perf: Add 'perf kmem' tool (ba77c9e1) · Commits · e / devices / android_kernel_fairphone_FP3

tools/perf/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -444,6 +444,7 @@ BUILTIN_OBJS += builtin-timechart.o
		BUILTIN_OBJS += builtin-top.o
		BUILTIN_OBJS += builtin-trace.o
		BUILTIN_OBJS += builtin-probe.o
		BUILTIN_OBJS += builtin-kmem.o

		PERFLIBS = $(LIB_FILE)

tools/perf/builtin-kmem.c

0 → 100644

+578 −0

Original line number	Diff line number	Diff line
		#include "builtin.h"
		#include "perf.h"

		#include "util/util.h"
		#include "util/cache.h"
		#include "util/symbol.h"
		#include "util/thread.h"
		#include "util/header.h"

		#include "util/parse-options.h"
		#include "util/trace-event.h"

		#include "util/debug.h"
		#include "util/data_map.h"

		#include <linux/rbtree.h>

		struct alloc_stat;
		typedef int (sort_fn_t)(struct alloc_stat , struct alloc_stat *);

		static char const *input_name = "perf.data";

		static struct perf_header *header;
		static u64 sample_type;

		static int alloc_flag;
		static int caller_flag;

		sort_fn_t alloc_sort_fn;
		sort_fn_t caller_sort_fn;

		static int alloc_lines = -1;
		static int caller_lines = -1;

		static char *cwd;
		static int cwdlen;

		struct alloc_stat {
		union {
		struct {
		char *name;
		u64 call_site;
		};
		u64 ptr;
		};
		u64 bytes_req;
		u64 bytes_alloc;
		u32 hit;

		struct rb_node node;
		};

		static struct rb_root root_alloc_stat;
		static struct rb_root root_alloc_sorted;
		static struct rb_root root_caller_stat;
		static struct rb_root root_caller_sorted;

		static unsigned long total_requested, total_allocated;

		struct raw_event_sample {
		u32 size;
		char data[0];
		};

		static int
		process_comm_event(event_t *event, unsigned long offset, unsigned long head)
		{
		struct thread *thread = threads__findnew(event->comm.pid);

		dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->comm.comm, event->comm.pid);

		if (thread == NULL \|\|
		thread__set_comm(thread, event->comm.comm)) {
		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
		return -1;
		}

		return 0;
		}

		static void insert_alloc_stat(unsigned long ptr,
		int bytes_req, int bytes_alloc)
		{
		struct rb_node **node = &root_alloc_stat.rb_node;
		struct rb_node *parent = NULL;
		struct alloc_stat *data = NULL;

		if (!alloc_flag)
		return;

		while (*node) {
		parent = *node;
		data = rb_entry(*node, struct alloc_stat, node);

		if (ptr > data->ptr)
		node = &(*node)->rb_right;
		else if (ptr < data->ptr)
		node = &(*node)->rb_left;
		else
		break;
		}

		if (data && data->ptr == ptr) {
		data->hit++;
		data->bytes_req += bytes_req;
		data->bytes_alloc += bytes_req;
		} else {
		data = malloc(sizeof(*data));
		data->ptr = ptr;
		data->hit = 1;
		data->bytes_req = bytes_req;
		data->bytes_alloc = bytes_alloc;

		rb_link_node(&data->node, parent, node);
		rb_insert_color(&data->node, &root_alloc_stat);
		}
		}

		static void insert_caller_stat(unsigned long call_site,
		int bytes_req, int bytes_alloc)
		{
		struct rb_node **node = &root_caller_stat.rb_node;
		struct rb_node *parent = NULL;
		struct alloc_stat *data = NULL;

		if (!caller_flag)
		return;

		while (*node) {
		parent = *node;
		data = rb_entry(*node, struct alloc_stat, node);

		if (call_site > data->call_site)
		node = &(*node)->rb_right;
		else if (call_site < data->call_site)
		node = &(*node)->rb_left;
		else
		break;
		}

		if (data && data->call_site == call_site) {
		data->hit++;
		data->bytes_req += bytes_req;
		data->bytes_alloc += bytes_req;
		} else {
		data = malloc(sizeof(*data));
		data->call_site = call_site;
		data->hit = 1;
		data->bytes_req = bytes_req;
		data->bytes_alloc = bytes_alloc;

		rb_link_node(&data->node, parent, node);
		rb_insert_color(&data->node, &root_caller_stat);
		}
		}

		static void process_alloc_event(struct raw_event_sample *raw,
		struct event *event,
		int cpu __used,
		u64 timestamp __used,
		struct thread *thread __used,
		int node __used)
		{
		unsigned long call_site;
		unsigned long ptr;
		int bytes_req;
		int bytes_alloc;

		ptr = raw_field_value(event, "ptr", raw->data);
		call_site = raw_field_value(event, "call_site", raw->data);
		bytes_req = raw_field_value(event, "bytes_req", raw->data);
		bytes_alloc = raw_field_value(event, "bytes_alloc", raw->data);

		insert_alloc_stat(ptr, bytes_req, bytes_alloc);
		insert_caller_stat(call_site, bytes_req, bytes_alloc);

		total_requested += bytes_req;
		total_allocated += bytes_alloc;
		}

		static void process_free_event(struct raw_event_sample *raw __used,
		struct event *event __used,
		int cpu __used,
		u64 timestamp __used,
		struct thread *thread __used)
		{
		}

		static void
		process_raw_event(event_t raw_event __used, void more_data,
		int cpu, u64 timestamp, struct thread *thread)
		{
		struct raw_event_sample *raw = more_data;
		struct event *event;
		int type;

		type = trace_parse_common_type(raw->data);
		event = trace_find_event(type);

		if (!strcmp(event->name, "kmalloc") \|\|
		!strcmp(event->name, "kmem_cache_alloc")) {
		process_alloc_event(raw, event, cpu, timestamp, thread, 0);
		return;
		}

		if (!strcmp(event->name, "kmalloc_node") \|\|
		!strcmp(event->name, "kmem_cache_alloc_node")) {
		process_alloc_event(raw, event, cpu, timestamp, thread, 1);
		return;
		}

		if (!strcmp(event->name, "kfree") \|\|
		!strcmp(event->name, "kmem_cache_free")) {
		process_free_event(raw, event, cpu, timestamp, thread);
		return;
		}
		}

		static int
		process_sample_event(event_t *event, unsigned long offset, unsigned long head)
		{
		u64 ip = event->ip.ip;
		u64 timestamp = -1;
		u32 cpu = -1;
		u64 period = 1;
		void *more_data = event->ip.__more_data;
		struct thread *thread = threads__findnew(event->ip.pid);

		if (sample_type & PERF_SAMPLE_TIME) {
		timestamp = (u64 )more_data;
		more_data += sizeof(u64);
		}

		if (sample_type & PERF_SAMPLE_CPU) {
		cpu = (u32 )more_data;
		more_data += sizeof(u32);
		more_data += sizeof(u32); /* reserved */
		}

		if (sample_type & PERF_SAMPLE_PERIOD) {
		period = (u64 )more_data;
		more_data += sizeof(u64);
		}

		dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->header.misc,
		event->ip.pid, event->ip.tid,
		(void *)(long)ip,
		(long long)period);

		if (thread == NULL) {
		pr_debug("problem processing %d event, skipping it.\n",
		event->header.type);
		return -1;
		}

		dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

		process_raw_event(event, more_data, cpu, timestamp, thread);

		return 0;
		}

		static int sample_type_check(u64 type)
		{
		sample_type = type;

		if (!(sample_type & PERF_SAMPLE_RAW)) {
		fprintf(stderr,
		"No trace sample to read. Did you call perf record "
		"without -R?");
		return -1;
		}

		return 0;
		}

		static struct perf_file_handler file_handler = {
		.process_sample_event = process_sample_event,
		.process_comm_event = process_comm_event,
		.sample_type_check = sample_type_check,
		};

		static int read_events(void)
		{
		register_idle_thread();
		register_perf_file_handler(&file_handler);

		return mmap_dispatch_perf_file(&header, input_name, 0, 0,
		&cwdlen, &cwd);
		}

		static double fragmentation(unsigned long n_req, unsigned long n_alloc)
		{
		if (n_alloc == 0)
		return 0.0;
		else
		return 100.0 - (100.0 * n_req / n_alloc);
		}

		static void __print_result(struct rb_root *root, int n_lines, int is_caller)
		{
		struct rb_node *next;

		printf("\n ------------------------------------------------------------------------------\n");
		if (is_caller)
		printf(" Callsite \|");
		else
		printf(" Alloc Ptr \|");
		printf(" Total_alloc/Per \| Total_req/Per \| Hit \| Fragmentation\n");
		printf(" ------------------------------------------------------------------------------\n");

		next = rb_first(root);

		while (next && n_lines--) {
		struct alloc_stat *data;

