Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* Copyright (c) 2016 Facebook
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/perf_event.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <sys/resource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <bpf/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <bpf/libbpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "perf-sys.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "trace_helpers.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define SAMPLE_FREQ 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) static int pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /* counts, stackmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static int map_fd[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) struct bpf_program *prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static bool sys_read_seen, sys_write_seen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static void print_ksym(__u64 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct ksym *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (!addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	sym = ksym_search(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (!sym) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		printf("ksym not found. Is kallsyms loaded?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	printf("%s;", sym->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (!strstr(sym->name, "sys_read"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		sys_read_seen = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	else if (!strstr(sym->name, "sys_write"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		sys_write_seen = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static void print_addr(__u64 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (!addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	printf("%llx;", addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) #define TASK_COMM_LEN 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) struct key_t {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	char comm[TASK_COMM_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	__u32 kernstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	__u32 userstack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static void print_stack(struct key_t *key, __u64 count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	__u64 ip[PERF_MAX_STACK_DEPTH] = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	static bool warned;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	printf("%3lld %s;", count, key->comm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (bpf_map_lookup_elem(map_fd[1], &key->kernstack, ip) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		printf("---;");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			print_ksym(ip[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	printf("-;");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (bpf_map_lookup_elem(map_fd[1], &key->userstack, ip) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		printf("---;");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			print_addr(ip[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (count < 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		printf("\r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (key->kernstack == -EEXIST && !warned) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		printf("stackmap collisions seen. Consider increasing size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		warned = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	} else if ((int)key->kernstack < 0 && (int)key->userstack < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		printf("err stackid %d %d\n", key->kernstack, key->userstack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static void err_exit(int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	kill(pid, SIGKILL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	exit(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void print_stacks(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct key_t key = {}, next_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	__u64 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	__u32 stackid = 0, next_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	int error = 1, fd = map_fd[0], stack_map = map_fd[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	sys_read_seen = sys_write_seen = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		bpf_map_lookup_elem(fd, &next_key, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		print_stack(&next_key, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		bpf_map_delete_elem(fd, &next_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		key = next_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (!sys_read_seen || !sys_write_seen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		printf("BUG kernel stack doesn't contain sys_read() and sys_write()\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		err_exit(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	/* clear stack map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	while (bpf_map_get_next_key(stack_map, &stackid, &next_id) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		bpf_map_delete_elem(stack_map, &next_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		stackid = next_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static inline int generate_load(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (system("dd if=/dev/zero of=/dev/null count=5000k status=none") < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		printf("failed to generate some load with dd: %s\n", strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static void test_perf_event_all_cpu(struct perf_event_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	struct bpf_link **links = calloc(nr_cpus, sizeof(struct bpf_link *));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	int i, pmu_fd, error = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (!links) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		printf("malloc of links failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	/* system wide perf event, no need to inherit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	attr->inherit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	/* open perf_event on all cpus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	for (i = 0; i < nr_cpus; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		pmu_fd = sys_perf_event_open(attr, -1, i, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		if (pmu_fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			printf("sys_perf_event_open failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			goto all_cpu_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		links[i] = bpf_program__attach_perf_event(prog, pmu_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		if (libbpf_get_error(links[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			printf("bpf_program__attach_perf_event failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			links[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			close(pmu_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			goto all_cpu_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (generate_load() < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		goto all_cpu_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	print_stacks();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) all_cpu_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	for (i--; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		bpf_link__destroy(links[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	free(links);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		err_exit(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static void test_perf_event_task(struct perf_event_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	struct bpf_link *link = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	int pmu_fd, error = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	/* per task perf event, enable inherit so the "dd ..." command can be traced properly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	 * Enabling inherit will cause bpf_perf_prog_read_time helper failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	attr->inherit = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	/* open task bound event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	pmu_fd = sys_perf_event_open(attr, 0, -1, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (pmu_fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		printf("sys_perf_event_open failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	link = bpf_program__attach_perf_event(prog, pmu_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (libbpf_get_error(link)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		printf("bpf_program__attach_perf_event failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		link = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		close(pmu_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (generate_load() < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	print_stacks();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	bpf_link__destroy(link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		err_exit(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static void test_bpf_perf_event(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	struct perf_event_attr attr_type_hw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		.type = PERF_TYPE_HARDWARE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		.config = PERF_COUNT_HW_CPU_CYCLES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	struct perf_event_attr attr_type_sw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		.type = PERF_TYPE_SOFTWARE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		.config = PERF_COUNT_SW_CPU_CLOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	struct perf_event_attr attr_hw_cache_l1d = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		.type = PERF_TYPE_HW_CACHE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		.config =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			PERF_COUNT_HW_CACHE_L1D |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			(PERF_COUNT_HW_CACHE_OP_READ << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	struct perf_event_attr attr_hw_cache_branch_miss = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		.type = PERF_TYPE_HW_CACHE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		.config =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			PERF_COUNT_HW_CACHE_BPU |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			(PERF_COUNT_HW_CACHE_OP_READ << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			(PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct perf_event_attr attr_type_raw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		.type = PERF_TYPE_RAW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		/* Intel Instruction Retired */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		.config = 0xc0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	struct perf_event_attr attr_type_raw_lock_load = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		.sample_freq = SAMPLE_FREQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		.freq = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		.type = PERF_TYPE_RAW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		/* Intel MEM_UOPS_RETIRED.LOCK_LOADS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		.config = 0x21d0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		/* Request to record lock address from PEBS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		.sample_type = PERF_SAMPLE_ADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		/* Record address value requires precise event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		.precise_ip = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	printf("Test HW_CPU_CYCLES\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	test_perf_event_all_cpu(&attr_type_hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	test_perf_event_task(&attr_type_hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	printf("Test SW_CPU_CLOCK\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	test_perf_event_all_cpu(&attr_type_sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	test_perf_event_task(&attr_type_sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	printf("Test HW_CACHE_L1D\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	test_perf_event_all_cpu(&attr_hw_cache_l1d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	test_perf_event_task(&attr_hw_cache_l1d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	printf("Test HW_CACHE_BPU\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	test_perf_event_all_cpu(&attr_hw_cache_branch_miss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	test_perf_event_task(&attr_hw_cache_branch_miss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	printf("Test Instruction Retired\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	test_perf_event_all_cpu(&attr_type_raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	test_perf_event_task(&attr_type_raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	printf("Test Lock Load\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	test_perf_event_all_cpu(&attr_type_raw_lock_load);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	test_perf_event_task(&attr_type_raw_lock_load);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	printf("*** PASS ***\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	struct bpf_object *obj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	char filename[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	int error = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	setrlimit(RLIMIT_MEMLOCK, &r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	signal(SIGINT, err_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	signal(SIGTERM, err_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	if (load_kallsyms()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		printf("failed to process /proc/kallsyms\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	obj = bpf_object__open_file(filename, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	if (libbpf_get_error(obj)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		printf("opening BPF object file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		obj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	if (!prog) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		printf("finding a prog in obj file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	/* load BPF program */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (bpf_object__load(obj)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		printf("loading BPF object file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	map_fd[0] = bpf_object__find_map_fd_by_name(obj, "counts");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	map_fd[1] = bpf_object__find_map_fd_by_name(obj, "stackmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (map_fd[0] < 0 || map_fd[1] < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		printf("finding a counts/stackmap map in obj file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	pid = fork();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if (pid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		read_trace_pipe();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	} else if (pid == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		printf("couldn't spawn process\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	test_bpf_perf_event();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	bpf_object__close(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	err_exit(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }