The patch titled
Subject: scripts/bloat-o-meter: compile .NUMBER regex
has been added to the -mm tree. Its filename is
scripts-bloat-o-meter-compile-number-regex.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/scripts-bloat-o-meter-compile-number-regex.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/scripts-bloat-o-meter-compile-number-regex.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: scripts/bloat-o-meter: compile .NUMBER regex
Every often used regex is better be compiled in Python.
Speedup is about ~9.8% (whee!)
$ perf stat -r 16 taskset -c 15 ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux >/dev/null
7.091202853 seconds time elapsed ( +- 0.15% )
+re.compile
6.397564973 seconds time elapsed ( +- 0.34% )
Link: http://lkml.kernel.org/r/20161119004417.GB1200@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/bloat-o-meter | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN scripts/bloat-o-meter~scripts-bloat-o-meter-compile-number-regex scripts/bloat-o-meter
--- a/scripts/bloat-o-meter~scripts-bloat-o-meter-compile-number-regex
+++ a/scripts/bloat-o-meter
@@ -16,6 +16,8 @@ if len(sys.argv) != 3:
sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
sys.exit(-1)
+re_NUMBER = re.compile(r'\.[0-9]+')
+
def getsizes(file):
sym = {}
with os.popen("nm --size-sort " + file) as f:
@@ -28,7 +30,7 @@ def getsizes(file):
if name.startswith("compat_SyS_"): continue
if name == "linux_banner": continue
# statics and some other optimizations adds random .NUMBER
- name = re.sub(r'\.[0-9]+', '', name)
+ name = re_NUMBER.sub('', name)
sym[name] = sym.get(name, 0) + int(size, 16)
return sym
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
kbuild-simpler-generation-of-assembly-constants.patch
scripts-bloat-o-meter-dont-use-readlines.patch
scripts-bloat-o-meter-compile-number-regex.patch
proc-make-struct-pid_entry-len-unsigned.patch
proc-make-struct-struct-map_files_info-len-unsigned-int.patch
proc-just-list_del-struct-pde_opener.patch
proc-fix-type-of-struct-pde_opener-closing-field.patch
proc-kmalloc-struct-pde_opener.patch
proc-tweak-comments-about-2-stage-open-and-everything.patch
coredump-clarify-unsafe-core_pattern-warning.patch
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