Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1857 insertions, 0 deletions

diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
new file mode 100644
index 0000000000..de2fbb7c56
--- /dev/null
+++ b/tools/perf/builtin-kwork.c
@@ -0,0 +1,1857 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * builtin-kwork.c
+ *
+ * Copyright (c) 2022  Huawei Inc,  Yang Jihong <yangjihong1@huawei.com>
+ */
+
+#include "builtin.h"
+
+#include "util/data.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/header.h"
+#include "util/kwork.h"
+#include "util/debug.h"
+#include "util/session.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/string2.h"
+#include "util/callchain.h"
+#include "util/evsel_fprintf.h"
+#include "util/util.h"
+
+#include <subcmd/pager.h>
+#include <subcmd/parse-options.h>
+#include <traceevent/event-parse.h>
+
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <linux/err.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+
+/*
+ * report header elements width
+ */
+#define PRINT_CPU_WIDTH 4
+#define PRINT_COUNT_WIDTH 9
+#define PRINT_RUNTIME_WIDTH 10
+#define PRINT_LATENCY_WIDTH 10
+#define PRINT_TIMESTAMP_WIDTH 17
+#define PRINT_KWORK_NAME_WIDTH 30
+#define RPINT_DECIMAL_WIDTH 3
+#define PRINT_BRACKETPAIR_WIDTH 2
+#define PRINT_TIME_UNIT_SEC_WIDTH 2
+#define PRINT_TIME_UNIT_MESC_WIDTH 3
+#define PRINT_RUNTIME_HEADER_WIDTH (PRINT_RUNTIME_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
+#define PRINT_LATENCY_HEADER_WIDTH (PRINT_LATENCY_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
+#define PRINT_TIMEHIST_CPU_WIDTH (PRINT_CPU_WIDTH + PRINT_BRACKETPAIR_WIDTH)
+#define PRINT_TIMESTAMP_HEADER_WIDTH (PRINT_TIMESTAMP_WIDTH + PRINT_TIME_UNIT_SEC_WIDTH)
+
+struct sort_dimension {
+	const char      *name;
+	int             (*cmp)(struct kwork_work *l, struct kwork_work *r);
+	struct          list_head list;
+};
+
+static int id_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	if (l->cpu > r->cpu)
+		return 1;
+	if (l->cpu < r->cpu)
+		return -1;
+
+	if (l->id > r->id)
+		return 1;
+	if (l->id < r->id)
+		return -1;
+
+	return 0;
+}
+
+static int count_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	if (l->nr_atoms > r->nr_atoms)
+		return 1;
+	if (l->nr_atoms < r->nr_atoms)
+		return -1;
+
+	return 0;
+}
+
+static int runtime_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	if (l->total_runtime > r->total_runtime)
+		return 1;
+	if (l->total_runtime < r->total_runtime)
+		return -1;
+
+	return 0;
+}
+
+static int max_runtime_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	if (l->max_runtime > r->max_runtime)
+		return 1;
+	if (l->max_runtime < r->max_runtime)
+		return -1;
+
+	return 0;
+}
+
+static int avg_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	u64 avgl, avgr;
+
+	if (!r->nr_atoms)
+		return 1;
+	if (!l->nr_atoms)
+		return -1;
+
+	avgl = l->total_latency / l->nr_atoms;
+	avgr = r->total_latency / r->nr_atoms;
+
+	if (avgl > avgr)
+		return 1;
+	if (avgl < avgr)
+		return -1;
+
+	return 0;
+}
+
+static int max_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+	if (l->max_latency > r->max_latency)
+		return 1;
+	if (l->max_latency < r->max_latency)
+		return -1;
+
+	return 0;
+}
+
+static int sort_dimension__add(struct perf_kwork *kwork __maybe_unused,
+			       const char *tok, struct list_head *list)
+{
+	size_t i;
+	static struct sort_dimension max_sort_dimension = {
+		.name = "max",
+		.cmp  = max_runtime_cmp,
+	};
+	static struct sort_dimension id_sort_dimension = {
+		.name = "id",
+		.cmp  = id_cmp,
+	};
+	static struct sort_dimension runtime_sort_dimension = {
+		.name = "runtime",
+		.cmp  = runtime_cmp,
+	};
+	static struct sort_dimension count_sort_dimension = {
+		.name = "count",
+		.cmp  = count_cmp,
+	};
+	static struct sort_dimension avg_sort_dimension = {
+		.name = "avg",
+		.cmp  = avg_latency_cmp,
+	};
+	struct sort_dimension *available_sorts[] = {
+		&id_sort_dimension,
+		&max_sort_dimension,
+		&count_sort_dimension,
+		&runtime_sort_dimension,
+		&avg_sort_dimension,
+	};
+
+	if (kwork->report == KWORK_REPORT_LATENCY)
+		max_sort_dimension.cmp = max_latency_cmp;
+
+	for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
+		if (!strcmp(available_sorts[i]->name, tok)) {
+			list_add_tail(&available_sorts[i]->list, list);
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+static void setup_sorting(struct perf_kwork *kwork,
+			  const struct option *options,
+			  const char * const usage_msg[])
+{
+	char *tmp, *tok, *str = strdup(kwork->sort_order);
+
+	for (tok = strtok_r(str, ", ", &tmp);
+	     tok; tok = strtok_r(NULL, ", ", &tmp)) {
+		if (sort_dimension__add(kwork, tok, &kwork->sort_list) < 0)
+			usage_with_options_msg(usage_msg, options,
+					       "Unknown --sort key: `%s'", tok);
+	}
+
+	pr_debug("Sort order: %s\n", kwork->sort_order);
+	free(str);
+}
+
+static struct kwork_atom *atom_new(struct perf_kwork *kwork,
+				   struct perf_sample *sample)
+{
+	unsigned long i;
+	struct kwork_atom_page *page;
+	struct kwork_atom *atom = NULL;
+
+	list_for_each_entry(page, &kwork->atom_page_list, list) {
+		if (!bitmap_full(page->bitmap, NR_ATOM_PER_PAGE)) {
+			i = find_first_zero_bit(page->bitmap, NR_ATOM_PER_PAGE);
+			BUG_ON(i >= NR_ATOM_PER_PAGE);
+			atom = &page->atoms[i];
+			goto found_atom;
+		}
+	}
+
+	/*
+	 * new page
+	 */
+	page = zalloc(sizeof(*page));
+	if (page == NULL) {
+		pr_err("Failed to zalloc kwork atom page\n");
+		return NULL;
+	}
+
+	i = 0;
+	atom = &page->atoms[0];
+	list_add_tail(&page->list, &kwork->atom_page_list);
+
+found_atom:
+	__set_bit(i, page->bitmap);
+	atom->time = sample->time;
+	atom->prev = NULL;
+	atom->page_addr = page;
+	atom->bit_inpage = i;
+	return atom;
+}
+
+static void atom_free(struct kwork_atom *atom)
+{
+	if (atom->prev != NULL)
+		atom_free(atom->prev);
+
+	__clear_bit(atom->bit_inpage,
+		    ((struct kwork_atom_page *)atom->page_addr)->bitmap);
+}
+
+static void atom_del(struct kwork_atom *atom)
+{
+	list_del(&atom->list);
+	atom_free(atom);
+}
+
+static int work_cmp(struct list_head *list,
+		    struct kwork_work *l, struct kwork_work *r)
+{
+	int ret = 0;
+	struct sort_dimension *sort;
