/* * Author : Kavita Bala * Email : kaybee@lcs.mit.edu * Comment : Statistics gathering code. */ #include #include #include #include #include #include extern int tlb_miss_bug ; extern int tlb_miss_double ; /* double misses */ extern int tlb_miss_double_punt ; extern int tlb_miss_kernel_pt ; /* misses on kernel page table pages */ extern int tlb_miss_user_pt ; /* misses on user page table pages */ extern int tlb_miss_kernel ; /* misses on kernel pages */ extern int tlb_miss_user ; /* misses on user pages */ extern int kb_nested_l2 ; extern int kb_nested_l1k ; extern int kb_nested_user_pt ; prefetch_stats_t kb_stats; int kb_prefetch_trace_on, kb_prefetch_index; int kb_sys_trace_index, kb_server_pc_index; unsigned int kb_overhead_added; int prefetch_intercept_enabled; /* kb * The kernel call to collect statistics */ kern_return_t kb_prefetch_call (command, argument, stats) int command, argument; prefetch_stats_t *stats; { int s, kr, i, temp; s = splhigh(); kr = check_command_arguments(command, argument); if (kr == KERN_SUCCESS) switch (command) { case KB_PREFETCH_RESET: kr = kb_prefetch_reset (stats); break; case KB_PREFETCH_STATS: kr = kb_prefetch_stats (stats); break; case KB_PREFETCH_START: kr = kb_prefetch_start (); break; case KB_PREFETCH_STOP: kr = kb_prefetch_stop (); break; default: kr = KERN_INVALID_ARGUMENT; break; } splx(s); return(kr); } /* *------------------------------------------------------ * Function: check_command_arguments * Description: Makes sure an argument makes sense before proceeding. * Returns an error code. *------------------------------------------------------- */ int check_command_arguments(command, argument) int command; int argument; { if ((command < 0) || (command > MAX_COMMAND)) return(KERN_INVALID_ARGUMENT); return(KERN_SUCCESS); } /* *----------------------------------------------------------- * Function: kb_prefetch_reset * Description: Reset all data structures *----------------------------------------------------------- */ int kb_prefetch_reset(stats) prefetch_stats_t *stats; { int i, j, k, max; int kr; int old_intercept_state, old_trace_state; kr = KERN_SUCCESS; /* Make sure that simulator is disabled */ old_intercept_state = prefetch_intercept_enabled; old_trace_state = kb_prefetch_trace_on; prefetch_intercept_enabled = FALSE; kb_prefetch_trace_on = FALSE; kb_prefetch_index = 0; kb_sys_trace_index = 0; kb_server_pc_index = 0; kb_already_there = 0; kb_prefetch_l2 = 0; kb_prefetch_l1k = 0; kb_prefetch_kpt = 0; kb_overhead_added = 0; *((int *) kb_stlb_tmp_space_ptr + KB_TOTAL_TRAPS_PTR) = 0; *((int *) kb_stlb_tmp_space_ptr + KB_STLB_SERVICED_PTR) = 0; tlb_miss_double = 0; kb_nested_l2 = 0; kb_nested_l1k = 0; kb_nested_user_pt = 0; tlb_miss_kernel_pt = 0; tlb_miss_user_pt = 0; tlb_miss_user = 0; tlb_miss_kernel = 0; prefetch_intercept_enabled = old_intercept_state; kb_prefetch_trace_on = old_trace_state; return(kr); } /* *----------------------------------------------------------- * Function: kb_prefetch_start * Description: Start stats gathering *----------------------------------------------------------- */ int kb_prefetch_start() { int kr; kr = KERN_SUCCESS; kb_prefetch_reset (); /* Make sure that simulator is enabled */ prefetch_intercept_enabled = TRUE; kb_prefetch_trace_on = TRUE; kb_prefetch_index = 0; kb_sys_trace_index = 0; kb_server_pc_index = 