FreeBSD/Linux Kernel Cross Reference
sys/mips/rmi/perfmon.h

     /*-
      * Copyright (c) 2003-2009 RMI Corporation
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of RMI Corporation, nor the names of its contributors,
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * RMI_BSD */
    
    #ifndef PERFMON_H
    #define PERFMON_H
    
    #include <mips/rmi/perfmon_xlrconfig.h>
    
    /*
     * category events reported by the perfmon library
     */
    enum event_category_t {
            PERF_CP0_COUNTER = 1, PERF_CP2_CREDITS, PERF_L2_COUNTER,
            PERF_SBC_COUNTER, PERF_SBC_CREDITS, PERF_GMAC0_COUNTER, PERF_GMAC1_COUNTER,
            PERF_GMAC2_COUNTER, PERF_GMAC_STAT_COM, PERF_GMAC_STAT_TX,
    PERF_GMAC_STAT_RX, PERF_DRAM_COUNTER, PERF_PARAMETER_CONF = 127};
    
    
    enum perf_param_t {
            PERF_CPU_SAMPLING_INTERVAL, PERF_SYS_SAMPLING_INTERVAL, PERF_CC_SAMPLE_RATE, PERF_CP0_FLAGS
    };
    
    #define CPO_EVENTS_TEMPLATE  0x06       /* enable kernel and user events */
    
    #define PERFMON_ACTIVE_MAGIC 0xc001
    #define PERFMON_ENABLED_MAGIC 0xb007
    #define PERFMON_INITIAL_GENERATION 0x0101
    
    #define PERFMON_SERVER_PORT 7007
    
    enum system_bridge_credits_t {
            PCIX_CREDITS, HT_CREDITS, GIO_CREDITS, OTHER_CREDITS
    };
    
    struct perf_config_data {
            uint16_t magic;         /* monitor start when this is initialized */
            uint16_t generation;    /* incremented when the config changes */
            uint16_t flags;
            uint16_t cc_sample_rate;/* rate at which credit counters are sampled
                                     * relative to sampling_rate */
            uint32_t sampling_rate; /* rate at which events are sampled */
            uint32_t cc_register_mask;      /* credit counters registers to be
                                             * sampled */
            uint64_t events[NTHREADS];      /* events bitmap for each thread */
    };
    
    struct perf_sample {
            uint32_t counter;
            uint32_t timestamp;
            uint32_t sample_tag;
            uint32_t duration;
    };
    
    struct sample_q {
            int32_t head, tail;
            struct perf_sample samples[PERF_SAMPLE_BUFSZ];
            uint32_t overflows;
    };
    
    struct perf_area {
            struct perf_config_data perf_config;
            struct sample_q sample_fifo;
    };
    
    /*
     * We have a shared location to keep a global tick counter for all the
     * CPUS  - TODO is this optimal? effect on cache?
     */
    extern uint32_t *xlr_perfmon_timer_loc;
    
    #define PERFMON_TIMESTAMP_LOC (xlr_perfmon_timer_loc)
    
   static __inline__ uint32_t 
   perfmon_timestamp_get(void)
   {
           return *PERFMON_TIMESTAMP_LOC;
   }
   
   static __inline__ void 
   perfmon_timestamp_set(uint32_t val)
   {
           *PERFMON_TIMESTAMP_LOC = val;
   }
   
   static __inline__ void 
   perfmon_timestamp_incr(int val)
   {
           (*PERFMON_TIMESTAMP_LOC) += val;
   }
   
   static __inline__ void 
   send_sample_gts(uint32_t tag, uint32_t value, uint32_t td)
   {
           xlr_send_sample(tag, value, perfmon_timestamp_get(), td);
   }
   
   /*
    * Simple FIFO, one producer - one consumer - circlar queue - no locking
    */
   
   static __inline__ void 
   init_fifo(struct sample_q *q)
   {
           q->head = q->tail = 0;
   }
   
   static __inline__ void 
   put_sample(struct sample_q *q, uint32_t sample_tag, uint32_t counter,
       uint32_t duration)
   {
           uint32_t timestamp = perfmon_timestamp_get();
           int new_tail = (q->tail + 1) % PERF_SAMPLE_BUFSZ;
   
           if (q->head == new_tail) {
                   q->overflows++;
                   return;
           }
           q->samples[new_tail].sample_tag = sample_tag;
           q->samples[new_tail].counter = counter;
           q->samples[new_tail].timestamp = timestamp;
           q->samples[new_tail].duration = duration;
   
           q->tail = new_tail;
   }
   
   static __inline__ int 
   get_sample(struct sample_q *q, uint32_t * sample_tag, uint32_t * counter,
       uint32_t * timestamp, uint32_t * duration)
   {
           int head = q->head;
   
           if (head == q->tail)
                   return 0;
           *sample_tag = q->samples[head].sample_tag;
           *counter = q->samples[head].counter;
           *timestamp = q->samples[head].timestamp;
           *duration = q->samples[head].duration;
   
           q->head = (head + 1) % PERF_SAMPLE_BUFSZ;
           return 1;
   }
   
   static __inline__ void 
   clear_queue(struct sample_q *q)
   {
           q->head = q->tail;
   }
   void xlr_perfmon_init_cpu(void *);
   void xlr_perfmon_sampler(void *);
   void log_active_core(int core);
   int get_start_generation(void);
   
   void xlr_perfmon_clockhandler(void);
   extern int xlr_perfmon_started;
   
   #endif                          /* PERFMON_H */

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