+
+	BUG_ON(list_empty(list));
+
+	list_for_each_entry(sort, list, list) {
+		ret = sort->cmp(l, r);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static struct kwork_work *work_search(struct rb_root_cached *root,
+				      struct kwork_work *key,
+				      struct list_head *sort_list)
+{
+	int cmp;
+	struct kwork_work *work;
+	struct rb_node *node = root->rb_root.rb_node;
+
+	while (node) {
+		work = container_of(node, struct kwork_work, node);
+		cmp = work_cmp(sort_list, key, work);
+		if (cmp > 0)
+			node = node->rb_left;
+		else if (cmp < 0)
+			node = node->rb_right;
+		else {
+			if (work->name == NULL)
+				work->name = key->name;
+			return work;
+		}
+	}
+	return NULL;
+}
+
+static void work_insert(struct rb_root_cached *root,
+			struct kwork_work *key, struct list_head *sort_list)
+{
+	int cmp;
+	bool leftmost = true;
+	struct kwork_work *cur;
+	struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
+
+	while (*new) {
+		cur = container_of(*new, struct kwork_work, node);
+		parent = *new;
+		cmp = work_cmp(sort_list, key, cur);
+
+		if (cmp > 0)
+			new = &((*new)->rb_left);
+		else {
+			new = &((*new)->rb_right);
+			leftmost = false;
+		}
+	}
+
+	rb_link_node(&key->node, parent, new);
+	rb_insert_color_cached(&key->node, root, leftmost);
+}
+
+static struct kwork_work *work_new(struct kwork_work *key)
+{
+	int i;
+	struct kwork_work *work = zalloc(sizeof(*work));
+
+	if (work == NULL) {
+		pr_err("Failed to zalloc kwork work\n");
+		return NULL;
+	}
+
+	for (i = 0; i < KWORK_TRACE_MAX; i++)
+		INIT_LIST_HEAD(&work->atom_list[i]);
+
+	work->id = key->id;
+	work->cpu = key->cpu;
+	work->name = key->name;
+	work->class = key->class;
+	return work;
+}
+
+static struct kwork_work *work_findnew(struct rb_root_cached *root,
+				       struct kwork_work *key,
+				       struct list_head *sort_list)
+{
+	struct kwork_work *work = work_search(root, key, sort_list);
+
+	if (work != NULL)
+		return work;
+
+	work = work_new(key);
+	if (work)
+		work_insert(root, work, sort_list);
+
+	return work;
+}
+
+static void profile_update_timespan(struct perf_kwork *kwork,
+				    struct perf_sample *sample)
+{
+	if (!kwork->summary)
+		return;
+
+	if ((kwork->timestart == 0) || (kwork->timestart > sample->time))
+		kwork->timestart = sample->time;
+
+	if (kwork->timeend < sample->time)
+		kwork->timeend = sample->time;
+}
+
+static bool profile_event_match(struct perf_kwork *kwork,
+				struct kwork_work *work,
+				struct perf_sample *sample)
+{
+	int cpu = work->cpu;
+	u64 time = sample->time;
+	struct perf_time_interval *ptime = &kwork->ptime;
+
+	if ((kwork->cpu_list != NULL) && !test_bit(cpu, kwork->cpu_bitmap))
+		return false;
+
+	if (((ptime->start != 0) && (ptime->start > time)) ||
+	    ((ptime->end != 0) && (ptime->end < time)))
+		return false;
+
+	if ((kwork->profile_name != NULL) &&
+	    (work->name != NULL) &&
+	    (strcmp(work->name, kwork->profile_name) != 0))
+		return false;
+
+	profile_update_timespan(kwork, sample);
+	return true;
+}
+
+static int work_push_atom(struct perf_kwork *kwork,
+			  struct kwork_class *class,
+			  enum kwork_trace_type src_type,
+			  enum kwork_trace_type dst_type,
+			  struct evsel *evsel,
+			  struct perf_sample *sample,
+			  struct machine *machine,
+			  struct kwork_work **ret_work)
+{
+	struct kwork_atom *atom, *dst_atom;
+	struct kwork_work *work, key;
+
+	BUG_ON(class->work_init == NULL);
+	class->work_init(class, &key, evsel, sample, machine);
+
+	atom = atom_new(kwork, sample);
+	if (atom == NULL)
+		return -1;
+
+	work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
+	if (work == NULL) {
+		atom_free(atom);
+		return -1;
+	}
+
+	if (!profile_event_match(kwork, work, sample)) {
+		atom_free(atom);
+		return 0;
+	}
+
+	if (dst_type < KWORK_TRACE_MAX) {
+		dst_atom = list_last_entry_or_null(&work->atom_list[dst_type],
+						   struct kwork_atom, list);
+		if (dst_atom != NULL) {
+			atom->prev = dst_atom;
+			list_del(&dst_atom->list);
+		}
+	}
+
+	if (ret_work != NULL)
+		*ret_work = work;
+
+	list_add_tail(&atom->list, &work->atom_list[src_type]);
+
+	return 0;
+}
+
+static struct kwork_atom *work_pop_atom(struct perf_kwork *kwork,
+					struct kwork_class *class,
+					enum kwork_trace_type src_type,
+					enum kwork_trace_type dst_type,
+					struct evsel *evsel,
+					struct perf_sample *sample,
+					struct machine *machine,
+					struct kwork_work **ret_work)
+{
+	struct kwork_atom *atom, *src_atom;
+	struct kwork_work *work, key;
+
+	BUG_ON(class->work_init == NULL);
+	class->work_init(class, &key, evsel, sample, machine);
+
+	work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
+	if (ret_work != NULL)
+		*ret_work = work;
+
+	if (work == NULL)
+		return NULL;
+
+	if (!profile_event_match(kwork, work, sample))
+		return NULL;
+
+	atom = list_last_entry_or_null(&work->atom_list[dst_type],
+				       struct kwork_atom, list);
+	if (atom != NULL)
+		return atom;
+
+	src_atom = atom_new(kwork, sample);
+	if (src_atom != NULL)
+		list_add_tail(&src_atom->list, &work->atom_list[src_type]);
+	else {
+		if (ret_work != NULL)
+			*ret_work = NULL;
+	}
+
+	return NULL;
+}
+
+static void report_update_exit_event(struct kwork_work *work,
+				     struct kwork_atom *atom,
+				     struct perf_sample *sample)
+{
+	u64 delta;
+	u64 exit_time = sample->time;
+	u64 entry_time = atom->time;
+
+	if ((entry_time != 0) && (exit_time >= entry_time)) {
+		delta = exit_time - entry_time;
+		if ((delta > work->max_runtime) ||
+		    (work->max_runtime == 0)) {
+			work->max_runtime = delta;
+			work->max_runtime_start = entry_time;
+			work->max_runtime_end = exit_time;
+		}
+		work->total_runtime += delta;
+		work->nr_atoms++;
+	}
+}
+
+static int report_entry_event(struct perf_kwork *kwork,
+			      struct kwork_class *class,
+			      struct evsel *evsel,
+			      struct perf_sample *sample,
+			      struct machine *machine)
+{
+	return work_push_atom(kwork, class, KWORK_TRACE_ENTRY,
+			      KWORK_TRACE_MAX, evsel, sample,
+			      machine, NULL);
+}
+
+static int report_exit_event(struct perf_kwork *kwork,
+			     struct kwork_class *class,
