perf_counter: First part of 'perf report' conversion to C + elfutils (8fa66bdc) · Commits · e / devices / android_kernel_fairphone_FP4

Documentation/perf_counter/Makefile

+1 −5

Original line number	Diff line number	Diff line
		@@ -228,7 +228,6 @@ COMPAT_CFLAGS =
		COMPAT_OBJS =
		LIB_H =
		LIB_OBJS =
		PROGRAMS = perf-report
		SCRIPT_PERL =
		SCRIPT_SH =
		TEST_PROGRAMS =
		@@ -315,6 +314,7 @@ LIB_OBJS += util/wrapper.o

		BUILTIN_OBJS += builtin-help.o
		BUILTIN_OBJS += builtin-record.o
		BUILTIN_OBJS += builtin-report.o
		BUILTIN_OBJS += builtin-stat.o
		BUILTIN_OBJS += builtin-top.o

		@@ -811,10 +811,6 @@ clean:
		$(RM) $(htmldocs).tar.gz $(manpages).tar.gz
		$(RM) PERF-VERSION-FILE PERF-CFLAGS PERF-BUILD-OPTIONS

		# temporary hack:
		perf-report: perf-report.cc ../../include/linux/perf_counter.h Makefile
		g++ -g -O2 -Wall -lrt -o $@ $<

		.PHONY: all install clean strip
		.PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell
		.PHONY: .FORCE-PERF-VERSION-FILE TAGS tags cscope .FORCE-PERF-CFLAGS

Documentation/perf_counter/builtin-report.c

0 → 100644

+751 −0

Original line number	Diff line number	Diff line
		#define _GNU_SOURCE
		#include <sys/types.h>
		#include <sys/stat.h>
		#include <sys/time.h>
		#include <unistd.h>
		#include <stdint.h>
		#include <stdbool.h>
		#include <stdlib.h>
		#include <string.h>
		#include <limits.h>
		#include <fcntl.h>
		#include <stdio.h>
		#include <errno.h>
		#include <ctype.h>
		#include <time.h>
		#include <getopt.h>
		#include <assert.h>
		#include <search.h>

		#include <sys/ioctl.h>
		#include <sys/poll.h>
		#include <sys/prctl.h>
		#include <sys/wait.h>
		#include <sys/mman.h>
		#include <sys/types.h>
		#include <sys/stat.h>

		#include <linux/unistd.h>
		#include <linux/types.h>

		#include "../../include/linux/perf_counter.h"
		#include "list.h"

		#define SHOW_KERNEL 1
		#define SHOW_USER 2
		#define SHOW_HV 4

		static char const *input_name = "output.perf";
		static int input;
		static int show_mask = SHOW_KERNEL \| SHOW_USER \| SHOW_HV;

		static unsigned long page_size;
		static unsigned long mmap_window = 32;

		static const char *perf_event_names[] = {
		[PERF_EVENT_MMAP] = " PERF_EVENT_MMAP",
		[PERF_EVENT_MUNMAP] = " PERF_EVENT_MUNMAP",
		[PERF_EVENT_COMM] = " PERF_EVENT_COMM",
		};

		struct ip_event {
		struct perf_event_header header;
		__u64 ip;
		__u32 pid, tid;
		};
		struct mmap_event {
		struct perf_event_header header;
		__u32 pid, tid;
		__u64 start;
		__u64 len;
		__u64 pgoff;
		char filename[PATH_MAX];
		};
		struct comm_event {
		struct perf_event_header header;
		__u32 pid,tid;
		char comm[16];
		};

		typedef union event_union {
		struct perf_event_header header;
		struct ip_event ip;
		struct mmap_event mmap;
		struct comm_event comm;
		} event_t;

		struct section {
		struct list_head node;
		uint64_t start;
		uint64_t end;
		uint64_t offset;
		char name[0];
		};

		static struct section *section__new(uint64_t start, uint64_t size,
		uint64_t offset, char *name)
		{
		struct section self = malloc(sizeof(self) + strlen(name) + 1);

		if (self != NULL) {
		self->start = start;
		self->end = start + size;
		self->offset = offset;
		strcpy(self->name, name);
		}

