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![Yang Jihong](/assets/img/avatar_default.png)
Implements softirq kwork report function. Test cases: # perf kwork -k softirq rep Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s | (s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s | (s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s | (s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s | ... <SNIP> ... (s)RCU:9 | 0004 | 0.830 ms | 26 | 0.058 ms | 43997.666418 s | 43997.666476 s | (s)TIMER:1 | 0001 | 0.471 ms | 4 | 0.158 ms | 44007.834694 s | 44007.834852 s | (s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s | (s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s | (s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s | (s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s | (s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s | -------------------------------------------------------------------------------------------------------------------------------- # # perf kwork -k softirq rep -S Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s | (s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s | (s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s | (s)SCHED:7 | 0000 | 63.631 ms | 680 | 2.690 ms | 44006.721976 s | 44006.724666 s | ... <SNIP> ... (s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s | (s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s | (s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s | (s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s | (s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s | (s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s | -------------------------------------------------------------------------------------------------------------------------------- Total count : 12748 Total runtime (msec) : 661.433 (0.065% load average) Total time span (msec) : 10176.441 -------------------------------------------------------------------------------------------------------------------------------- # # perf kwork -k softirq rep -s count,max Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s | (s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s | (s)SCHED:7 | 0002 | 50.039 ms | 1731 | 0.074 ms | 44005.009447 s | 44005.009521 s | (s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s | (s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s | ... <SNIP> ... (s)RCU:9 | 0002 | 35.241 ms | 932 | 0.407 ms | 44005.009541 s | 44005.009949 s | (s)RCU:9 | 0000 | 45.710 ms | 702 | 1.144 ms | 44004.787023 s | 44004.788167 s | (s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s | (s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s | (s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s | -------------------------------------------------------------------------------------------------------------------------------- Committer testing: # perf kwork -k softirq report -C 2 -s count,max Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end | -------------------------------------------------------------------------------------------------------------------------------- (s)SCHED:7 | 0002 | 0.980 ms | 159 | 0.024 ms | 26035.571037 s | 26035.571061 s | (s)RCU:9 | 0002 | 0.124 ms | 88 | 0.021 ms | 26035.177050 s | 26035.177071 s | (s)TIMER:1 | 0002 | 0.122 ms | 56 | 0.007 ms | 26035.468045 s | 26035.468052 s | -------------------------------------------------------------------------------------------------------------------------------- # Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Clarke <pc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20220709015033.38326-9-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1214 lines
29 KiB
C
1214 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* builtin-kwork.c
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*
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* Copyright (c) 2022 Huawei Inc, Yang Jihong <yangjihong1@huawei.com>
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*/
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#include "builtin.h"
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#include "util/data.h"
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#include "util/kwork.h"
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#include "util/debug.h"
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#include "util/symbol.h"
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#include "util/thread.h"
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#include "util/string2.h"
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#include "util/callchain.h"
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#include "util/evsel_fprintf.h"
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#include <subcmd/pager.h>
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#include <subcmd/parse-options.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <linux/err.h>
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#include <linux/time64.h>
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#include <linux/zalloc.h>
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/*
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* report header elements width
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*/
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#define PRINT_CPU_WIDTH 4
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#define PRINT_COUNT_WIDTH 9
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#define PRINT_RUNTIME_WIDTH 10
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#define PRINT_TIMESTAMP_WIDTH 17
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#define PRINT_KWORK_NAME_WIDTH 30
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#define RPINT_DECIMAL_WIDTH 3
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#define PRINT_TIME_UNIT_SEC_WIDTH 2
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#define PRINT_TIME_UNIT_MESC_WIDTH 3
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#define PRINT_RUNTIME_HEADER_WIDTH (PRINT_RUNTIME_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
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#define PRINT_TIMESTAMP_HEADER_WIDTH (PRINT_TIMESTAMP_WIDTH + PRINT_TIME_UNIT_SEC_WIDTH)
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struct sort_dimension {
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const char *name;
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int (*cmp)(struct kwork_work *l, struct kwork_work *r);
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struct list_head list;
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};
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static int id_cmp(struct kwork_work *l, struct kwork_work *r)
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{
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if (l->cpu > r->cpu)
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return 1;
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if (l->cpu < r->cpu)
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return -1;
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if (l->id > r->id)
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return 1;
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if (l->id < r->id)
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return -1;
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return 0;
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}
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static int count_cmp(struct kwork_work *l, struct kwork_work *r)
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{
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if (l->nr_atoms > r->nr_atoms)
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return 1;
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if (l->nr_atoms < r->nr_atoms)
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return -1;
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return 0;
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}
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static int runtime_cmp(struct kwork_work *l, struct kwork_work *r)
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{
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if (l->total_runtime > r->total_runtime)
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return 1;
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if (l->total_runtime < r->total_runtime)
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return -1;
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return 0;
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}
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static int max_runtime_cmp(struct kwork_work *l, struct kwork_work *r)
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{
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if (l->max_runtime > r->max_runtime)
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return 1;
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if (l->max_runtime < r->max_runtime)
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return -1;
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return 0;
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}
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static int sort_dimension__add(struct perf_kwork *kwork __maybe_unused,
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const char *tok, struct list_head *list)
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{
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size_t i;
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static struct sort_dimension max_sort_dimension = {
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.name = "max",
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.cmp = max_runtime_cmp,
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};
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static struct sort_dimension id_sort_dimension = {
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.name = "id",
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.cmp = id_cmp,
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};
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static struct sort_dimension runtime_sort_dimension = {
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.name = "runtime",
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.cmp = runtime_cmp,