+			     struct evsel *evsel,
+			     struct perf_sample *sample,
+			     struct machine *machine)
+{
+	struct kwork_atom *atom = NULL;
+	struct kwork_work *work = NULL;
+
+	atom = work_pop_atom(kwork, class, KWORK_TRACE_EXIT,
+			     KWORK_TRACE_ENTRY, evsel, sample,
+			     machine, &work);
+	if (work == NULL)
+		return -1;
+
+	if (atom != NULL) {
+		report_update_exit_event(work, atom, sample);
+		atom_del(atom);
+	}
+
+	return 0;
+}
+
+static void latency_update_entry_event(struct kwork_work *work,
+				       struct kwork_atom *atom,
+				       struct perf_sample *sample)
+{
+	u64 delta;
+	u64 entry_time = sample->time;
+	u64 raise_time = atom->time;
+
+	if ((raise_time != 0) && (entry_time >= raise_time)) {
+		delta = entry_time - raise_time;
+		if ((delta > work->max_latency) ||
+		    (work->max_latency == 0)) {
+			work->max_latency = delta;
+			work->max_latency_start = raise_time;
+			work->max_latency_end = entry_time;
+		}
+		work->total_latency += delta;
+		work->nr_atoms++;
+	}
+}
+
+static int latency_raise_event(struct perf_kwork *kwork,
+			       struct kwork_class *class,
+			       struct evsel *evsel,
+			       struct perf_sample *sample,
+			       struct machine *machine)
+{
+	return work_push_atom(kwork, class, KWORK_TRACE_RAISE,
+			      KWORK_TRACE_MAX, evsel, sample,
+			      machine, NULL);
+}
+
+static int latency_entry_event(struct perf_kwork *kwork,
+			       struct kwork_class *class,
+			       struct evsel *evsel,
+			       struct perf_sample *sample,
+			       struct machine *machine)
+{
+	struct kwork_atom *atom = NULL;
+	struct kwork_work *work = NULL;
+
+	atom = work_pop_atom(kwork, class, KWORK_TRACE_ENTRY,
+			     KWORK_TRACE_RAISE, evsel, sample,
+			     machine, &work);
+	if (work == NULL)
+		return -1;
+
+	if (atom != NULL) {
+		latency_update_entry_event(work, atom, sample);
+		atom_del(atom);
+	}
+
+	return 0;
+}
+
+static void timehist_save_callchain(struct perf_kwork *kwork,
+				    struct perf_sample *sample,
+				    struct evsel *evsel,
+				    struct machine *machine)
+{
+	struct symbol *sym;
+	struct thread *thread;
+	struct callchain_cursor_node *node;
+	struct callchain_cursor *cursor;
+
+	if (!kwork->show_callchain || sample->callchain == NULL)
+		return;
+
+	/* want main thread for process - has maps */
+	thread = machine__findnew_thread(machine, sample->pid, sample->pid);
+	if (thread == NULL) {
+		pr_debug("Failed to get thread for pid %d\n", sample->pid);
+		return;
+	}
+
+	cursor = get_tls_callchain_cursor();
+
+	if (thread__resolve_callchain(thread, cursor, evsel, sample,
+				      NULL, NULL, kwork->max_stack + 2) != 0) {
+		pr_debug("Failed to resolve callchain, skipping\n");
+		goto out_put;
+	}
+
+	callchain_cursor_commit(cursor);
+
+	while (true) {
+		node = callchain_cursor_current(cursor);
+		if (node == NULL)
+			break;
+
+		sym = node->ms.sym;
+		if (sym) {
+			if (!strcmp(sym->name, "__softirqentry_text_start") ||
+			    !strcmp(sym->name, "__do_softirq"))
+				sym->ignore = 1;
+		}
+
+		callchain_cursor_advance(cursor);
+	}
+
+out_put:
+	thread__put(thread);
+}
+
+static void timehist_print_event(struct perf_kwork *kwork,
+				 struct kwork_work *work,
+				 struct kwork_atom *atom,
+				 struct perf_sample *sample,
+				 struct addr_location *al)
+{
+	char entrytime[32], exittime[32];
+	char kwork_name[PRINT_KWORK_NAME_WIDTH];
+
+	/*
+	 * runtime start
+	 */
+	timestamp__scnprintf_usec(atom->time,
+				  entrytime, sizeof(entrytime));
+	printf(" %*s ", PRINT_TIMESTAMP_WIDTH, entrytime);
+
+	/*
+	 * runtime end
+	 */
+	timestamp__scnprintf_usec(sample->time,
+				  exittime, sizeof(exittime));
+	printf(" %*s ", PRINT_TIMESTAMP_WIDTH, exittime);
+
+	/*
+	 * cpu
+	 */
+	printf(" [%0*d] ", PRINT_CPU_WIDTH, work->cpu);
+
+	/*
+	 * kwork name
+	 */
+	if (work->class && work->class->work_name) {
+		work->class->work_name(work, kwork_name,
+				       PRINT_KWORK_NAME_WIDTH);
+		printf(" %-*s ", PRINT_KWORK_NAME_WIDTH, kwork_name);
+	} else
+		printf(" %-*s ", PRINT_KWORK_NAME_WIDTH, "");
+
+	/*
+	 *runtime
+	 */
+	printf(" %*.*f ",
+	       PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+	       (double)(sample->time - atom->time) / NSEC_PER_MSEC);
+
+	/*
+	 * delaytime
+	 */
+	if (atom->prev != NULL)
+		printf(" %*.*f ", PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+		       (double)(atom->time - atom->prev->time) / NSEC_PER_MSEC);
+	else
+		printf(" %*s ", PRINT_LATENCY_WIDTH, " ");
+
+	/*
+	 * callchain
+	 */
+	if (kwork->show_callchain) {
+		struct callchain_cursor *cursor = get_tls_callchain_cursor();
+
+		if (cursor == NULL)
+			return;
+
+		printf(" ");
+
+		sample__fprintf_sym(sample, al, 0,
+				    EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
+				    EVSEL__PRINT_CALLCHAIN_ARROW |
+				    EVSEL__PRINT_SKIP_IGNORED,
+				    cursor, symbol_conf.bt_stop_list,
+				    stdout);
+	}
+
+	printf("\n");
+}
+
+static int timehist_raise_event(struct perf_kwork *kwork,
+				struct kwork_class *class,
+				struct evsel *evsel,
+				struct perf_sample *sample,
+				struct machine *machine)
+{
+	return work_push_atom(kwork, class, KWORK_TRACE_RAISE,
+			      KWORK_TRACE_MAX, evsel, sample,
+			      machine, NULL);
+}
+
+static int timehist_entry_event(struct perf_kwork *kwork,
+				struct kwork_class *class,
+				struct evsel *evsel,
+				struct perf_sample *sample,
+				struct machine *machine)
+{
+	int ret;
+	struct kwork_work *work = NULL;
+
+	ret = work_push_atom(kwork, class, KWORK_TRACE_ENTRY,
+			     KWORK_TRACE_RAISE, evsel, sample,
+			     machine, &work);
+	if (ret)
+		return ret;
+
+	if (work != NULL)
+		timehist_save_callchain(kwork, sample, evsel, machine);
+
+	return 0;
+}
+
+static int timehist_exit_event(struct perf_kwork *kwork,
+			       struct kwork_class *class,
+			       struct evsel *evsel,
+			       struct perf_sample *sample,
+			       struct machine *machine)
+{
+	struct kwork_atom *atom = NULL;
+	struct kwork_work *work = NULL;
+	struct addr_location al;
+	int ret = 0;
+
+	addr_location__init(&al);
+	if (machine__resolve(machine, &al, sample) < 0) {
+		pr_debug("Problem processing event, skipping it\n");