		return self;
		}

		static void section__delete(struct section *self)
		{
		free(self);
		}

		struct symbol {
		struct list_head node;
		uint64_t start;
		uint64_t end;
		char name[0];
		};

		static struct symbol symbol__new(uint64_t start, uint64_t len, const char name)
		{
		struct symbol self = malloc(sizeof(self) + strlen(name) + 1);

		if (self != NULL) {
		self->start = start;
		self->end = start + len;
		strcpy(self->name, name);
		}

		return self;
		}

		static void symbol__delete(struct symbol *self)
		{
		free(self);
		}

		static size_t symbol__fprintf(struct symbol self, FILE fp)
		{
		return fprintf(fp, " %lx-%lx %s\n",
		self->start, self->end, self->name);
		}

		struct dso {
		struct list_head node;
		struct list_head sections;
		struct list_head syms;
		char name[0];
		};

		static struct dso dso__new(const char name)
		{
		struct dso self = malloc(sizeof(self) + strlen(name) + 1);

		if (self != NULL) {
		strcpy(self->name, name);
		INIT_LIST_HEAD(&self->sections);
		INIT_LIST_HEAD(&self->syms);
		}

		return self;
		}

		static void dso__delete_sections(struct dso *self)
		{
		struct section pos, n;

		list_for_each_entry_safe(pos, n, &self->sections, node)
		section__delete(pos);
		}

		static void dso__delete_symbols(struct dso *self)
		{
		struct symbol pos, n;

		list_for_each_entry_safe(pos, n, &self->syms, node)
		symbol__delete(pos);
		}

		static void dso__delete(struct dso *self)
		{
		dso__delete_sections(self);
		dso__delete_symbols(self);
		free(self);
		}

		static void dso__insert_symbol(struct dso self, struct symbol sym)
		{
		list_add_tail(&sym->node, &self->syms);
		}

		static struct symbol dso__find_symbol(struct dso self, uint64_t ip)
		{
		if (self == NULL)
		return NULL;

		struct symbol *pos;

		list_for_each_entry(pos, &self->syms, node)
		if (ip >= pos->start && ip <= pos->end)
		return pos;

		return NULL;
		}

		static int dso__load(struct dso *self)
		{
		/* FIXME */
		return 0;
		}

		static size_t dso__fprintf(struct dso self, FILE fp)
		{
		struct symbol *pos;
		size_t ret = fprintf(fp, "dso: %s\n", self->name);

		list_for_each_entry(pos, &self->syms, node)
		ret += symbol__fprintf(pos, fp);

		return ret;
		}

		static LIST_HEAD(dsos);
		static struct dso *kernel_dso;

		static void dsos__add(struct dso *dso)
		{
		list_add_tail(&dso->node, &dsos);
		}

		static struct dso dsos__find(const char name)
		{
		struct dso *pos;

		list_for_each_entry(pos, &dsos, node)
		if (strcmp(pos->name, name) == 0)
		return pos;
		return NULL;
		}

		static struct dso dsos__findnew(const char name)
		{
		struct dso *dso = dsos__find(name);

		if (dso == NULL) {
		dso = dso__new(name);
		if (dso != NULL && dso__load(dso) < 0)
		goto out_delete_dso;

		dsos__add(dso);
		}

		return dso;

		out_delete_dso:
		dso__delete(dso);
		return NULL;
		}

		static void dsos__fprintf(FILE *fp)
		{
		struct dso *pos;

		list_for_each_entry(pos, &dsos, node)
		dso__fprintf(pos, fp);
		}

		static int load_kallsyms(void)
		{
		kernel_dso = dso__new("[kernel]");
		if (kernel_dso == NULL)
		return -1;

		FILE *file = fopen("/proc/kallsyms", "r");

		if (file == NULL)
		goto out_delete_dso;

		char *line = NULL;
		size_t n;

		while (!feof(file)) {
		unsigned long long start;
		char c, symbf[4096];

		if (getline(&line, &n, file) < 0)
		break;

		if (!line)
		goto out_delete_dso;

		if (sscanf(line, "%llx %c %s", &start, &c, symbf) == 3) {
		struct symbol *sym = symbol__new(start, 0x1000000, symbf);

		if (sym == NULL)
		goto out_delete_dso;

		dso__insert_symbol(kernel_dso, sym);
		}
		}

		dsos__add(kernel_dso);
		free(line);
		fclose(file);
		return 0;

