source: libcfa/src/concurrency/stats.hfa @ d2afe17

#pragma once

// #define CFA_STATS_ARRAY 10000

#include <stdint.h>

enum {
        CFA_STATS_READY_Q  = 0x01,
        CFA_STATS_IO = 0x02,
};

#if defined(__CFA_NO_STATISTICS__)
        struct __stats_t;
        static inline void __init_stats( struct __stats_t * ) {}
        static inline void __tally_stats( struct __stats_t *, struct __stats_t * ) {}
        static inline void __print_stats( struct __stats_t *, int, const char *, const char *, void * ) {}
#else
        struct __stats_readyQ_pop_t {
                // number of attemps at poping something
                volatile uint64_t attempt;

                // number of successes at poping
                volatile uint64_t success;

                // number of attempts failed due to the lock being held
                volatile uint64_t elock;

                // number of attempts failed due to the queue being empty (lock held)
                volatile uint64_t eempty;

                // number of attempts failed due to the queue looking empty (lock not held)
                volatile uint64_t espec;
        };

        struct __attribute__((aligned(64))) __stats_readyQ_t {
                // Push statistic
                struct {
                        struct {
                                // number of attemps at pushing something to preferred queues
                                volatile uint64_t attempt;

                                // number of successes at pushing to preferred queues
                                volatile uint64_t success;
                        }
                        // Stats for local queue within cluster
                        local,

                        // Stats for non-local queues within cluster
                        share,

                        // Stats from outside cluster
                        extrn;
                } push;

                // Pop statistic
                struct {
                        // pop from local queue
                        __stats_readyQ_pop_t local;

                        // pop before looking at local queue
                        __stats_readyQ_pop_t help;

                        // pop from some other queue
                        __stats_readyQ_pop_t steal;

                        // pop when searching queues sequentially
                        __stats_readyQ_pop_t search;
                } pop;

                struct {
                        volatile uint64_t migration;
                        volatile uint64_t extunpark;
                        volatile  int64_t threads; // number of threads in the system, includes only local change
                } threads;
                struct {
                        volatile uint64_t halts;
                        volatile uint64_t cancels;
                        volatile uint64_t wakes;
                        volatile uint64_t exits;
                } sleep;
        };

        #if defined(CFA_HAVE_LINUX_IO_URING_H)
                struct __attribute__((aligned(64))) __stats_io_t{
                        struct {
                                volatile uint64_t fast;
                                volatile uint64_t slow;
                                volatile uint64_t fail;
                                volatile uint64_t revoke;
                                volatile uint64_t block;
                        } alloc;
                        struct {
                                volatile uint64_t fast;
                                volatile uint64_t slow;
                        } submit;
                        struct {
                                volatile uint64_t external;
                        } flush;
                        struct {
                                volatile uint64_t drain;
                                volatile uint64_t completed;
                                volatile uint64_t flush;
                                volatile uint64_t submitted;
                                struct {
                                        volatile uint64_t busy;
                                } errors;
                        } calls;
                        struct {
                                volatile uint64_t sleeps;
                        } poller;
                };
        #endif

        #if defined(CFA_STATS_ARRAY)
                struct __stats_elem_t {
                        long long int ts;
                        int64_t value;
                };
        #endif

        struct __attribute__((aligned(128))) __stats_t {
                __stats_readyQ_t ready;
                #if defined(CFA_HAVE_LINUX_IO_URING_H)
                        __stats_io_t    io;
                #endif

                #if defined(CFA_STATS_ARRAY)
                        struct {
                                __stats_elem_t * values;
                                volatile size_t cnt;
                        } array;
                #endif

        };

        void __init_stats ( struct __stats_t * );
        void __tally_stats( struct __stats_t *, struct __stats_t * );
        void __print_stats( struct __stats_t *, int, const char *, const char *, void * );
        #if defined(CFA_STATS_ARRAY)
                void __push_stat ( struct __stats_t *, int64_t value, bool external, const char * name, void * handle);
                void __flush_stat( struct __stats_t *, const char *, void * );
        #else
                static inline void __push_stat ( struct __stats_t *, int64_t, bool, const char *, void * ) {}
                static inline void __flush_stat( struct __stats_t *, const char *, void * ) {}
        #endif
#endif