+		ret = -1;
+		goto out;
+	}
+
+	atom = work_pop_atom(kwork, class, KWORK_TRACE_EXIT,
+			     KWORK_TRACE_ENTRY, evsel, sample,
+			     machine, &work);
+	if (work == NULL) {
+		ret = -1;
+		goto out;
+	}
+
+	if (atom != NULL) {
+		work->nr_atoms++;
+		timehist_print_event(kwork, work, atom, sample, &al);
+		atom_del(atom);
+	}
+
+out:
+	addr_location__exit(&al);
+	return ret;
+}
+
+static struct kwork_class kwork_irq;
+static int process_irq_handler_entry_event(struct perf_tool *tool,
+					   struct evsel *evsel,
+					   struct perf_sample *sample,
+					   struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->entry_event)
+		return kwork->tp_handler->entry_event(kwork, &kwork_irq,
+						      evsel, sample, machine);
+	return 0;
+}
+
+static int process_irq_handler_exit_event(struct perf_tool *tool,
+					  struct evsel *evsel,
+					  struct perf_sample *sample,
+					  struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->exit_event)
+		return kwork->tp_handler->exit_event(kwork, &kwork_irq,
+						     evsel, sample, machine);
+	return 0;
+}
+
+const struct evsel_str_handler irq_tp_handlers[] = {
+	{ "irq:irq_handler_entry", process_irq_handler_entry_event, },
+	{ "irq:irq_handler_exit",  process_irq_handler_exit_event,  },
+};
+
+static int irq_class_init(struct kwork_class *class,
+			  struct perf_session *session)
+{
+	if (perf_session__set_tracepoints_handlers(session, irq_tp_handlers)) {
+		pr_err("Failed to set irq tracepoints handlers\n");
+		return -1;
+	}
+
+	class->work_root = RB_ROOT_CACHED;
+	return 0;
+}
+
+static void irq_work_init(struct kwork_class *class,
+			  struct kwork_work *work,
+			  struct evsel *evsel,
+			  struct perf_sample *sample,
+			  struct machine *machine __maybe_unused)
+{
+	work->class = class;
+	work->cpu = sample->cpu;
+	work->id = evsel__intval(evsel, sample, "irq");
+	work->name = evsel__strval(evsel, sample, "name");
+}
+
+static void irq_work_name(struct kwork_work *work, char *buf, int len)
+{
+	snprintf(buf, len, "%s:%" PRIu64 "", work->name, work->id);
+}
+
+static struct kwork_class kwork_irq = {
+	.name           = "irq",
+	.type           = KWORK_CLASS_IRQ,
+	.nr_tracepoints = 2,
+	.tp_handlers    = irq_tp_handlers,
+	.class_init     = irq_class_init,
+	.work_init      = irq_work_init,
+	.work_name      = irq_work_name,
+};
+
+static struct kwork_class kwork_softirq;
+static int process_softirq_raise_event(struct perf_tool *tool,
+				       struct evsel *evsel,
+				       struct perf_sample *sample,
+				       struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->raise_event)
+		return kwork->tp_handler->raise_event(kwork, &kwork_softirq,
+						      evsel, sample, machine);
+
+	return 0;
+}
+
+static int process_softirq_entry_event(struct perf_tool *tool,
+				       struct evsel *evsel,
+				       struct perf_sample *sample,
+				       struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->entry_event)
+		return kwork->tp_handler->entry_event(kwork, &kwork_softirq,
+						      evsel, sample, machine);
+
+	return 0;
+}
+
+static int process_softirq_exit_event(struct perf_tool *tool,
+				      struct evsel *evsel,
+				      struct perf_sample *sample,
+				      struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->exit_event)
+		return kwork->tp_handler->exit_event(kwork, &kwork_softirq,
+						     evsel, sample, machine);
+
+	return 0;
+}
+
+const struct evsel_str_handler softirq_tp_handlers[] = {
+	{ "irq:softirq_raise", process_softirq_raise_event, },
+	{ "irq:softirq_entry", process_softirq_entry_event, },
+	{ "irq:softirq_exit",  process_softirq_exit_event,  },
+};
+
+static int softirq_class_init(struct kwork_class *class,
+			      struct perf_session *session)
+{
+	if (perf_session__set_tracepoints_handlers(session,
+						   softirq_tp_handlers)) {
+		pr_err("Failed to set softirq tracepoints handlers\n");
+		return -1;
+	}
+
+	class->work_root = RB_ROOT_CACHED;
+	return 0;
+}
+
+static char *evsel__softirq_name(struct evsel *evsel, u64 num)
+{
+	char *name = NULL;
+	bool found = false;
+	struct tep_print_flag_sym *sym = NULL;
+	struct tep_print_arg *args = evsel->tp_format->print_fmt.args;
+
+	if ((args == NULL) || (args->next == NULL))
+		return NULL;
+
+	/* skip softirq field: "REC->vec" */
+	for (sym = args->next->symbol.symbols; sym != NULL; sym = sym->next) {
+		if ((eval_flag(sym->value) == (unsigned long long)num) &&
+		    (strlen(sym->str) != 0)) {
+			found = true;
+			break;
+		}
+	}
+
+	if (!found)
+		return NULL;
+
+	name = strdup(sym->str);
+	if (name == NULL) {
+		pr_err("Failed to copy symbol name\n");
+		return NULL;
+	}
+	return name;
+}
+
+static void softirq_work_init(struct kwork_class *class,
+			      struct kwork_work *work,
+			      struct evsel *evsel,
+			      struct perf_sample *sample,
+			      struct machine *machine __maybe_unused)
+{
+	u64 num = evsel__intval(evsel, sample, "vec");
+
+	work->id = num;
+	work->class = class;
+	work->cpu = sample->cpu;
+	work->name = evsel__softirq_name(evsel, num);
+}
+
+static void softirq_work_name(struct kwork_work *work, char *buf, int len)
+{
+	snprintf(buf, len, "(s)%s:%" PRIu64 "", work->name, work->id);
+}
+
+static struct kwork_class kwork_softirq = {
+	.name           = "softirq",
+	.type           = KWORK_CLASS_SOFTIRQ,
+	.nr_tracepoints = 3,
+	.tp_handlers    = softirq_tp_handlers,
+	.class_init     = softirq_class_init,
+	.work_init      = softirq_work_init,
+	.work_name      = softirq_work_name,
+};
+
+static struct kwork_class kwork_workqueue;
+static int process_workqueue_activate_work_event(struct perf_tool *tool,
+						 struct evsel *evsel,
+						 struct perf_sample *sample,
+						 struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->raise_event)
+		return kwork->tp_handler->raise_event(kwork, &kwork_workqueue,
+						    evsel, sample, machine);
+
+	return 0;
+}
+
+static int process_workqueue_execute_start_event(struct perf_tool *tool,
+						 struct evsel *evsel,
+						 struct perf_sample *sample,
+						 struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->entry_event)
+		return kwork->tp_handler->entry_event(kwork, &kwork_workqueue,
