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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2020-12-14 18:49:23 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-12-14 18:54:30 +0100 |
| commit | c7b858ff8d2e8b2d785f74b2d319bc9c839f4faa (patch) | |
| tree | 9ad109d5999444dfb3a281678b6b63d2570a76cd /archival | |
| parent | fd3c512f88d43e6633bd3c3110cfa0bb321adaa8 (diff) | |
| download | busybox-w32-c7b858ff8d2e8b2d785f74b2d319bc9c839f4faa.tar.gz busybox-w32-c7b858ff8d2e8b2d785f74b2d319bc9c839f4faa.tar.bz2 busybox-w32-c7b858ff8d2e8b2d785f74b2d319bc9c839f4faa.zip | |
libbb: add and use infrastructure for fixed page size optimization
function old new delta
procps_scan 1121 1118 -3
getpagesize 6 - -6
rpm_main 1037 1027 -10
rpm2cpio_main 120 110 -10
ptok 38 21 -17
time_main 1282 1261 -21
mkswap_main 317 278 -39
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/6 up/down: 0/-106) Total: -106 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival')
| -rw-r--r-- | archival/rpm.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/archival/rpm.c b/archival/rpm.c index a4d850b46..af8db99a6 100644 --- a/archival/rpm.c +++ b/archival/rpm.c | |||
| @@ -83,7 +83,9 @@ struct globals { | |||
| 83 | void *map; | 83 | void *map; |
| 84 | rpm_index *mytags; | 84 | rpm_index *mytags; |
| 85 | int tagcount; | 85 | int tagcount; |
| 86 | unsigned mapsize, pagesize; | 86 | unsigned mapsize; |
| 87 | IF_VARIABLE_ARCH_PAGESIZE(unsigned pagesize;) | ||
| 88 | #define G_pagesize cached_pagesize(G.pagesize) | ||
| 87 | } FIX_ALIASING; | 89 | } FIX_ALIASING; |
| 88 | #define G (*(struct globals*)bb_common_bufsiz1) | 90 | #define G (*(struct globals*)bb_common_bufsiz1) |
| 89 | #define INIT_G() do { setup_common_bufsiz(); } while (0) | 91 | #define INIT_G() do { setup_common_bufsiz(); } while (0) |
| @@ -141,7 +143,7 @@ static int rpm_gettags(const char *filename) | |||
| 141 | G.mytags = tags; | 143 | G.mytags = tags; |
| 142 | 144 | ||
| 143 | /* Map the store */ | 145 | /* Map the store */ |
| 144 | storepos = (storepos + G.pagesize) & -(int)G.pagesize; | 146 | storepos = (storepos + G_pagesize) & -(int)G_pagesize; |
| 145 | /* remember size for munmap */ | 147 | /* remember size for munmap */ |
| 146 | G.mapsize = storepos; | 148 | G.mapsize = storepos; |
| 147 | /* some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */ | 149 | /* some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */ |
| @@ -356,7 +358,7 @@ int rpm_main(int argc, char **argv) | |||
| 356 | int opt, func = 0; | 358 | int opt, func = 0; |
| 357 | 359 | ||
| 358 | INIT_G(); | 360 | INIT_G(); |
| 359 | G.pagesize = getpagesize(); | 361 | INIT_PAGESIZE(G.pagesize); |
| 360 | 362 | ||
| 361 | while ((opt = getopt(argc, argv, "iqpldc")) != -1) { | 363 | while ((opt = getopt(argc, argv, "iqpldc")) != -1) { |
| 362 | switch (opt) { | 364 | switch (opt) { |
| @@ -523,7 +525,7 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv) | |||
| 523 | int rpm_fd; | 525 | int rpm_fd; |
| 524 | 526 | ||
| 525 | INIT_G(); | 527 | INIT_G(); |
| 526 | G.pagesize = getpagesize(); | 528 | INIT_PAGESIZE(G.pagesize); |
| 527 | 529 | ||
| 528 | rpm_fd = rpm_gettags(argv[1]); | 530 | rpm_fd = rpm_gettags(argv[1]); |
| 529 | 531 | ||