diff options
Diffstat (limited to 'storage/xtradb/sync/sync0arr.c')
| -rw-r--r-- | storage/xtradb/sync/sync0arr.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/storage/xtradb/sync/sync0arr.c b/storage/xtradb/sync/sync0arr.c index 57a288089c7..4e788b4a968 100644 --- a/storage/xtradb/sync/sync0arr.c +++ b/storage/xtradb/sync/sync0arr.c @@ -913,8 +913,10 @@ Prints warnings of long semaphore waits to stderr. @return TRUE if fatal semaphore wait threshold was exceeded */ UNIV_INTERN ibool -sync_array_print_long_waits(void) -/*=============================*/ +sync_array_print_long_waits( +/*========================*/ + os_thread_id_t* waiter, /*!< out: longest waiting thread */ + const void** sema) /*!< out: longest-waited-for semaphore */ { sync_cell_t* cell; ibool old_val; @@ -922,24 +924,40 @@ sync_array_print_long_waits(void) ulint i; ulint fatal_timeout = srv_fatal_semaphore_wait_threshold; ibool fatal = FALSE; + double longest_diff = 0; for (i = 0; i < sync_primary_wait_array->n_cells; i++) { + double diff; + void* wait_object; + cell = sync_array_get_nth_cell(sync_primary_wait_array, i); - if (cell->wait_object != NULL && cell->waiting - && difftime(time(NULL), cell->reservation_time) > 240) { + wait_object = cell->wait_object; + + if (wait_object == NULL || !cell->waiting) { + + continue; + } + + diff = difftime(time(NULL), cell->reservation_time); + + if (diff > 240) { fputs("InnoDB: Warning: a long semaphore wait:\n", stderr); sync_array_cell_print(stderr, cell); noticed = TRUE; } - if (cell->wait_object != NULL && cell->waiting - && difftime(time(NULL), cell->reservation_time) - > fatal_timeout) { + if (diff > fatal_timeout) { fatal = TRUE; } + + if (diff > longest_diff) { + longest_diff = diff; + *sema = wait_object; + *waiter = cell->thread; + } } if (noticed) { |