+						    evsel, sample, machine);
+
+	return 0;
+}
+
+static int process_workqueue_execute_end_event(struct perf_tool *tool,
+					       struct evsel *evsel,
+					       struct perf_sample *sample,
+					       struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->exit_event)
+		return kwork->tp_handler->exit_event(kwork, &kwork_workqueue,
+						   evsel, sample, machine);
+
+	return 0;
+}
+
+const struct evsel_str_handler workqueue_tp_handlers[] = {
+	{ "workqueue:workqueue_activate_work", process_workqueue_activate_work_event, },
+	{ "workqueue:workqueue_execute_start", process_workqueue_execute_start_event, },
+	{ "workqueue:workqueue_execute_end",   process_workqueue_execute_end_event,   },
+};
+
+static int workqueue_class_init(struct kwork_class *class,
+				struct perf_session *session)
+{
+	if (perf_session__set_tracepoints_handlers(session,
+						   workqueue_tp_handlers)) {
+		pr_err("Failed to set workqueue tracepoints handlers\n");
+		return -1;
+	}
+
+	class->work_root = RB_ROOT_CACHED;
+	return 0;
+}
+
+static void workqueue_work_init(struct kwork_class *class,
+				struct kwork_work *work,
+				struct evsel *evsel,
+				struct perf_sample *sample,
+				struct machine *machine)
+{
+	char *modp = NULL;
+	unsigned long long function_addr = evsel__intval(evsel,
+							 sample, "function");
+
+	work->class = class;
+	work->cpu = sample->cpu;
+	work->id = evsel__intval(evsel, sample, "work");
+	work->name = function_addr == 0 ? NULL :
+		machine__resolve_kernel_addr(machine, &function_addr, &modp);
+}
+
+static void workqueue_work_name(struct kwork_work *work, char *buf, int len)
+{
+	if (work->name != NULL)
+		snprintf(buf, len, "(w)%s", work->name);
+	else
+		snprintf(buf, len, "(w)0x%" PRIx64, work->id);
+}
+
+static struct kwork_class kwork_workqueue = {
+	.name           = "workqueue",
+	.type           = KWORK_CLASS_WORKQUEUE,
+	.nr_tracepoints = 3,
+	.tp_handlers    = workqueue_tp_handlers,
+	.class_init     = workqueue_class_init,
+	.work_init      = workqueue_work_init,
+	.work_name      = workqueue_work_name,
+};
+
+static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {
+	[KWORK_CLASS_IRQ]       = &kwork_irq,
+	[KWORK_CLASS_SOFTIRQ]   = &kwork_softirq,
+	[KWORK_CLASS_WORKQUEUE] = &kwork_workqueue,
+};
+
+static void print_separator(int len)
+{
+	printf(" %.*s\n", len, graph_dotted_line);
+}
+
+static int report_print_work(struct perf_kwork *kwork, struct kwork_work *work)
+{
+	int ret = 0;
+	char kwork_name[PRINT_KWORK_NAME_WIDTH];
+	char max_runtime_start[32], max_runtime_end[32];
+	char max_latency_start[32], max_latency_end[32];
+
+	printf(" ");
+
+	/*
+	 * kwork name
+	 */
+	if (work->class && work->class->work_name) {
+		work->class->work_name(work, kwork_name,
+				       PRINT_KWORK_NAME_WIDTH);
+		ret += printf(" %-*s |", PRINT_KWORK_NAME_WIDTH, kwork_name);
+	} else {
+		ret += printf(" %-*s |", PRINT_KWORK_NAME_WIDTH, "");
+	}
+
+	/*
+	 * cpu
+	 */
+	ret += printf(" %0*d |", PRINT_CPU_WIDTH, work->cpu);
+
+	/*
+	 * total runtime
+	 */
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		ret += printf(" %*.*f ms |",
+			      PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+			      (double)work->total_runtime / NSEC_PER_MSEC);
+	} else if (kwork->report == KWORK_REPORT_LATENCY) { // avg delay
+		ret += printf(" %*.*f ms |",
+			      PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+			      (double)work->total_latency /
+			      work->nr_atoms / NSEC_PER_MSEC);
+	}
+
+	/*
+	 * count
+	 */
+	ret += printf(" %*" PRIu64 " |", PRINT_COUNT_WIDTH, work->nr_atoms);
+
+	/*
+	 * max runtime, max runtime start, max runtime end
+	 */
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		timestamp__scnprintf_usec(work->max_runtime_start,
+					  max_runtime_start,
+					  sizeof(max_runtime_start));
+		timestamp__scnprintf_usec(work->max_runtime_end,
+					  max_runtime_end,
+					  sizeof(max_runtime_end));
+		ret += printf(" %*.*f ms | %*s s | %*s s |",
+			      PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+			      (double)work->max_runtime / NSEC_PER_MSEC,
+			      PRINT_TIMESTAMP_WIDTH, max_runtime_start,
+			      PRINT_TIMESTAMP_WIDTH, max_runtime_end);
+	}
+	/*
+	 * max delay, max delay start, max delay end
+	 */
+	else if (kwork->report == KWORK_REPORT_LATENCY) {
+		timestamp__scnprintf_usec(work->max_latency_start,
+					  max_latency_start,
+					  sizeof(max_latency_start));
+		timestamp__scnprintf_usec(work->max_latency_end,
+					  max_latency_end,
+					  sizeof(max_latency_end));
+		ret += printf(" %*.*f ms | %*s s | %*s s |",
+			      PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+			      (double)work->max_latency / NSEC_PER_MSEC,
+			      PRINT_TIMESTAMP_WIDTH, max_latency_start,
+			      PRINT_TIMESTAMP_WIDTH, max_latency_end);
+	}
+
+	printf("\n");
+	return ret;
+}
+
+static int report_print_header(struct perf_kwork *kwork)
+{
+	int ret;
+
+	printf("\n ");
+	ret = printf(" %-*s | %-*s |",
+		     PRINT_KWORK_NAME_WIDTH, "Kwork Name",
+		     PRINT_CPU_WIDTH, "Cpu");
+
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		ret += printf(" %-*s |",
+			      PRINT_RUNTIME_HEADER_WIDTH, "Total Runtime");
+	} else if (kwork->report == KWORK_REPORT_LATENCY) {
+		ret += printf(" %-*s |",
+			      PRINT_LATENCY_HEADER_WIDTH, "Avg delay");
+	}
+
+	ret += printf(" %-*s |", PRINT_COUNT_WIDTH, "Count");
+
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		ret += printf(" %-*s | %-*s | %-*s |",
+			      PRINT_RUNTIME_HEADER_WIDTH, "Max runtime",
+			      PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime start",
+			      PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime end");
+	} else if (kwork->report == KWORK_REPORT_LATENCY) {
+		ret += printf(" %-*s | %-*s | %-*s |",
+			      PRINT_LATENCY_HEADER_WIDTH, "Max delay",
+			      PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay start",
+			      PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay end");
+	}
+
+	printf("\n");
+	print_separator(ret);
+	return ret;
+}
+
+static void timehist_print_header(void)
+{
+	/*
+	 * header row
+	 */
+	printf(" %-*s  %-*s  %-*s  %-*s  %-*s  %-*s\n",