		out_delete_dso:
		dso__delete(kernel_dso);
		return -1;
		}

		struct map {
		struct list_head node;
		uint64_t start;
		uint64_t end;
		uint64_t pgoff;
		struct dso *dso;
		};

		static struct map map__new(struct mmap_event event)
		{
		struct map self = malloc(sizeof(self));

		if (self != NULL) {
		self->start = event->start;
		self->end = event->start + event->len;
		self->pgoff = event->pgoff;

		self->dso = dsos__findnew(event->filename);
		if (self->dso == NULL)
		goto out_delete;
		}
		return self;
		out_delete:
		free(self);
		return NULL;
		}

		static size_t map__fprintf(struct map self, FILE fp)
		{
		return fprintf(fp, " %lx-%lx %lx %s\n",
		self->start, self->end, self->pgoff, self->dso->name);
		}

		struct symhist {
		struct list_head node;
		struct dso *dso;
		struct symbol *sym;
		uint32_t count;
		char level;
		};

		static struct symhist symhist__new(struct symbol sym, struct dso *dso,
		char level)
		{
		struct symhist self = malloc(sizeof(self));

		if (self != NULL) {
		self->sym = sym;
		self->dso = dso;
		self->level = level;
		self->count = 0;
		}

		return self;
		}

		static void symhist__delete(struct symhist *self)
		{
		free(self);
		}

		static bool symhist__equal(struct symhist self, struct symbol sym,
		struct dso *dso, char level)
		{
		return self->level == level && self->sym == sym && self->dso == dso;
		}

		static void symhist__inc(struct symhist *self)
		{
		++self->count;
		}

		static size_t symhist__fprintf(struct symhist self, FILE fp)
		{
		size_t ret = fprintf(fp, "[%c] ", self->level);

		if (self->level != '.')
		ret += fprintf(fp, "%s", self->sym->name);
		else
		ret += fprintf(fp, "%s: %s",
		self->dso ? self->dso->name : "<unknown",
		self->sym ? self->sym->name : "<unknown>");
		return ret + fprintf(fp, ": %u\n", self->count);
		}

		struct thread {
		struct list_head node;
		struct list_head maps;
		struct list_head symhists;
		pid_t pid;
		char *comm;
		};

		static struct thread *thread__new(pid_t pid)
		{
		struct thread self = malloc(sizeof(self));

		if (self != NULL) {
		self->pid = pid;
		self->comm = NULL;
		INIT_LIST_HEAD(&self->maps);
		INIT_LIST_HEAD(&self->symhists);
		}

		return self;
		}

		static void thread__insert_symhist(struct thread *self,
		struct symhist *symhist)
		{
		list_add_tail(&symhist->node, &self->symhists);
		}

		static struct symhist thread__symhists_find(struct thread self,
		struct symbol *sym,
		struct dso *dso, char level)
		{
		struct symhist *pos;

		list_for_each_entry(pos, &self->symhists, node)
		if (symhist__equal(pos, sym, dso, level))
		return pos;

		return NULL;
		}

		static int thread__symbol_incnew(struct thread self, struct symbol sym,
		struct dso *dso, char level)
		{
		struct symhist *symhist = thread__symhists_find(self, sym, dso, level);

		if (symhist == NULL) {
		symhist = symhist__new(sym, dso, level);
		if (symhist == NULL)
		goto out_error;
		thread__insert_symhist(self, symhist);
		}

		symhist__inc(symhist);
		return 0;
		out_error:
		return -ENOMEM;
		}

		static int thread__set_comm(struct thread self, const char comm)
		{
		self->comm = strdup(comm);
		return self->comm ? 0 : -ENOMEM;
		}

		static size_t thread__maps_fprintf(struct thread self, FILE fp)
		{
		struct map *pos;
		size_t ret = 0;

		list_for_each_entry(pos, &self->maps, node)
		ret += map__fprintf(pos, fp);

		return ret;
		}

		static size_t thread__fprintf(struct thread self, FILE fp)
		{
		struct symhist *pos;
		int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);

		list_for_each_entry(pos, &self->symhists, node)
		ret += symhist__fprintf(pos, fp);

		return ret;
		}

		static LIST_HEAD(threads);

