2225cac7786 (patch) | |
| tree | ab4033654e1b581111ea8fc297d3d09c2d6c2f2e /tools/objtool | |
| parent | objtool: Optimize !vmlinux.o again (diff) | |
| download | linux-87ecb582f0ac85886398dde8c3cdb2225cac7786.tar.xz linux-87ecb582f0ac85886398dde8c3cdb2225cac7786.zip | |
objtool: Use sec_offset_hash() for insn_hash
In preparation for find_insn_containing(), change insn_hash to use
sec_offset_hash().
This actually reduces runtime; probably because mixing in the section
index reduces the collisions due to text sections all starting their
instructions at offset 0.
Runtime on vmlinux.o from 3.1 to 2.5 seconds.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200416115119.227240432@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 87e528c2840c..923652ba5f9a 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -34,9 +34,10 @@ struct instruction *find_insn(struct objtool_file *file, { struct instruction *insn; - hash_for_each_possible(file->insn_hash, insn, hash, offset) + hash_for_each_possible(file->insn_hash, insn, hash, sec_offset_hash(sec, offset)) { if (insn->sec == sec && insn->offset == offset) return insn; + } return NULL; } @@ -282,7 +283,7 @@ static int decode_instructions(struct objtool_file *file) if (ret) goto err; - hash_add(file->insn_hash, &insn->hash, insn->offset); + hash_add(file->insn_hash, &insn->hash, sec_offset_hash(sec, insn->offset)); list_add_tail(&insn->list, &file->insn_list); nr_insns++; } |