Looks for smaps member using a gperf table instead of using
bsearch. Brings a 25% boost.
This commit is contained in:
Benoît Dejean
172
sysdeps/linux/procmap_smaps.c
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172
sysdeps/linux/procmap_smaps.c
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@@ -0,0 +1,172 @@
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/* ANSI-C code produced by gperf version 3.0.3 */
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/* Command-line: gperf sysdeps/linux/procmap_smaps.gperf */
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/* Computed positions: -k'9' */
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#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
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&& ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
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&& (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
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&& ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
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&& ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
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&& ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
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&& ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
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&& ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
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&& ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
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&& ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
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&& ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
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&& ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
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&& ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
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&& ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
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&& ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
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&& ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
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&& ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
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&& ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
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&& ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
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&& ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
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&& ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
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&& ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
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&& ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
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/* The character set is not based on ISO-646. */
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#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gnu-gperf@gnu.org>."
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#endif
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#line 8 "sysdeps/linux/procmap_smaps.gperf"
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#include "glibtop_private.h"
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#include <glibtop/procmap.h>
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#include <stddef.h>
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#define SMAP_OFFSET(MEMBER) offsetof(glibtop_map_entry, MEMBER)
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#line 14 "sysdeps/linux/procmap_smaps.gperf"
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struct smap_value { int name; ptrdiff_t offset; };
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#include <string.h>
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#define TOTAL_KEYWORDS 6
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#define MIN_WORD_LENGTH 4
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#define MAX_WORD_LENGTH 14
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#define MIN_HASH_VALUE 4
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#define MAX_HASH_VALUE 19
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/* maximum key range = 16, duplicates = 0 */
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#ifdef __GNUC__
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__inline
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#else
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#ifdef __cplusplus
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inline
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#endif
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#endif
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static unsigned int
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hash (register const char *str, register unsigned int len)
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{
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static const unsigned char asso_values[] =
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{
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 5, 0, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 5, 20, 20, 0, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
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20, 20, 20, 20, 20, 20
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};
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register int hval = len;
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switch (hval)
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{
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default:
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hval += asso_values[(unsigned char)str[8]];
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/*FALLTHROUGH*/
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case 8:
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case 7:
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case 6:
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case 5:
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case 4:
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break;
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}
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return hval;
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}
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struct stringpool_t
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{
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char stringpool_str4[sizeof("Rss:")];
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char stringpool_str5[sizeof("Size:")];
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char stringpool_str13[sizeof("Shared_Clean:")];
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char stringpool_str14[sizeof("Private_Dirty:")];
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char stringpool_str18[sizeof("Shared_Dirty:")];
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char stringpool_str19[sizeof("Private_Clean:")];
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};
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static const struct stringpool_t stringpool_contents =
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{
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"Rss:",
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"Size:",
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"Shared_Clean:",
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"Private_Dirty:",
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"Shared_Dirty:",
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"Private_Clean:"
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};
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#define stringpool ((const char *) &stringpool_contents)
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#ifdef __GNUC__
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__inline
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#ifdef __GNUC_STDC_INLINE__
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__attribute__ ((__gnu_inline__))
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#endif
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#endif
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static /* manually added */
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const struct smap_value *
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_glibtop_find_smap (register const char *str, register unsigned int len)
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{
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static const unsigned char lengthtable[] =
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{
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0, 0, 0, 0, 4, 5, 0, 0, 0, 0, 0, 0, 0, 13,
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14, 0, 0, 0, 13, 14
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};
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static const struct smap_value wordlist[] =
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{
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{-1}, {-1}, {-1}, {-1},
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#line 18 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str4, SMAP_OFFSET(rss)},
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#line 21 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str5, SMAP_OFFSET(size)},
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{-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
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#line 19 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str13, SMAP_OFFSET(shared_clean)},
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#line 17 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str14, SMAP_OFFSET(private_dirty)},
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{-1}, {-1}, {-1},
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#line 20 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str18, SMAP_OFFSET(shared_dirty)},
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#line 16 "sysdeps/linux/procmap_smaps.gperf"
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{(int)(long)&((struct stringpool_t *)0)->stringpool_str19, SMAP_OFFSET(private_clean)}
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};
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if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
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{
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register int key = hash (str, len);
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if (key <= MAX_HASH_VALUE && key >= 0)
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if (len == lengthtable[key])
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{
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register const char *s = wordlist[key].name + stringpool;
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if (*str == *s && !memcmp (str + 1, s + 1, len - 1))
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return &wordlist[key];
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}
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}
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return 0;
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}
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