+	       PRINT_TIMESTAMP_WIDTH, "Runtime start",
+	       PRINT_TIMESTAMP_WIDTH, "Runtime end",
+	       PRINT_TIMEHIST_CPU_WIDTH, "Cpu",
+	       PRINT_KWORK_NAME_WIDTH, "Kwork name",
+	       PRINT_RUNTIME_WIDTH, "Runtime",
+	       PRINT_RUNTIME_WIDTH, "Delaytime");
+
+	/*
+	 * units row
+	 */
+	printf(" %-*s  %-*s  %-*s  %-*s  %-*s  %-*s\n",
+	       PRINT_TIMESTAMP_WIDTH, "",
+	       PRINT_TIMESTAMP_WIDTH, "",
+	       PRINT_TIMEHIST_CPU_WIDTH, "",
+	       PRINT_KWORK_NAME_WIDTH, "(TYPE)NAME:NUM",
+	       PRINT_RUNTIME_WIDTH, "(msec)",
+	       PRINT_RUNTIME_WIDTH, "(msec)");
+
+	/*
+	 * separator
+	 */
+	printf(" %.*s  %.*s  %.*s  %.*s  %.*s  %.*s\n",
+	       PRINT_TIMESTAMP_WIDTH, graph_dotted_line,
+	       PRINT_TIMESTAMP_WIDTH, graph_dotted_line,
+	       PRINT_TIMEHIST_CPU_WIDTH, graph_dotted_line,
+	       PRINT_KWORK_NAME_WIDTH, graph_dotted_line,
+	       PRINT_RUNTIME_WIDTH, graph_dotted_line,
+	       PRINT_RUNTIME_WIDTH, graph_dotted_line);
+}
+
+static void print_summary(struct perf_kwork *kwork)
+{
+	u64 time = kwork->timeend - kwork->timestart;
+
+	printf("  Total count            : %9" PRIu64 "\n", kwork->all_count);
+	printf("  Total runtime   (msec) : %9.3f (%.3f%% load average)\n",
+	       (double)kwork->all_runtime / NSEC_PER_MSEC,
+	       time == 0 ? 0 : (double)kwork->all_runtime / time);
+	printf("  Total time span (msec) : %9.3f\n",
+	       (double)time / NSEC_PER_MSEC);
+}
+
+static unsigned long long nr_list_entry(struct list_head *head)
+{
+	struct list_head *pos;
+	unsigned long long n = 0;
+
+	list_for_each(pos, head)
+		n++;
+
+	return n;
+}
+
+static void print_skipped_events(struct perf_kwork *kwork)
+{
+	int i;
+	const char *const kwork_event_str[] = {
+		[KWORK_TRACE_RAISE] = "raise",
+		[KWORK_TRACE_ENTRY] = "entry",
+		[KWORK_TRACE_EXIT]  = "exit",
+	};
+
+	if ((kwork->nr_skipped_events[KWORK_TRACE_MAX] != 0) &&
+	    (kwork->nr_events != 0)) {
+		printf("  INFO: %.3f%% skipped events (%" PRIu64 " including ",
+		       (double)kwork->nr_skipped_events[KWORK_TRACE_MAX] /
+		       (double)kwork->nr_events * 100.0,
+		       kwork->nr_skipped_events[KWORK_TRACE_MAX]);
+
+		for (i = 0; i < KWORK_TRACE_MAX; i++) {
+			printf("%" PRIu64 " %s%s",
+			       kwork->nr_skipped_events[i],
+			       kwork_event_str[i],
+			       (i == KWORK_TRACE_MAX - 1) ? ")\n" : ", ");
+		}
+	}
+
+	if (verbose > 0)
+		printf("  INFO: use %lld atom pages\n",
+		       nr_list_entry(&kwork->atom_page_list));
+}
+
+static void print_bad_events(struct perf_kwork *kwork)
+{
+	if ((kwork->nr_lost_events != 0) && (kwork->nr_events != 0)) {
+		printf("  INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+		       (double)kwork->nr_lost_events /
+		       (double)kwork->nr_events * 100.0,
+		       kwork->nr_lost_events, kwork->nr_events,
+		       kwork->nr_lost_chunks);
+	}
+}
+
+static void work_sort(struct perf_kwork *kwork, struct kwork_class *class)
+{
+	struct rb_node *node;
+	struct kwork_work *data;
+	struct rb_root_cached *root = &class->work_root;
+
+	pr_debug("Sorting %s ...\n", class->name);
+	for (;;) {
+		node = rb_first_cached(root);
+		if (!node)
+			break;
+
+		rb_erase_cached(node, root);
+		data = rb_entry(node, struct kwork_work, node);
+		work_insert(&kwork->sorted_work_root,
+			       data, &kwork->sort_list);
+	}
+}
+
+static void perf_kwork__sort(struct perf_kwork *kwork)
+{
+	struct kwork_class *class;
+
+	list_for_each_entry(class, &kwork->class_list, list)
+		work_sort(kwork, class);
+}
+
+static int perf_kwork__check_config(struct perf_kwork *kwork,
+				    struct perf_session *session)
+{
+	int ret;
+	struct evsel *evsel;
+	struct kwork_class *class;
+
+	static struct trace_kwork_handler report_ops = {
+		.entry_event = report_entry_event,
+		.exit_event  = report_exit_event,
+	};
+	static struct trace_kwork_handler latency_ops = {
+		.raise_event = latency_raise_event,
+		.entry_event = latency_entry_event,
+	};
+	static struct trace_kwork_handler timehist_ops = {
+		.raise_event = timehist_raise_event,
+		.entry_event = timehist_entry_event,
+		.exit_event  = timehist_exit_event,
+	};
+
+	switch (kwork->report) {
+	case KWORK_REPORT_RUNTIME:
+		kwork->tp_handler = &report_ops;
+		break;
+	case KWORK_REPORT_LATENCY:
+		kwork->tp_handler = &latency_ops;
+		break;
+	case KWORK_REPORT_TIMEHIST:
+		kwork->tp_handler = &timehist_ops;
+		break;
+	default:
+		pr_debug("Invalid report type %d\n", kwork->report);
+		return -1;
+	}
+
+	list_for_each_entry(class, &kwork->class_list, list)
+		if ((class->class_init != NULL) &&
+		    (class->class_init(class, session) != 0))
+			return -1;
+
+	if (kwork->cpu_list != NULL) {
+		ret = perf_session__cpu_bitmap(session,
+					       kwork->cpu_list,
+					       kwork->cpu_bitmap);
+		if (ret < 0) {
+			pr_err("Invalid cpu bitmap\n");
+			return -1;
+		}
+	}
+
+	if (kwork->time_str != NULL) {
+		ret = perf_time__parse_str(&kwork->ptime, kwork->time_str);
+		if (ret != 0) {
+			pr_err("Invalid time span\n");
+			return -1;
+		}
+	}
+
+	list_for_each_entry(evsel, &session->evlist->core.entries, core.node) {
+		if (kwork->show_callchain && !evsel__has_callchain(evsel)) {
+			pr_debug("Samples do not have callchains\n");
+			kwork->show_callchain = 0;
+			symbol_conf.use_callchain = 0;
+		}
+	}
+
+	return 0;
+}
+
+static int perf_kwork__read_events(struct perf_kwork *kwork)
+{
+	int ret = -1;
+	struct perf_session *session = NULL;
+
+	struct perf_data data = {
+		.path  = input_name,
+		.mode  = PERF_DATA_MODE_READ,
+		.force = kwork->force,
+	};
+
+	session = perf_session__new(&data, &kwork->tool);
+	if (IS_ERR(session)) {
+		pr_debug("Error creating perf session\n");
+		return PTR_ERR(session);
+	}
+
+	symbol__init(&session->header.env);
+
+	if (perf_kwork__check_config(kwork, session) != 0)
+		goto out_delete;
+
+	if (session->tevent.pevent &&
+	    tep_set_function_resolver(session->tevent.pevent,
+				      machine__resolve_kernel_addr,
+				      &session->machines.host) < 0) {
+		pr_err("Failed to set libtraceevent function resolver\n");
+		goto out_delete;
+	}
+
+	if (kwork->report == KWORK_REPORT_TIMEHIST)
+		timehist_print_header();