0; return(kr); } /* *----------------------------------------------------------- * Function: kb_prefetch_stop * Description: Stop stats gathering *----------------------------------------------------------- */ int kb_prefetch_stop() { int kr; kr = KERN_SUCCESS; prefetch_intercept_enabled = FALSE; kb_prefetch_trace_on = FALSE; return(kr); } /*-------------------------------------------------------------------- Function: kb_prefetch_stats Description: Extracts and copies out to user space a bunch of useful statistics and internal state. ----------------------------------------------------------------------*/ int kb_prefetch_stats(stats) prefetch_stats_t *stats; { int kr, old_intercept_state, old_trace_state, min, max; int i; extern prefetch_stats_t kb_stats; unsigned int total, l2_time; unsigned int stlb_time; unsigned int other_time; int stlb_serviced; kr = KERN_SUCCESS; /* Then disable simulator (if it wasn't already) */ old_intercept_state = prefetch_intercept_enabled; old_trace_state = kb_prefetch_trace_on; prefetch_intercept_enabled = FALSE; kb_prefetch_trace_on = FALSE; total = *((int *) kb_stlb_tmp_space_ptr + KB_TOTAL_TRAPS_PTR); kb_stats.already_there = kb_already_there; kb_stats.prefetch_l2 = kb_prefetch_l2; kb_stats.prefetch_l1k = kb_prefetch_l1k; kb_stats.prefetch_kpt = kb_prefetch_kpt; kb_stats.basic_user_pt = tlb_miss_user_pt; kb_stats.basic_l2 = tlb_miss_double; kb_stats.basic_kpt = tlb_miss_kernel_pt; kb_stats.basic_l1k = tlb_miss_kernel; kb_stats.other = tlb_miss_user; kb_stats.tmr_min = min; stlb_serviced = *((int *) kb_stlb_tmp_space_ptr + KB_STLB_SERVICED_PTR); kb_stats.nested_l2 = kb_nested_l2; kb_stats.nested_l1k = kb_nested_l1k; kb_stats.nested_user_pt = kb_nested_user_pt; copyout (&stlb_serviced, &stats->stlb_serviced, sizeof(kb_stats.stlb_serviced)); copyout (&kb_stats.already_there, &stats->already_there, sizeof(kb_stats.already_there)); copyout (&kb_stats.nested_l2, &stats->nested_l2, sizeof(kb_stats.nested_l2)); copyout (&kb_stats.nested_user_pt, &stats->nested_user_pt, sizeof(kb_stats.nested_user_pt)); copyout (&kb_stats.nested_l1k, &stats->nested_l1k, sizeof(kb_stats.nested_l1k)); copyout (&kb_stats.prefetch_l2, &stats->prefetch_l2, sizeof(kb_stats.prefetch_l2)); copyout (&kb_stats.prefetch_l1k, &stats->prefetch_l1k, sizeof(kb_stats.prefetch_l1k)); copyout (&kb_stats.prefetch_kpt, &stats->prefetch_kpt, sizeof(kb_stats.prefetch_kpt)); copyout (&kb_stats.basic_user_pt, &stats->basic_user_pt, sizeof(kb_stats.basic_user_pt)); copyout (&kb_stats.other, &stats->other, sizeof(kb_stats.other)); copyout (&kb_stats.basic_l2, &stats->basic_l2, sizeof(kb_stats.basic_l2)); copyout (&kb_stats.basic_l1k, &stats->basic_l1k, sizeof(kb_stats.basic_l1k)); copyout (&kb_stats.basic_kpt, &stats->basic_kpt, sizeof(kb_stats.basic_kpt)); copyout (&total, &stats->tlb_traps, sizeof(stats->tlb_traps)); kb_already_there = 0; kb_prefetch_l2 = 0; kb_prefetch_l1k = 0; kb_prefetch_kpt = 0; kb_overhead_added = 0; *((int *) kb_stlb_tmp_space_ptr + KB_TOTAL_TRAPS_PTR) = 0; *((int *) kb_stlb_tmp_space_ptr + KB_STLB_SERVICED_PTR) = 0; kb_nested_l2 = 0; kb_nested_l1k = 0; kb_nested_user_pt = 0; tlb_miss_kernel_pt = 0; tlb_miss_user_pt = 0; tlb_miss_user = 0; tlb_miss_kernel = 0; tlb_miss_double = 0; /* Put back into old state */ prefetch_intercept_enabled = old_intercept_state; kb_prefetch_trace_on = old_trace_state; return(kr); }