home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Sprite 1984 - 1993
/
Sprite 1984 - 1993.iso
/
src
/
lib
/
c
/
crt
/
ds3100.md
/
gmon.h
< prev
next >
Wrap
C/C++ Source or Header
|
1990-11-05
|
2KB
|
87 lines
/* @(#)gmon.h 1.1 86/02/03 SMI */
struct phdr {
char *lpc;
char *hpc;
int ncnt;
};
/*
* histogram counters are unsigned shorts (according to the kernel).
*/
#define HISTCOUNTER unsigned short
/*
* fraction of text space to allocate for histogram counters
* here, 1/2
*/
#define HISTFRACTION 2
/*
* Fraction of text space to allocate for from hash buckets.
* The value of HASHFRACTION is based on the minimum number of bytes
* of separation between two subroutine call points in the object code.
* Given MIN_SUBR_SEPARATION bytes of separation the value of
* HASHFRACTION is calculated as:
*
* HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
*
* For the VAX, the shortest two call sequence is:
*
* calls $0,(r0)
* calls $0,(r0)
*
* which is separated by only three bytes, thus HASHFRACTION is
* calculated as:
*
* HASHFRACTION = 3 / (2 * 2 - 1) = 1
*
* Note that the division above rounds down, thus if MIN_SUBR_FRACTION
* is less than three, this algorithm will not work!
*
* On a SUN, the shortest two-call sequence is:
*
* jsr a0@
* jsr a0@
*
* which is separated by only two bytes! My interpretation of the
* correct value for HASHFRACTION is:
*
* HASHFRACTION = floor( MIN_SUBR_SEPARATION / sizeof(short) )
* or
* HASHFRACTION = 2 div 2
* so I get the same results by different means!
*/
#define HASHFRACTION 1
/*
* percent of text space to allocate for tostructs
* with a minimum.
*/
#define ARCDENSITY 2
#define MINARCS 50
struct tostruct {
char *selfpc;
long count;
unsigned short link;
};
/*
* a raw arc,
* with pointers to the calling site and the called site
* and a count.
*/
struct rawarc {
unsigned long raw_frompc;
unsigned long raw_selfpc;
long raw_count;
};
/*
* general rounding functions.
*/
#define ROUNDDOWN(x,y) (((x)/(y))*(y))
#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))