+
+	ret = perf_session__process_events(session);
+	if (ret) {
+		pr_debug("Failed to process events, error %d\n", ret);
+		goto out_delete;
+	}
+
+	kwork->nr_events      = session->evlist->stats.nr_events[0];
+	kwork->nr_lost_events = session->evlist->stats.total_lost;
+	kwork->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
+
+out_delete:
+	perf_session__delete(session);
+	return ret;
+}
+
+static void process_skipped_events(struct perf_kwork *kwork,
+				   struct kwork_work *work)
+{
+	int i;
+	unsigned long long count;
+
+	for (i = 0; i < KWORK_TRACE_MAX; i++) {
+		count = nr_list_entry(&work->atom_list[i]);
+		kwork->nr_skipped_events[i] += count;
+		kwork->nr_skipped_events[KWORK_TRACE_MAX] += count;
+	}
+}
+
+struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork,
+				       struct kwork_class *class,
+				       struct kwork_work *key)
+{
+	struct kwork_work *work = NULL;
+
+	work = work_new(key);
+	if (work == NULL)
+		return NULL;
+
+	work_insert(&class->work_root, work, &kwork->cmp_id);
+	return work;
+}
+
+static void sig_handler(int sig)
+{
+	/*
+	 * Simply capture termination signal so that
+	 * the program can continue after pause returns
+	 */
+	pr_debug("Captuer signal %d\n", sig);
+}
+
+static int perf_kwork__report_bpf(struct perf_kwork *kwork)
+{
+	int ret;
+
+	signal(SIGINT, sig_handler);
+	signal(SIGTERM, sig_handler);
+
+	ret = perf_kwork__trace_prepare_bpf(kwork);
+	if (ret)
+		return -1;
+
+	printf("Starting trace, Hit <Ctrl+C> to stop and report\n");
+
+	perf_kwork__trace_start();
+
+	/*
+	 * a simple pause, wait here for stop signal
+	 */
+	pause();
+
+	perf_kwork__trace_finish();
+
+	perf_kwork__report_read_bpf(kwork);
+
+	perf_kwork__report_cleanup_bpf();
+
+	return 0;
+}
+
+static int perf_kwork__report(struct perf_kwork *kwork)
+{
+	int ret;
+	struct rb_node *next;
+	struct kwork_work *work;
+
+	if (kwork->use_bpf)
+		ret = perf_kwork__report_bpf(kwork);
+	else
+		ret = perf_kwork__read_events(kwork);
+
+	if (ret != 0)
+		return -1;
+
+	perf_kwork__sort(kwork);
+
+	setup_pager();
+
+	ret = report_print_header(kwork);
+	next = rb_first_cached(&kwork->sorted_work_root);
+	while (next) {
+		work = rb_entry(next, struct kwork_work, node);
+		process_skipped_events(kwork, work);
+
+		if (work->nr_atoms != 0) {
+			report_print_work(kwork, work);
+			if (kwork->summary) {
+				kwork->all_runtime += work->total_runtime;
+				kwork->all_count += work->nr_atoms;
+			}
+		}
+		next = rb_next(next);
+	}
+	print_separator(ret);
+
+	if (kwork->summary) {
+		print_summary(kwork);
+		print_separator(ret);
+	}
+
+	print_bad_events(kwork);
+	print_skipped_events(kwork);
+	printf("\n");
+
+	return 0;
+}
+
+typedef int (*tracepoint_handler)(struct perf_tool *tool,
+				  struct evsel *evsel,
+				  struct perf_sample *sample,
+				  struct machine *machine);
+
+static int perf_kwork__process_tracepoint_sample(struct perf_tool *tool,
+						 union perf_event *event __maybe_unused,
+						 struct perf_sample *sample,
+						 struct evsel *evsel,
+						 struct machine *machine)
+{
+	int err = 0;
+
+	if (evsel->handler != NULL) {
+		tracepoint_handler f = evsel->handler;
+
+		err = f(tool, evsel, sample, machine);
+	}
+
+	return err;
+}
+
+static int perf_kwork__timehist(struct perf_kwork *kwork)
+{
+	/*
+	 * event handlers for timehist option
+	 */
+	kwork->tool.comm	 = perf_event__process_comm;
+	kwork->tool.exit	 = perf_event__process_exit;
+	kwork->tool.fork	 = perf_event__process_fork;
+	kwork->tool.attr	 = perf_event__process_attr;
+	kwork->tool.tracing_data = perf_event__process_tracing_data;
+	kwork->tool.build_id	 = perf_event__process_build_id;
+	kwork->tool.ordered_events = true;
+	kwork->tool.ordering_requires_timestamps = true;
+	symbol_conf.use_callchain = kwork->show_callchain;
+
+	if (symbol__validate_sym_arguments()) {
+		pr_err("Failed to validate sym arguments\n");
+		return -1;
+	}
+
+	setup_pager();
+
+	return perf_kwork__read_events(kwork);
+}
+
+static void setup_event_list(struct perf_kwork *kwork,
+			     const struct option *options,
+			     const char * const usage_msg[])
+{
+	int i;
+	struct kwork_class *class;
+	char *tmp, *tok, *str;
+
+	if (kwork->event_list_str == NULL)
+		goto null_event_list_str;
+
+	str = strdup(kwork->event_list_str);
+	for (tok = strtok_r(str, ", ", &tmp);
+	     tok; tok = strtok_r(NULL, ", ", &tmp)) {
+		for (i = 0; i < KWORK_CLASS_MAX; i++) {
+			class = kwork_class_supported_list[i];
+			if (strcmp(tok, class->name) == 0) {
+				list_add_tail(&class->list, &kwork->class_list);
+				break;
+			}
+		}
+		if (i == KWORK_CLASS_MAX) {
+			usage_with_options_msg(usage_msg, options,
+					       "Unknown --event key: `%s'", tok);
+		}
+	}
+	free(str);
+
+null_event_list_str:
+	/*
+	 * config all kwork events if not specified
+	 */
+	if (list_empty(&kwork->class_list)) {
+		for (i = 0; i < KWORK_CLASS_MAX; i++) {
+			list_add_tail(&kwork_class_supported_list[i]->list,
+				      &kwork->class_list);
+		}
+	}
+
+	pr_debug("Config event list:");
+	list_for_each_entry(class, &kwork->class_list, list)
+		pr_debug(" %s", class->name);
+	pr_debug("\n");
+}
+
+static int perf_kwork__record(struct perf_kwork *kwork,
+			      int argc, const char **argv)
+{
+	const char **rec_argv;
+	unsigned int rec_argc, i, j;
+	struct kwork_class *class;
+
+	const char *const record_args[] = {
+		"record",
+		"-a",
+		"-R",
+		"-m", "1024",
+		"-c", "1",
+	};
+
+	rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+
+	list_for_each_entry(class, &kwork->class_list, list)
+		rec_argc += 2 * class->nr_tracepoints;
+
+	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+	if (rec_argv == NULL)
+		return -ENOMEM;
+
+	for (i = 0; i < ARRAY_SIZE(record_args); i++)
+		rec_argv[i] = strdup(record_args[i]);
+
+	list_for_each_entry(class, &kwork->class_list, list) {
+		for (j = 0; j < class->nr_tracepoints; j++) {
+			rec_argv[i++] = strdup("-e");
+			rec_argv[i++] = strdup(class->tp_handlers[j].name);
+		}
+	}
+
+	for (j = 1; j < (unsigned int)argc; j++, i++)
+		rec_argv[i] = argv[j];
+
+	BUG_ON(i != rec_argc);
+
+	pr_debug("record comm: ");
+	for (j = 0; j < rec_argc; j++)
