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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 | #include <linux/config.h> /* for CONFIG_NET_PROFILE */ #ifndef _NET_PROFILE_H_ #define _NET_PROFILE_H_ 1 #ifdef CONFIG_NET_PROFILE #include <linux/types.h> #include <linux/time.h> #include <linux/kernel.h> #include <asm/system.h> struct net_profile_slot { char id[16]; struct net_profile_slot *next; struct timeval entered; struct timeval accumulator; struct timeval irq; int hits; int active; int underflow; }; extern atomic_t net_profile_active; extern struct timeval net_profile_adjust; extern void net_profile_irq_adjust(struct timeval *entered, struct timeval* leaved); #if CPU == 586 || CPU == 686 extern __inline__ void net_profile_stamp(struct timeval *pstamp) { __asm__ __volatile__ (".byte 0x0f,0x31" :"=a" (pstamp->tv_usec), "=d" (pstamp->tv_sec)); } extern __inline__ void net_profile_accumulate(struct timeval *entered, struct timeval *leaved, struct timeval *acc) { __asm__ __volatile__ ("subl %2,%0\n\t" "sbbl %3,%1\n\t" "addl %4,%0\n\t" "adcl %5,%1\n\t" "subl " SYMBOL_NAME_STR(net_profile_adjust) "+4,%0\n\t" "sbbl $0,%1\n\t" : "=r" (acc->tv_usec), "=r" (acc->tv_sec) : "g" (entered->tv_usec), "g" (entered->tv_sec), "g" (leaved->tv_usec), "g" (leaved->tv_sec), "0" (acc->tv_usec), "1" (acc->tv_sec)); } extern __inline__ void net_profile_sub(struct timeval *sub, struct timeval *acc) { __asm__ __volatile__ ("subl %2,%0\n\t" "sbbl %3,%1\n\t" : "=r" (acc->tv_usec), "=r" (acc->tv_sec) : "g" (sub->tv_usec), "g" (sub->tv_sec), "0" (acc->tv_usec), "1" (acc->tv_sec)); } extern __inline__ void net_profile_add(struct timeval *add, struct timeval *acc) { __asm__ __volatile__ ("addl %2,%0\n\t" "adcl %3,%1\n\t" : "=r" (acc->tv_usec), "=r" (acc->tv_sec) : "g" (add->tv_usec), "g" (add->tv_sec), "0" (acc->tv_usec), "1" (acc->tv_sec)); } #elif defined (__alpha__) extern __u32 alpha_lo; extern long alpha_hi; /* On alpha cycle counter has only 32 bits :-( :-( */ extern __inline__ void net_profile_stamp(struct timeval *pstamp) { __u32 result; __asm__ __volatile__ ("rpcc %0" : "r="(result)); if (result <= alpha_lo) alpha_hi++; alpha_lo = result; pstamp->tv_sec = alpha_hi; pstamp->tv_usec = alpha_lo; } extern __inline__ void net_profile_accumulate(struct timeval *entered, struct timeval *leaved, struct timeval *acc) { time_t usecs = acc->tv_usec + leaved->tv_usec - entered->tv_usec - net_profile_adjust.tv_usec; time_t secs = acc->tv_sec + leaved->tv_sec - entered->tv_sec; if (usecs >= 0x100000000L) { usecs -= 0x100000000L; secs++; } else if (usecs < -0x100000000L) { usecs += 0x200000000L; secs -= 2; } else if (usecs < 0) { usecs += 0x100000000L; secs--; } acc->tv_sec = secs; acc->tv_usec = usecs; } extern __inline__ void net_profile_sub(struct timeval *entered, struct timeval *leaved) { time_t usecs = leaved->tv_usec - entered->tv_usec; time_t secs = leaved->tv_sec - entered->tv_sec; if (usecs < 0) { usecs += 0x100000000L; secs--; } leaved->tv_sec = secs; leaved->tv_usec = usecs; } extern __inline__ void net_profile_add(struct timeval *entered, struct timeval *leaved) { time_t usecs = leaved->tv_usec + entered->tv_usec; time_t secs = leaved->tv_sec + entered->tv_sec; if (usecs >= 0x100000000L) { usecs -= 0x100000000L; secs++; } leaved->tv_sec = secs; leaved->tv_usec = usecs; } #else extern __inline__ void net_profile_stamp(struct timeval *pstamp) { /* Not "fast" counterpart! On architectures without cpu clock "fast" routine is absolutely useless in this situation. do_gettimeofday still says something on slow-slow-slow boxes, though it eats more cpu time than the sobject of investigation :-) :-) */ do_gettimeofday(pstamp); } extern __inline__ void net_profile_accumulate(struct timeval *entered, struct timeval *leaved, struct timeval *acc) { time_t usecs = acc->tv_usec + leaved->tv_usec - entered->tv_usec - net_profile_adjust.tv_usec; time_t secs = acc->tv_sec + leaved->tv_sec - entered->tv_sec; if (usecs >= 1000000) { usecs -= 1000000; secs++; } else if (usecs < -1000000) { usecs += 2000000; secs -= 2; } else if (usecs < 0) { usecs += 1000000; secs--; } acc->tv_sec = secs; acc->tv_usec = usecs; } extern __inline__ void net_profile_sub(struct timeval *entered, struct timeval *leaved) { time_t usecs = leaved->tv_usec - entered->tv_usec; time_t secs = leaved->tv_sec - entered->tv_sec; if (usecs < 0) { usecs += 1000000; secs--; } leaved->tv_sec = secs; leaved->tv_usec = usecs; } extern __inline__ void net_profile_add(struct timeval *entered, struct timeval *leaved) { time_t usecs = leaved->tv_usec + entered->tv_usec; time_t secs = leaved->tv_sec + entered->tv_sec; if (usecs >= 1000000) { usecs -= 1000000; secs++; } leaved->tv_sec = secs; leaved->tv_usec = usecs; } #endif extern __inline__ void net_profile_enter(struct net_profile_slot *s) { unsigned long flags; save_flags(flags); cli(); if (s->active++ == 0) { net_profile_stamp(&s->entered); atomic_inc(&net_profile_active); } restore_flags(flags); } extern __inline__ void net_profile_leave_irq(struct net_profile_slot *s) { unsigned long flags; save_flags(flags); cli(); if (--s->active <= 0) { if (s->active == 0) { struct timeval curr_pstamp; net_profile_stamp(&curr_pstamp); net_profile_accumulate(&s->entered, &curr_pstamp, &s->accumulator); if (!atomic_dec_and_test(&net_profile_active)) net_profile_irq_adjust(&s->entered, &curr_pstamp); } else { s->underflow++; } } s->hits++; restore_flags(flags); } extern __inline__ void net_profile_leave(struct net_profile_slot *s) { unsigned long flags; save_flags(flags); cli(); if (--s->active <= 0) { if (s->active == 0) { struct timeval curr_pstamp; net_profile_stamp(&curr_pstamp); net_profile_accumulate(&s->entered, &curr_pstamp, &s->accumulator); atomic_dec(&net_profile_active); } else { s->underflow++; } } s->hits++; restore_flags(flags); } #define NET_PROFILE_ENTER(slot) net_profile_enter(&net_prof_##slot) #define NET_PROFILE_LEAVE(slot) net_profile_leave(&net_prof_##slot) #define NET_PROFILE_LEAVE_IRQ(slot) net_profile_leave_irq(&net_prof_##slot) #define NET_PROFILE_SKB_CLEAR(skb) ({ \ skb->pstamp.tv_usec = 0; \ }) #define NET_PROFILE_SKB_INIT(skb) ({ \ net_profile_stamp(&skb->pstamp); \ }) #define NET_PROFILE_SKB_PASSED(skb, slot) ({ \ if (skb->pstamp.tv_usec) { \ struct timeval cur_pstamp = skb->pstamp; \ net_profile_stamp(&skb->pstamp); \ net_profile_accumulate(&cur_pstamp, &skb->pstamp, &net_prof_##slot.accumulator); \ net_prof_##slot.hits++; \ }}) #define NET_PROFILE_DECL(slot) \ extern struct net_profile_slot net_prof_##slot; #define NET_PROFILE_DEFINE(slot) \ struct net_profile_slot net_prof_##slot = { #slot, }; #define NET_PROFILE_REGISTER(slot) net_profile_register(&net_prof_##slot) #define NET_PROFILE_UNREGISTER(slot) net_profile_unregister(&net_prof_##slot) extern int net_profile_init(void); extern int net_profile_register(struct net_profile_slot *); extern int net_profile_unregister(struct net_profile_slot *); #else #define NET_PROFILE_ENTER(slot) do { /* nothing */ } while(0) #define NET_PROFILE_LEAVE(slot) do { /* nothing */ } while(0) #define NET_PROFILE_LEAVE_IRQ(slot) do { /* nothing */ } while(0) #define NET_PROFILE_SKB_CLEAR(skb) do { /* nothing */ } while(0) #define NET_PROFILE_SKB_INIT(skb) do { /* nothing */ } while(0) #define NET_PROFILE_SKB_PASSED(skb, slot) do { /* nothing */ } while(0) #define NET_PROFILE_DECL(slot) #define NET_PROFILE_DEFINE(slot) #define NET_PROFILE_REGISTER(slot) do { /* nothing */ } while(0) #define NET_PROFILE_UNREGISTER(slot) do { /* nothing */ } while(0) #endif #endif |