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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>
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@ -28,6 +28,8 @@
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*/
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#include <assert.h>
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#include <malloc.h>
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#include <sys/user.h> /* PAGE_SIZE */
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#include "busybox.h"
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@ -763,6 +765,24 @@ int lbb_main(char **argv)
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int main(int argc UNUSED_PARAM, char **argv)
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#endif
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{
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/* Tweak malloc for reduced memory consumption */
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#ifndef PAGE_SIZE
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# define PAGE_SIZE (4*1024) /* guess */
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#endif
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#ifdef M_TRIM_THRESHOLD
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/* M_TRIM_THRESHOLD is the maximum amount of freed top-most memory
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* to keep before releasing to the OS
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* Default is way too big: 256k
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*/
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mallopt(M_TRIM_THRESHOLD, 2 * PAGE_SIZE);
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#endif
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#ifdef M_MMAP_THRESHOLD
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/* M_MMAP_THRESHOLD is the request size threshold for using mmap()
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* Default is too big: 256k
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*/
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mallopt(M_MMAP_THRESHOLD, 8 * PAGE_SIZE - 256);
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#endif
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#if defined(SINGLE_APPLET_MAIN)
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/* Only one applet is selected by the user! */
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/* applet_names in this case is just "applet\0\0" */
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