diff options
Diffstat (limited to 'plugin/query_response_time/query_response_time.cc')
| -rw-r--r-- | plugin/query_response_time/query_response_time.cc | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/plugin/query_response_time/query_response_time.cc b/plugin/query_response_time/query_response_time.cc new file mode 100644 index 00000000..e344f45b --- /dev/null +++ b/plugin/query_response_time/query_response_time.cc @@ -0,0 +1,278 @@ +#include "mysql_version.h" +#include "my_global.h" +#ifdef HAVE_RESPONSE_TIME_DISTRIBUTION +#include "mysql_com.h" +#include "rpl_tblmap.h" +#include "table.h" +#include "field.h" +#include "sql_show.h" +#include "query_response_time.h" + +#define TIME_STRING_POSITIVE_POWER_LENGTH QRT_TIME_STRING_POSITIVE_POWER_LENGTH +#define TIME_STRING_NEGATIVE_POWER_LENGTH 6 +#define TOTAL_STRING_POSITIVE_POWER_LENGTH QRT_TOTAL_STRING_POSITIVE_POWER_LENGTH +#define TOTAL_STRING_NEGATIVE_POWER_LENGTH 6 +#define MINIMUM_BASE 2 +#define MAXIMUM_BASE QRT_MAXIMUM_BASE +#define POSITIVE_POWER_FILLER QRT_POSITIVE_POWER_FILLER +#define NEGATIVE_POWER_FILLER QRT_NEGATIVE_POWER_FILLER +#define TIME_OVERFLOW QRT_TIME_OVERFLOW +#define DEFAULT_BASE QRT_DEFAULT_BASE + +#define do_xstr(s) do_str(s) +#define do_str(s) #s +#define do_format(filler,width) "%" filler width "lld" +/* + Format strings for snprintf. Generate from: + POSITIVE_POWER_FILLER and TIME_STRING_POSITIVE_POWER_LENGTH + NEFATIVE_POWER_FILLER and TIME_STRING_NEGATIVE_POWER_LENGTH +*/ +#define TIME_STRING_POSITIVE_POWER_FORMAT do_format(POSITIVE_POWER_FILLER,do_xstr(TIME_STRING_POSITIVE_POWER_LENGTH)) +#define TIME_STRING_NEGATIVE_POWER_FORMAT do_format(NEGATIVE_POWER_FILLER,do_xstr(TIME_STRING_NEGATIVE_POWER_LENGTH)) +#define TIME_STRING_FORMAT TIME_STRING_POSITIVE_POWER_FORMAT "." TIME_STRING_NEGATIVE_POWER_FORMAT + +#define TOTAL_STRING_POSITIVE_POWER_FORMAT do_format(POSITIVE_POWER_FILLER,do_xstr(TOTAL_STRING_POSITIVE_POWER_LENGTH)) +#define TOTAL_STRING_NEGATIVE_POWER_FORMAT do_format(NEGATIVE_POWER_FILLER,do_xstr(TOTAL_STRING_NEGATIVE_POWER_LENGTH)) +#define TOTAL_STRING_FORMAT TOTAL_STRING_POSITIVE_POWER_FORMAT "." TOTAL_STRING_NEGATIVE_POWER_FORMAT + +#define TIME_STRING_LENGTH QRT_TIME_STRING_LENGTH +#define TIME_STRING_BUFFER_LENGTH (TIME_STRING_LENGTH + 1 /* '\0' */) + +#define TOTAL_STRING_LENGTH QRT_TOTAL_STRING_LENGTH +#define TOTAL_STRING_BUFFER_LENGTH (TOTAL_STRING_LENGTH + 1 /* '\0' */) + +/* + Calculate length of "log linear" + 1) + (MINIMUM_BASE ^ result) <= (10 ^ STRING_POWER_LENGTH) < (MINIMUM_BASE ^ (result + 1)) + + 2) + (MINIMUM_BASE ^ result) <= (10 ^ STRING_POWER_LENGTH) + and + (MINIMUM_BASE ^ (result + 1)) > (10 ^ STRING_POWER_LENGTH) + + 3) + result <= LOG(MINIMUM_BASE, 10 ^ STRING_POWER_LENGTH)= STRING_POWER_LENGTH * LOG(MINIMUM_BASE,10) + result + 1 > LOG(MINIMUM_BASE, 10 ^ STRING_POWER_LENGTH)= STRING_POWER_LENGTH * LOG(MINIMUM_BASE,10) + + 4) STRING_POWER_LENGTH * LOG(MINIMUM_BASE,10) - 1 < result <= STRING_POWER_LENGTH * LOG(MINIMUM_BASE,10) + + MINIMUM_BASE= 2 always, LOG(MINIMUM_BASE,10)= 3.3219280948873626, result= (int)3.3219280948873626 * STRING_POWER_LENGTH + + Last counter always use for time overflow +*/ +#define POSITIVE_POWER_COUNT ((int)(3.32192809 * TIME_STRING_POSITIVE_POWER_LENGTH)) +#define NEGATIVE_POWER_COUNT ((int)(3.32192809 * TIME_STRING_NEGATIVE_POWER_LENGTH)) +#define OVERALL_POWER_COUNT (NEGATIVE_POWER_COUNT + 1 + POSITIVE_POWER_COUNT) + +#define MILLION ((unsigned long)1000 * 1000) + +namespace query_response_time +{ + +class utility +{ +public: + utility() : m_base(0) + { + m_max_dec_value= MILLION; + for(int i= 0; TIME_STRING_POSITIVE_POWER_LENGTH > i; ++i) + m_max_dec_value *= 10; + setup(DEFAULT_BASE); + } +public: + uint base() const { return m_base; } + uint negative_count() const { return m_negative_count; } + uint positive_count() const { return m_positive_count; } + uint bound_count() const { return m_bound_count; } + ulonglong max_dec_value() const { return m_max_dec_value; } + ulonglong bound(uint index) const { return m_bound[ index ]; } +public: + void setup(uint base) + { + if(base != m_base) + { + m_base= base; + + const ulonglong million= 1000 * 1000; + ulonglong value= million; + m_negative_count= 0; + while(value > 0) + { + m_negative_count += 1; + value /= m_base; + } + m_negative_count -= 1; + + value= million; + m_positive_count= 0; + while(value < m_max_dec_value) + { + m_positive_count += 1; + value *= m_base; + } + m_bound_count= m_negative_count + m_positive_count; + + value= million; + for(uint i= 0; i < m_negative_count; ++i) + { + value /= m_base; + m_bound[m_negative_count - i - 1]= value; + } + value= million; + for(uint i= 0; i < m_positive_count; ++i) + { + m_bound[m_negative_count + i]= value; + value *= m_base; + } + } + } +private: + uint m_base; + uint m_negative_count; + uint m_positive_count; + uint m_bound_count; + ulonglong m_max_dec_value; /* for TIME_STRING_POSITIVE_POWER_LENGTH=7 is 10000000 */ + ulonglong m_bound[OVERALL_POWER_COUNT]; +}; + +static +void print_time(char* buffer, std::size_t buffer_size, const char* format, + uint64 value) +{ + ulonglong second= (value / MILLION); + ulonglong microsecond= (value % MILLION); + my_snprintf(buffer, buffer_size, format, second, microsecond); +} + +class time_collector +{ + utility *m_utility; + Atomic_counter<uint32_t> m_count[OVERALL_POWER_COUNT + 1]; + Atomic_counter<uint64_t> m_total[OVERALL_POWER_COUNT + 1]; + +public: + time_collector(utility& u): m_utility(&u) { flush(); } + ~time_collector() = default; + uint32_t count(uint index) { return m_count[index]; } + uint64_t total(uint index) { return m_total[index]; } + void flush() + { + for (auto i= 0; i < OVERALL_POWER_COUNT + 1; i++) + { + m_count[i]= 0; + m_total[i]= 0; + } + } + void collect(uint64_t time) + { + int i= 0; + for(int count= m_utility->bound_count(); count > i; ++i) + { + if(m_utility->bound(i) > time) + { + m_count[i]++; + m_total[i]+= time; + break; + } + } + } +}; + +class collector +{ +public: + collector() : m_time(m_utility) + { + m_utility.setup(DEFAULT_BASE); + } +public: + void flush() + { + m_utility.setup(opt_query_response_time_range_base); + m_time.flush(); + } + int fill(THD* thd, TABLE_LIST *tables, COND *cond) + { + DBUG_ENTER("fill_schema_query_response_time"); + TABLE *table= static_cast<TABLE*>(tables->table); + Field **fields= table->field; + for(uint i= 0, count= bound_count() + 1 /* with overflow */; count > i; ++i) + { + char time[TIME_STRING_BUFFER_LENGTH]; + char total[TOTAL_STRING_BUFFER_LENGTH]; + if(i == bound_count()) + { + assert(sizeof(TIME_OVERFLOW) <= TIME_STRING_BUFFER_LENGTH); + assert(sizeof(TIME_OVERFLOW) <= TOTAL_STRING_BUFFER_LENGTH); + memcpy(time,TIME_OVERFLOW,sizeof(TIME_OVERFLOW)); + memcpy(total,TIME_OVERFLOW,sizeof(TIME_OVERFLOW)); + } + else + { + print_time(time, sizeof(time), TIME_STRING_FORMAT, this->bound(i)); + print_time(total, sizeof(total), TOTAL_STRING_FORMAT, this->total(i)); + } + fields[0]->store(time,strlen(time),system_charset_info); + fields[1]->store((longlong)this->count(i),true); + fields[2]->store(total,strlen(total),system_charset_info); + if (schema_table_store_record(thd, table)) + { + DBUG_RETURN(1); + } + } + DBUG_RETURN(0); + } + void collect(ulonglong time) + { + m_time.collect(time); + } + uint bound_count() const + { + return m_utility.bound_count(); + } + ulonglong bound(uint index) + { + return m_utility.bound(index); + } + ulonglong count(uint index) + { + return m_time.count(index); + } + ulonglong total(uint index) + { + return m_time.total(index); + } +private: + utility m_utility; + time_collector m_time; +}; + +static collector g_collector; + +} // namespace query_response_time + +void query_response_time_init() +{ +} + +void query_response_time_free() +{ + query_response_time::g_collector.flush(); +} + +int query_response_time_flush() +{ + query_response_time::g_collector.flush(); + return 0; +} +void query_response_time_collect(ulonglong query_time) +{ + query_response_time::g_collector.collect(query_time); +} + +int query_response_time_fill(THD* thd, TABLE_LIST *tables, COND *cond) +{ + return query_response_time::g_collector.fill(thd,tables,cond); +} +#endif // HAVE_RESPONSE_TIME_DISTRIBUTION |