		data = rb_entry(next, struct alloc_stat, node);

		printf(" %-16p \| %8llu/%-6lu \| %8llu/%-6lu \| %6lu \| %8.3f%%\n",
		is_caller ? (void *)(unsigned long)data->call_site :
		(void *)(unsigned long)data->ptr,
		(unsigned long long)data->bytes_alloc,
		(unsigned long)data->bytes_alloc / data->hit,
		(unsigned long long)data->bytes_req,
		(unsigned long)data->bytes_req / data->hit,
		(unsigned long)data->hit,
		fragmentation(data->bytes_req, data->bytes_alloc));

		next = rb_next(next);
		}

		if (n_lines == -1)
		printf(" ... \| ... \| ... \| ... \| ... \n");

		printf(" ------------------------------------------------------------------------------\n");
		}

		static void print_summary(void)
		{
		printf("\nSUMMARY\n=======\n");
		printf("Total bytes requested: %lu\n", total_requested);
		printf("Total bytes allocated: %lu\n", total_allocated);
		printf("Total bytes wasted on internal fragmentation: %lu\n",
		total_allocated - total_requested);
		printf("Internal fragmentation: %f%%\n",
		fragmentation(total_requested, total_allocated));
		}

		static void print_result(void)
		{
		if (caller_flag)
		__print_result(&root_caller_sorted, caller_lines, 1);
		if (alloc_flag)
		__print_result(&root_alloc_sorted, alloc_lines, 0);
		print_summary();
		}

		static void sort_insert(struct rb_root root, struct alloc_stat data,
		sort_fn_t sort_fn)
		{
		struct rb_node **new = &(root->rb_node);
		struct rb_node *parent = NULL;

		while (*new) {
		struct alloc_stat *this;
		int cmp;

		this = rb_entry(*new, struct alloc_stat, node);
		parent = *new;

		cmp = sort_fn(data, this);

		if (cmp > 0)
		new = &((*new)->rb_left);
		else
		new = &((*new)->rb_right);
		}

		rb_link_node(&data->node, parent, new);
		rb_insert_color(&data->node, root);
		}

		static void __sort_result(struct rb_root root, struct rb_root root_sorted,
		sort_fn_t sort_fn)
		{
		struct rb_node *node;
		struct alloc_stat *data;

		for (;;) {
		node = rb_first(root);
		if (!node)
		break;

		rb_erase(node, root);
		data = rb_entry(node, struct alloc_stat, node);
		sort_insert(root_sorted, data, sort_fn);
		}
		}

		static void sort_result(void)
		{
		__sort_result(&root_alloc_stat, &root_alloc_sorted, alloc_sort_fn);
		__sort_result(&root_caller_stat, &root_caller_sorted, caller_sort_fn);
		}

		static int __cmd_kmem(void)
		{
		setup_pager();
		read_events();
		sort_result();
		print_result();

		return 0;
		}

		static const char * const kmem_usage[] = {
		"perf kmem [<options>] {record}",
		NULL
		};


		static int ptr_cmp(struct alloc_stat l, struct alloc_stat r)
		{
		if (l->ptr < r->ptr)
		return -1;
		else if (l->ptr > r->ptr)
		return 1;
		return 0;
		}

		static int callsite_cmp(struct alloc_stat l, struct alloc_stat r)
		{
		if (l->call_site < r->call_site)
		return -1;
		else if (l->call_site > r->call_site)
		return 1;
		return 0;
		}

		static int bytes_cmp(struct alloc_stat l, struct alloc_stat r)
		{
		if (l->bytes_alloc < r->bytes_alloc)
		return -1;
		else if (l->bytes_alloc > r->bytes_alloc)
		return 1;
		return 0;
		}

		static int parse_sort_opt(const struct option *opt __used,
		const char *arg, int unset __used)
		{
		sort_fn_t sort_fn;

		if (!arg)
		return -1;

		if (strcmp(arg, "ptr") == 0)
		sort_fn = ptr_cmp;
		else if (strcmp(arg, "call_site") == 0)
		sort_fn = callsite_cmp;
		else if (strcmp(arg, "bytes") == 0)
		sort_fn = bytes_cmp;
		else
		return -1;

		if (caller_flag > alloc_flag)
		caller_sort_fn = sort_fn;
		else
		alloc_sort_fn = sort_fn;

		return 0;
		}

		static int parse_stat_opt(const struct option *opt __used,
		const char *arg, int unset __used)
		{
		if (!arg)
		return -1;