		static void threads__add(struct thread *thread)
		{
		list_add_tail(&thread->node, &threads);
		}

		static struct thread *threads__find(pid_t pid)
		{
		struct thread *pos;

		list_for_each_entry(pos, &threads, node)
		if (pos->pid == pid)
		return pos;
		return NULL;
		}

		static struct thread *threads__findnew(pid_t pid)
		{
		struct thread *thread = threads__find(pid);

		if (thread == NULL) {
		thread = thread__new(pid);
		if (thread != NULL)
		threads__add(thread);
		}

		return thread;
		}

		static void thread__insert_map(struct thread self, struct map map)
		{
		list_add_tail(&map->node, &self->maps);
		}

		static struct map thread__find_map(struct thread self, uint64_t ip)
		{
		if (self == NULL)
		return NULL;

		struct map *pos;

		list_for_each_entry(pos, &self->maps, node)
		if (ip >= pos->start && ip <= pos->end)
		return pos;

		return NULL;
		}

		static void threads__fprintf(FILE *fp)
		{
		struct thread *pos;

		list_for_each_entry(pos, &threads, node)
		thread__fprintf(pos, fp);
		}

		#if 0
		static std::string resolve_user_symbol(int pid, uint64_t ip)
		{
		std::string sym = "<unknown>";

		maps_t &m = maps[pid];
		maps_t::const_iterator mi = m.upper_bound(map(ip));
		if (mi == m.end())
		return sym;

		ip -= mi->start + mi->pgoff;

		symbols_t &s = dsos[mi->dso].syms;
		symbols_t::const_iterator si = s.upper_bound(symbol(ip));

		sym = mi->dso + ": <unknown>";

		if (si == s.begin())
		return sym;
		si--;

		if (si->start <= ip && ip < si->end)
		sym = mi->dso + ": " + si->name;
		#if 0
		else if (si->start <= ip)
		sym = mi->dso + ": ?" + si->name;
		#endif

		return sym;
		}
		#endif

		static void display_help(void)
		{
		printf(
		"Usage: perf-report [<options>]\n"
		" -i file --input=<file> # input file\n"
		);

		exit(0);
		}

		static void process_options(int argc, char *argv[])
		{
		int error = 0;

		for (;;) {
		int option_index = 0;
		/** Options for getopt */
		static struct option long_options[] = {
		{"input", required_argument, NULL, 'i'},
		{"no-user", no_argument, NULL, 'u'},
		{"no-kernel", no_argument, NULL, 'k'},
		{"no-hv", no_argument, NULL, 'h'},
		{NULL, 0, NULL, 0 }
		};
		int c = getopt_long(argc, argv, "+:i:kuh",
		long_options, &option_index);
		if (c == -1)
		break;

		switch (c) {
		case 'i': input_name = strdup(optarg); break;
		case 'k': show_mask &= ~SHOW_KERNEL; break;
		case 'u': show_mask &= ~SHOW_USER; break;
		case 'h': show_mask &= ~SHOW_HV; break;
		default: error = 1; break;
		}
		}

		if (error)
		display_help();
		}

		int cmd_report(int argc, char **argv)
		{
		unsigned long offset = 0;
		unsigned long head = 0;
		struct stat stat;
		char *buf;
		event_t *event;
		int ret, rc = EXIT_FAILURE;
		unsigned long total = 0;

		page_size = getpagesize();

		process_options(argc, argv);

		input = open(input_name, O_RDONLY);
		if (input < 0) {
		perror("failed to open file");
		exit(-1);
		}

		ret = fstat(input, &stat);
		if (ret < 0) {
		perror("failed to stat file");
		exit(-1);
		}

		if (!stat.st_size) {
		fprintf(stderr, "zero-sized file, nothing to do!\n");
		exit(0);
		}

		if (load_kallsyms() < 0) {
		perror("failed to open kallsyms");
		return EXIT_FAILURE;
		}

		remap:
		buf = (char )mmap(NULL, page_size mmap_window, PROT_READ,
		MAP_SHARED, input, offset);
		if (buf == MAP_FAILED) {
		perror("failed to mmap file");
		exit(-1);
		}

		more:
		event = (event_t *)(buf + head);

