diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-09-06 02:12:28 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-09-06 02:12:28 +0200 |
| commit | 1f7c167b23dfd5b03f386a657cb95867e1605e1b (patch) | |
| tree | 10f74bc529ecf41d5f93aa1395f179037bbaab91 /libbb | |
| parent | 6db4784d27be020d892f92db0cba70452b1c128e (diff) | |
experimentally add mallopt tweaks for reduced memory consumption
function old new delta
mallopt - 126 +126
main 91 117 +26
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 152/0) Total: 152 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/appletlib.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libbb/appletlib.c b/libbb/appletlib.c index 814b8bcd2..0ebea4f44 100644 --- a/libbb/appletlib.c +++ b/libbb/appletlib.c @@ -28,6 +28,8 @@ */ #include <assert.h> +#include <malloc.h> +#include <sys/user.h> /* PAGE_SIZE */ #include "busybox.h" @@ -763,6 +765,24 @@ int lbb_main(char **argv) int main(int argc UNUSED_PARAM, char **argv) #endif { + /* Tweak malloc for reduced memory consumption */ +#ifndef PAGE_SIZE +# define PAGE_SIZE (4*1024) /* guess */ +#endif +#ifdef M_TRIM_THRESHOLD + /* M_TRIM_THRESHOLD is the maximum amount of freed top-most memory + * to keep before releasing to the OS + * Default is way too big: 256k + */ + mallopt(M_TRIM_THRESHOLD, 2 * PAGE_SIZE); +#endif +#ifdef M_MMAP_THRESHOLD + /* M_MMAP_THRESHOLD is the request size threshold for using mmap() + * Default is too big: 256k + */ + mallopt(M_MMAP_THRESHOLD, 8 * PAGE_SIZE - 256); +#endif + #if defined(SINGLE_APPLET_MAIN) /* Only one applet is selected by the user! */ /* applet_names in this case is just "applet\0\0" */ |