Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * @file oprofile_stats.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * @remark Copyright 2002 OProfile authors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * @remark Read the file COPYING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * @author John Levon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/oprofile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/cpumask.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "oprofile_stats.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "cpu_buffer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct oprofile_stat_struct oprofile_stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) void oprofile_reset_stats(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	struct oprofile_cpu_buffer *cpu_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		cpu_buf = &per_cpu(op_cpu_buffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		cpu_buf->sample_received = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		cpu_buf->sample_lost_overflow = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		cpu_buf->backtrace_aborted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		cpu_buf->sample_invalid_eip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	atomic_set(&oprofile_stats.event_lost_overflow, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	atomic_set(&oprofile_stats.multiplex_counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void oprofile_create_stats_files(struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	struct oprofile_cpu_buffer *cpu_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	struct dentry *cpudir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	struct dentry *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	char buf[10];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	dir = oprofilefs_mkdir(root, "stats");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	if (!dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		cpu_buf = &per_cpu(op_cpu_buffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		snprintf(buf, 10, "cpu%d", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		cpudir = oprofilefs_mkdir(dir, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		/* Strictly speaking access to these ulongs is racy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		 * but we can't simply lock them, and they are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		 * informational only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		oprofilefs_create_ro_ulong(cpudir, "sample_received",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			&cpu_buf->sample_received);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 			&cpu_buf->sample_lost_overflow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			&cpu_buf->backtrace_aborted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 			&cpu_buf->sample_invalid_eip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		&oprofile_stats.sample_lost_no_mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 		&oprofile_stats.sample_lost_no_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	oprofilefs_create_ro_atomic(dir, "event_lost_overflow",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		&oprofile_stats.event_lost_overflow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		&oprofile_stats.bt_lost_no_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	oprofilefs_create_ro_atomic(dir, "multiplex_counter",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 		&oprofile_stats.multiplex_counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }