projects / packages / djbdns.git / blame
| Commit | Line | Data |
|---|---|---|
| a453401c MW |
1 | # |
| 2 | # This patch to djbdns 1.05 modifies the dnscache program to keep a | |
| 3 | # counter of cache hits and cache misses. | |
| 4 | # | |
| 5 | # Two new fields are added to the ``stats'' output line: | |
| 6 | # . the fifth number is the number of cache hits | |
| 7 | # . the sixth number is the number of cache misses | |
| 8 | # e.g. | |
| 9 | # @400000003fa92ccc317d70f4 stats 3 1201 1 0 21 49 | |
| 10 | # indicates 21 hits and 49 misses. | |
| 11 | # | |
| 12 | # James Raftery <james@now.ie> 6 Nov. 2003 | |
| 13 | # | |
| 14 | --- djbdns-1.05.orig/cache.c Sun Feb 11 21:11:45 2001 | |
| 15 | +++ djbdns-1.05/cache.c Wed Nov 5 17:21:06 2003 | |
| 16 | @@ -7,6 +7,11 @@ | |
| 17 | ||
| 18 | uint64 cache_motion = 0; | |
| 19 | ||
| 20 | +/* record cache stats */ | |
| 21 | +/* James Raftery <james@now.ie> 6 Nov. 2003 */ | |
| 22 | +uint64 cache_hit = 0; | |
| 23 | +uint64 cache_miss = 0; | |
| 24 | + | |
| 25 | static char *x = 0; | |
| 26 | static uint32 size; | |
| 27 | static uint32 hsize; | |
| 28 | @@ -112,15 +117,20 @@ | |
| 29 | if (u > size - pos - 20 - keylen) cache_impossible(); | |
| 30 | *datalen = u; | |
| 31 | ||
| 32 | + cache_hit++; | |
| 33 | return x + pos + 20 + keylen; | |
| 34 | } | |
| 35 | } | |
| 36 | nextpos = prevpos ^ get4(pos); | |
| 37 | prevpos = pos; | |
| 38 | pos = nextpos; | |
| 39 | - if (++loop > 100) return 0; /* to protect against hash flooding */ | |
| 40 | + if (++loop > 100) { /* to protect against hash flooding */ | |
| 41 | + cache_miss++; | |
| 42 | + return 0; | |
| 43 | + } | |
| 44 | } | |
| 45 | ||
| 46 | + cache_miss++; | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | --- djbdns-1.05.orig/cache.h Sun Feb 11 21:11:45 2001 | |
| 51 | +++ djbdns-1.05/cache.h Wed Nov 5 17:13:36 2003 | |
| 52 | @@ -5,6 +5,12 @@ | |
| 53 | #include "uint64.h" | |
| 54 | ||
| 55 | extern uint64 cache_motion; | |
| 56 | + | |
| 57 | +/* record cache stats */ | |
| 58 | +/* James Raftery <james@now.ie> 6 Nov. 2003 */ | |
| 59 | +extern uint64 cache_hit; | |
| 60 | +extern uint64 cache_miss; | |
| 61 | + | |
| 62 | extern int cache_init(unsigned int); | |
| 63 | extern void cache_set(const char *,unsigned int,const char *,unsigned int,uint32); | |
| 64 | extern char *cache_get(const char *,unsigned int,unsigned int *,uint32 *); | |
| 65 | --- djbdns-1.05.orig/log.c Sun Feb 11 21:11:45 2001 | |
| 66 | +++ djbdns-1.05/log.c Wed Nov 5 17:21:12 2003 | |
| 67 | @@ -276,6 +276,12 @@ | |
| 68 | { | |
| 69 | extern uint64 numqueries; | |
| 70 | extern uint64 cache_motion; | |
| 71 | + | |
| 72 | + /* record cache stats */ | |
| 73 | + /* James Raftery <james@now.ie> 6 Nov. 2003 */ | |
| 74 | + extern uint64 cache_hit; | |
| 75 | + extern uint64 cache_miss; | |
| 76 | + | |
| 77 | extern int uactive; | |
| 78 | extern int tactive; | |
| 79 | ||
| 80 | @@ -283,6 +289,8 @@ | |
| 81 | number(numqueries); space(); | |
| 82 | number(cache_motion); space(); | |
| 83 | number(uactive); space(); | |
| 84 | - number(tactive); | |
| 85 | + number(tactive); space(); | |
| 86 | + number(cache_hit); space(); | |
| 87 | + number(cache_miss); | |
| 88 | line(); | |
| 89 | } |