+		pr_debug("%s ", rec_argv[j]);
+	pr_debug("\n");
+
+	return cmd_record(i, rec_argv);
+}
+
+int cmd_kwork(int argc, const char **argv)
+{
+	static struct perf_kwork kwork = {
+		.class_list          = LIST_HEAD_INIT(kwork.class_list),
+		.tool = {
+			.mmap		= perf_event__process_mmap,
+			.mmap2		= perf_event__process_mmap2,
+			.sample		= perf_kwork__process_tracepoint_sample,
+			.ordered_events = true,
+		},
+		.atom_page_list      = LIST_HEAD_INIT(kwork.atom_page_list),
+		.sort_list           = LIST_HEAD_INIT(kwork.sort_list),
+		.cmp_id              = LIST_HEAD_INIT(kwork.cmp_id),
+		.sorted_work_root    = RB_ROOT_CACHED,
+		.tp_handler          = NULL,
+		.profile_name        = NULL,
+		.cpu_list            = NULL,
+		.time_str            = NULL,
+		.force               = false,
+		.event_list_str      = NULL,
+		.summary             = false,
+		.sort_order          = NULL,
+		.show_callchain      = false,
+		.max_stack           = 5,
+		.timestart           = 0,
+		.timeend             = 0,
+		.nr_events           = 0,
+		.nr_lost_chunks      = 0,
+		.nr_lost_events      = 0,
+		.all_runtime         = 0,
+		.all_count           = 0,
+		.nr_skipped_events   = { 0 },
+	};
+	static const char default_report_sort_order[] = "runtime, max, count";
+	static const char default_latency_sort_order[] = "avg, max, count";
+	const struct option kwork_options[] = {
+	OPT_INCR('v', "verbose", &verbose,
+		 "be more verbose (show symbol address, etc)"),
+	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+		    "dump raw trace in ASCII"),
+	OPT_STRING('k', "kwork", &kwork.event_list_str, "kwork",
+		   "list of kwork to profile (irq, softirq, workqueue, etc)"),
+	OPT_BOOLEAN('f', "force", &kwork.force, "don't complain, do it"),
+	OPT_END()
+	};
+	const struct option report_options[] = {
+	OPT_STRING('s', "sort", &kwork.sort_order, "key[,key2...]",
+		   "sort by key(s): runtime, max, count"),
+	OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+		   "list of cpus to profile"),
+	OPT_STRING('n', "name", &kwork.profile_name, "name",
+		   "event name to profile"),
+	OPT_STRING(0, "time", &kwork.time_str, "str",
+		   "Time span for analysis (start,stop)"),
+	OPT_STRING('i', "input", &input_name, "file",
+		   "input file name"),
+	OPT_BOOLEAN('S', "with-summary", &kwork.summary,
+		    "Show summary with statistics"),
+#ifdef HAVE_BPF_SKEL
+	OPT_BOOLEAN('b', "use-bpf", &kwork.use_bpf,
+		    "Use BPF to measure kwork runtime"),
+#endif
+	OPT_PARENT(kwork_options)
+	};
+	const struct option latency_options[] = {
+	OPT_STRING('s', "sort", &kwork.sort_order, "key[,key2...]",
+		   "sort by key(s): avg, max, count"),
+	OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+		   "list of cpus to profile"),
+	OPT_STRING('n', "name", &kwork.profile_name, "name",
+		   "event name to profile"),
+	OPT_STRING(0, "time", &kwork.time_str, "str",
+		   "Time span for analysis (start,stop)"),
+	OPT_STRING('i', "input", &input_name, "file",
+		   "input file name"),
+#ifdef HAVE_BPF_SKEL
+	OPT_BOOLEAN('b', "use-bpf", &kwork.use_bpf,
+		    "Use BPF to measure kwork latency"),
+#endif
+	OPT_PARENT(kwork_options)
+	};
+	const struct option timehist_options[] = {
+	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+		   "file", "vmlinux pathname"),
+	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
+		   "file", "kallsyms pathname"),
+	OPT_BOOLEAN('g', "call-graph", &kwork.show_callchain,
+		    "Display call chains if present"),
+	OPT_UINTEGER(0, "max-stack", &kwork.max_stack,
+		   "Maximum number of functions to display backtrace."),
+	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+		    "Look for files with symbols relative to this directory"),
+	OPT_STRING(0, "time", &kwork.time_str, "str",
+		   "Time span for analysis (start,stop)"),
+	OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+		   "list of cpus to profile"),
+	OPT_STRING('n', "name", &kwork.profile_name, "name",
+		   "event name to profile"),
+	OPT_STRING('i', "input", &input_name, "file",
+		   "input file name"),
+	OPT_PARENT(kwork_options)
+	};
+	const char *kwork_usage[] = {
+		NULL,
+		NULL
+	};
+	const char * const report_usage[] = {
+		"perf kwork report [<options>]",
+		NULL
+	};
+	const char * const latency_usage[] = {
+		"perf kwork latency [<options>]",
+		NULL
+	};
+	const char * const timehist_usage[] = {
+		"perf kwork timehist [<options>]",
+		NULL
+	};
+	const char *const kwork_subcommands[] = {
+		"record", "report", "latency", "timehist", NULL
+	};
+
+	argc = parse_options_subcommand(argc, argv, kwork_options,
+					kwork_subcommands, kwork_usage,
+					PARSE_OPT_STOP_AT_NON_OPTION);
+	if (!argc)
+		usage_with_options(kwork_usage, kwork_options);
+
+	setup_event_list(&kwork, kwork_options, kwork_usage);
+	sort_dimension__add(&kwork, "id", &kwork.cmp_id);
+
+	if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
+		return perf_kwork__record(&kwork, argc, argv);
+	else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) {
+		kwork.sort_order = default_report_sort_order;
+		if (argc > 1) {
+			argc = parse_options(argc, argv, report_options, report_usage, 0);
+			if (argc)
+				usage_with_options(report_usage, report_options);
+		}
+		kwork.report = KWORK_REPORT_RUNTIME;
+		setup_sorting(&kwork, report_options, report_usage);
+		return perf_kwork__report(&kwork);
+	} else if (strlen(argv[0]) > 2 && strstarts("latency", argv[0])) {
+		kwork.sort_order = default_latency_sort_order;
+		if (argc > 1) {
+			argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+			if (argc)
+				usage_with_options(latency_usage, latency_options);
+		}
+		kwork.report = KWORK_REPORT_LATENCY;
+		setup_sorting(&kwork, latency_options, latency_usage);
+		return perf_kwork__report(&kwork);
+	} else if (strlen(argv[0]) > 2 && strstarts("timehist", argv[0])) {
+		if (argc > 1) {
+			argc = parse_options(argc, argv, timehist_options, timehist_usage, 0);
+			if (argc)
+				usage_with_options(timehist_usage, timehist_options);
+		}
+		kwork.report = KWORK_REPORT_TIMEHIST;
+		return perf_kwork__timehist(&kwork);
+	} else
+		usage_with_options(kwork_usage, kwork_options);
+
+	return 0;
+}