profile.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:8k
- #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>
- #ifdef CONFIG_X86_TSC
- #include <asm/msr.h>
- #endif
- 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);
- #ifdef CONFIG_X86_TSC
- static inline void net_profile_stamp(struct timeval *pstamp)
- {
- rdtsc(pstamp->tv_usec, pstamp->tv_sec);
- }
- static inline void net_profile_accumulate(struct timeval *entered,
- struct timeval *leaved,
- struct timeval *acc)
- {
- __asm__ __volatile__ ("subl %2,%0nt"
- "sbbl %3,%1nt"
- "addl %4,%0nt"
- "adcl %5,%1nt"
- "subl " SYMBOL_NAME_STR(net_profile_adjust) "+4,%0nt"
- "sbbl $0,%1nt"
- : "=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));
- }
- static inline void net_profile_sub(struct timeval *sub,
- struct timeval *acc)
- {
- __asm__ __volatile__ ("subl %2,%0nt"
- "sbbl %3,%1nt"
- : "=r" (acc->tv_usec), "=r" (acc->tv_sec)
- : "g" (sub->tv_usec), "g" (sub->tv_sec),
- "0" (acc->tv_usec), "1" (acc->tv_sec));
- }
- static inline void net_profile_add(struct timeval *add,
- struct timeval *acc)
- {
- __asm__ __volatile__ ("addl %2,%0nt"
- "adcl %3,%1nt"
- : "=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 :-( :-( */
- static 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;
- }
- static 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;
- }
- static 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;
- }
- static 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
- static 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 subject of
- investigation :-) :-)
- */
- do_gettimeofday(pstamp);
- }
- static 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;
- }
- static 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;
- }
- static 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
- static 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);
- }
- static 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);
- }
- static 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