		if (head + event->header.size >= page_size * mmap_window) {
		unsigned long shift = page_size * (head / page_size);
		int ret;

		ret = munmap(buf, page_size * mmap_window);
		assert(ret == 0);

		offset += shift;
		head -= shift;
		goto remap;
		}


		if (!event->header.size) {
		fprintf(stderr, "zero-sized event at file offset %ld\n", offset + head);
		fprintf(stderr, "skipping %ld bytes of events.\n", stat.st_size - offset - head);
		goto done;
		}

		head += event->header.size;

		if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
		char level;
		int show = 0;
		struct dso *dso = NULL;
		struct thread *thread = threads__findnew(event->ip.pid);

		if (thread == NULL)
		goto done;

		if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
		show = SHOW_KERNEL;
		level = 'k';
		dso = kernel_dso;
		} else if (event->header.misc & PERF_EVENT_MISC_USER) {
		show = SHOW_USER;
		level = '.';
		struct map *map = thread__find_map(thread, event->ip.ip);
		if (map != NULL)
		dso = map->dso;
		} else {
		show = SHOW_HV;
		level = 'H';
		}

		if (show & show_mask) {
		struct symbol *sym = dso__find_symbol(dso, event->ip.ip);

		if (thread__symbol_incnew(thread, sym, dso, level))
		goto done;
		}
		total++;
		} else switch (event->header.type) {
		case PERF_EVENT_MMAP: {
		struct thread *thread = threads__findnew(event->mmap.pid);
		struct map *map = map__new(&event->mmap);

		if (thread == NULL \|\| map == NULL )
		goto done;
		thread__insert_map(thread, map);
		break;
		}
		case PERF_EVENT_COMM: {
		struct thread *thread = threads__findnew(event->comm.pid);

		if (thread == NULL \|\|
		thread__set_comm(thread, event->comm.comm))
		goto done;
		break;
		}
		}

		if (offset + head < stat.st_size)
		goto more;

		rc = EXIT_SUCCESS;
		done:
		close(input);
		//dsos__fprintf(stdout);
		threads__fprintf(stdout);
		#if 0
		std::map<std::string, int>::iterator hi = hist.begin();

		while (hi != hist.end()) {
		rev_hist.insert(std::pair<int, std::string>(hi->second, hi->first));
		hist.erase(hi++);
		}

		std::multimap<int, std::string>::const_iterator ri = rev_hist.begin();

		while (ri != rev_hist.end()) {
		printf(" %5.2f %s\n", (100.0 * ri->first)/total, ri->second.c_str());
		ri++;
		}
		#endif
		return rc;
		}

Documentation/perf_counter/builtin.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@ extern int check_pager_config(const char *cmd);

		extern int cmd_help(int argc, const char *argv, const char prefix);
		extern int cmd_record(int argc, const char *argv, const char prefix);
		extern int cmd_report(int argc, const char *argv, const char prefix);
		extern int cmd_stat(int argc, const char *argv, const char prefix);
		extern int cmd_top(int argc, const char *argv, const char prefix);
		extern int cmd_version(int argc, const char *argv, const char prefix);

Documentation/perf_counter/command-list.txt

+1 −0

Original line number	Diff line number	Diff line
		# List of known perf commands.
		# command name category [deprecated] [common]
		perf-record mainporcelain common
		perf-report mainporcelain common
		perf-stat mainporcelain common
		perf-top mainporcelain common

Documentation/perf_counter/perf.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -250,6 +250,7 @@ static void handle_internal_command(int argc, const char **argv)
		static struct cmd_struct commands[] = {
		{ "help", cmd_help, 0 },
		{ "record", cmd_record, 0 },
		{ "report", cmd_report, 0 },
		{ "stat", cmd_stat, 0 },
		{ "top", cmd_top, 0 },
		{ "version", cmd_version, 0 },

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@ extern int check_pager_config(const char *cmd);

		extern int cmd_help(int argc, const char *argv, const char prefix);
		extern int cmd_record(int argc, const char *argv, const char prefix);
		extern int cmd_report(int argc, const char *argv, const char prefix);
		extern int cmd_stat(int argc, const char *argv, const char prefix);
		extern int cmd_top(int argc, const char *argv, const char prefix);
		extern int cmd_version(int argc, const char *argv, const char prefix);