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};
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static struct sort_dimension count_sort_dimension = {
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.name = "count",
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.cmp = count_cmp,
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};
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struct sort_dimension *available_sorts[] = {
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&id_sort_dimension,
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&max_sort_dimension,
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&count_sort_dimension,
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&runtime_sort_dimension,
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};
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for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
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if (!strcmp(available_sorts[i]->name, tok)) {
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list_add_tail(&available_sorts[i]->list, list);
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return 0;
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}
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}
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return -1;
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}
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static void setup_sorting(struct perf_kwork *kwork,
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const struct option *options,
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const char * const usage_msg[])
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{
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char *tmp, *tok, *str = strdup(kwork->sort_order);
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for (tok = strtok_r(str, ", ", &tmp);
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tok; tok = strtok_r(NULL, ", ", &tmp)) {
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if (sort_dimension__add(kwork, tok, &kwork->sort_list) < 0)
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usage_with_options_msg(usage_msg, options,
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"Unknown --sort key: `%s'", tok);
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}
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pr_debug("Sort order: %s\n", kwork->sort_order);
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free(str);
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}
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static struct kwork_atom *atom_new(struct perf_kwork *kwork,
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struct perf_sample *sample)
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{
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unsigned long i;
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struct kwork_atom_page *page;
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struct kwork_atom *atom = NULL;
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list_for_each_entry(page, &kwork->atom_page_list, list) {
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if (!bitmap_full(page->bitmap, NR_ATOM_PER_PAGE)) {
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i = find_first_zero_bit(page->bitmap, NR_ATOM_PER_PAGE);
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BUG_ON(i >= NR_ATOM_PER_PAGE);
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atom = &page->atoms[i];
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goto found_atom;
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}
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}
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/*
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* new page
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*/
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page = zalloc(sizeof(*page));
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if (page == NULL) {
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pr_err("Failed to zalloc kwork atom page\n");
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return NULL;
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}
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i = 0;
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atom = &page->atoms[0];
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list_add_tail(&page->list, &kwork->atom_page_list);
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found_atom:
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set_bit(i, page->bitmap);
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atom->time = sample->time;
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atom->prev = NULL;
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atom->page_addr = page;
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atom->bit_inpage = i;
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return atom;
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}
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static void atom_free(struct kwork_atom *atom)
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{
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if (atom->prev != NULL)
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atom_free(atom->prev);
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clear_bit(atom->bit_inpage,
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((struct kwork_atom_page *)atom->page_addr)->bitmap);
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}
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static void atom_del(struct kwork_atom *atom)
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{
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list_del(&atom->list);
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atom_free(atom);
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}
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static int work_cmp(struct list_head *list,
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struct kwork_work *l, struct kwork_work *r)
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{
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int ret = 0;
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struct sort_dimension *sort;
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BUG_ON(list_empty(list));
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list_for_each_entry(sort, list, list) {
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ret = sort->cmp(l, r);
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if (ret)
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return ret;
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}
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return ret;
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}
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static struct kwork_work *work_search(struct rb_root_cached *root,
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struct kwork_work *key,
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struct list_head *sort_list)
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{
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int cmp;
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struct kwork_work *work;
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struct rb_node *node = root->rb_root.rb_node;
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while (node) {
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work = container_of(node, struct kwork_work, node);
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cmp = work_cmp(sort_list, key, work);
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if (cmp > 0)
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node = node->rb_left;
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else if (cmp < 0)
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node = node->rb_right;
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else {
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if (work->name == NULL)
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work->name = key->name;
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return work;
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}
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}
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return NULL;
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}
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static void work_insert(struct rb_root_cached *root,
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struct kwork_work *key, struct list_head *sort_list)
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{
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int cmp;
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bool leftmost = true;
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struct kwork_work *cur;
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struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
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while (*new) {
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cur = container_of(*new, struct kwork_work, node);
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parent = *new;
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cmp = work_cmp(sort_list, key, cur);
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if (cmp > 0)
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new = &((*new)->rb_left);
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else {
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new = &((*new)->rb_right);
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leftmost = false;
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}
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}
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rb_link_node(&key->node, parent, new);
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rb_insert_color_cached(&key->node, root, leftmost);
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}
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static struct kwork_work *work_new(struct kwork_work *key)
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{
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int i;