		if (strcmp(arg, "alloc") == 0)
		alloc_flag = (caller_flag + 1);
		else if (strcmp(arg, "caller") == 0)
		caller_flag = (alloc_flag + 1);
		else
		return -1;
		return 0;
		}

		static int parse_line_opt(const struct option *opt __used,
		const char *arg, int unset __used)
		{
		int lines;

		if (!arg)
		return -1;

		lines = strtoul(arg, NULL, 10);

		if (caller_flag > alloc_flag)
		caller_lines = lines;
		else
		alloc_lines = lines;

		return 0;
		}

		static const struct option kmem_options[] = {
		OPT_STRING('i', "input", &input_name, "file",
		"input file name"),
		OPT_CALLBACK(0, "stat", NULL, "<alloc>\|<caller>",
		"stat selector, Pass 'alloc' or 'caller'.",
		parse_stat_opt),
		OPT_CALLBACK('s', "sort", NULL, "key",
		"sort by key: ptr, call_site, hit, bytes",
		parse_sort_opt),
		OPT_CALLBACK('l', "line", NULL, "num",
		"show n lins",
		parse_line_opt),
		OPT_END()
		};

		static const char *record_args[] = {
		"record",
		"-a",
		"-R",
		"-M",
		"-f",
		"-c", "1",
		"-e", "kmem:kmalloc",
		"-e", "kmem:kmalloc_node",
		"-e", "kmem:kfree",
		"-e", "kmem:kmem_cache_alloc",
		"-e", "kmem:kmem_cache_alloc_node",
		"-e", "kmem:kmem_cache_free",
		};

		static int __cmd_record(int argc, const char **argv)
		{
		unsigned int rec_argc, i, j;
		const char **rec_argv;

		rec_argc = ARRAY_SIZE(record_args) + argc - 1;
		rec_argv = calloc(rec_argc + 1, sizeof(char *));

		for (i = 0; i < ARRAY_SIZE(record_args); i++)
		rec_argv[i] = strdup(record_args[i]);

		for (j = 1; j < (unsigned int)argc; j++, i++)
		rec_argv[i] = argv[j];

		return cmd_record(i, rec_argv, NULL);
		}

		int cmd_kmem(int argc, const char *argv, const char prefix __used)
		{
		symbol__init(0);

		argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);

		if (argc && !strncmp(argv[0], "rec", 3))
		return __cmd_record(argc, argv);
		else if (argc)
		usage_with_options(kmem_usage, kmem_options);

		if (!alloc_sort_fn)
		alloc_sort_fn = bytes_cmp;
		if (!caller_sort_fn)
		caller_sort_fn = bytes_cmp;

		return __cmd_kmem();
		}

tools/perf/builtin.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -28,5 +28,6 @@ extern int cmd_top(int argc, const char *argv, const char prefix);
		extern int cmd_trace(int argc, const char *argv, const char prefix);
		extern int cmd_version(int argc, const char *argv, const char prefix);
		extern int cmd_probe(int argc, const char *argv, const char prefix);
		extern int cmd_kmem(int argc, const char *argv, const char prefix);

		#endif

tools/perf/perf.c

+14 −13

Original line number	Diff line number	Diff line
		@@ -285,9 +285,9 @@ static void handle_internal_command(int argc, const char **argv)
		{
		const char *cmd = argv[0];
		static struct cmd_struct commands[] = {
		{ "buildid-list", cmd_buildid_list, 0 },
		{ "help", cmd_help, 0 },
		{ "list", cmd_list, 0 },
		{ "buildid-list", cmd_buildid_list, 0 },
		{ "record", cmd_record, 0 },
		{ "report", cmd_report, 0 },
		{ "bench", cmd_bench, 0 },
		@@ -299,6 +299,7 @@ static void handle_internal_command(int argc, const char **argv)
		{ "trace", cmd_trace, 0 },
		{ "sched", cmd_sched, 0 },
		{ "probe", cmd_probe, 0 },
		{ "kmem", cmd_kmem, 0 },
		};
		unsigned int i;
		static const char ext[] = STRIP_EXTENSION;

Original line number	Diff line number	Diff line
		@@ -28,5 +28,6 @@ extern int cmd_top(int argc, const char *argv, const char prefix);
		extern int cmd_trace(int argc, const char *argv, const char prefix);
		extern int cmd_version(int argc, const char *argv, const char prefix);
		extern int cmd_probe(int argc, const char *argv, const char prefix);
		extern int cmd_kmem(int argc, const char *argv, const char prefix);

		#endif