btop(9F) manual page
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btop - convert size in bytes to size in pages (round down)
#include <sys/ddi.h>
unsigned long btop(unsigned long numbytes);
Architecture
independent level 1 (DDI/DKI).
- numbytes
- Number of bytes.
btop() returns the number of memory pages that are contained in the specified
number of bytes, with downward rounding in the case that the byte count
is not a page multiple. For example, if the page size is 2048, then btop(4096)
returns 2, and btop(4097) returns 2 as well. btop(0) returns 0.
The return value is always the number of pages. There are no invalid
input values, and therefore no error return values.
btop() can be
called from user or interrupt context.
btopr(9F)
, ddi_btop(9F)
,
ptob(9F)
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