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struct kwork_work *work = zalloc(sizeof(*work));
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if (work == NULL) {
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pr_err("Failed to zalloc kwork work\n");
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return NULL;
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}
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for (i = 0; i < KWORK_TRACE_MAX; i++)
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INIT_LIST_HEAD(&work->atom_list[i]);
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work->id = key->id;
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work->cpu = key->cpu;
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work->name = key->name;
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work->class = key->class;
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return work;
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}
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static struct kwork_work *work_findnew(struct rb_root_cached *root,
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struct kwork_work *key,
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struct list_head *sort_list)
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{
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struct kwork_work *work = NULL;
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work = work_search(root, key, sort_list);
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if (work != NULL)
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return work;
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work = work_new(key);
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if (work == NULL)
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return NULL;
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work_insert(root, work, sort_list);
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return work;
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}
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static void profile_update_timespan(struct perf_kwork *kwork,
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struct perf_sample *sample)
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{
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if (!kwork->summary)
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return;
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if ((kwork->timestart == 0) || (kwork->timestart > sample->time))
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kwork->timestart = sample->time;
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if (kwork->timeend < sample->time)
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kwork->timeend = sample->time;
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}
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static bool profile_event_match(struct perf_kwork *kwork,
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struct kwork_work *work,
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struct perf_sample *sample)
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{
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int cpu = work->cpu;
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u64 time = sample->time;
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struct perf_time_interval *ptime = &kwork->ptime;
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if ((kwork->cpu_list != NULL) && !test_bit(cpu, kwork->cpu_bitmap))
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return false;
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if (((ptime->start != 0) && (ptime->start > time)) ||
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((ptime->end != 0) && (ptime->end < time)))
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return false;
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if ((kwork->profile_name != NULL) &&
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(work->name != NULL) &&
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(strcmp(work->name, kwork->profile_name) != 0))
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return false;
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profile_update_timespan(kwork, sample);
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return true;
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}
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static int work_push_atom(struct perf_kwork *kwork,
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struct kwork_class *class,
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enum kwork_trace_type src_type,
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enum kwork_trace_type dst_type,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine,
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struct kwork_work **ret_work)
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{
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struct kwork_atom *atom, *dst_atom;
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struct kwork_work *work, key;
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BUG_ON(class->work_init == NULL);
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class->work_init(class, &key, evsel, sample, machine);
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atom = atom_new(kwork, sample);
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if (atom == NULL)
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return -1;
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work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
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if (work == NULL) {
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free(atom);
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return -1;
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}
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if (!profile_event_match(kwork, work, sample))
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return 0;
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if (dst_type < KWORK_TRACE_MAX) {
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dst_atom = list_last_entry_or_null(&work->atom_list[dst_type],
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struct kwork_atom, list);
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if (dst_atom != NULL) {
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atom->prev = dst_atom;
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list_del(&dst_atom->list);
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}
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}
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if (ret_work != NULL)
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*ret_work = work;
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list_add_tail(&atom->list, &work->atom_list[src_type]);
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return 0;
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}
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static struct kwork_atom *work_pop_atom(struct perf_kwork *kwork,
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struct kwork_class *class,
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enum kwork_trace_type src_type,
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enum kwork_trace_type dst_type,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine,
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struct kwork_work **ret_work)
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{
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struct kwork_atom *atom, *src_atom;
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struct kwork_work *work, key;
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BUG_ON(class->work_init == NULL);
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class->work_init(class, &key, evsel, sample, machine);
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work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
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if (ret_work != NULL)
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*ret_work = work;
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if (work == NULL)
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return NULL;
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if (!profile_event_match(kwork, work, sample))
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return NULL;
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atom = list_last_entry_or_null(&work->atom_list[dst_type],
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struct kwork_atom, list);
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if (atom != NULL)
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return atom;
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src_atom = atom_new(kwork, sample);
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if (src_atom != NULL)
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list_add_tail(&src_atom->list, &work->atom_list[src_type]);
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else {
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if (ret_work != NULL)
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*ret_work = NULL;
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}
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return NULL;
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}
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|
|
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 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_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", NULL, },
|
|
{ "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,
|
|
};
|
|
|
|
const struct evsel_str_handler workqueue_tp_handlers[] = {
|
|
{ "workqueue:workqueue_activate_work", NULL, },
|
|
{ "workqueue:workqueue_execute_start", NULL, },
|
|
{ "workqueue:workqueue_execute_end", NULL, },
|
|
};
|
|
|
|
static struct kwork_class kwork_workqueue = {
|
|
.name = "workqueue",
|
|
.type = KWORK_CLASS_WORKQUEUE,
|
|
.nr_tracepoints = 3,
|
|
.tp_handlers = workqueue_tp_handlers,
|
|
};
|
|
|
|
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];
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
printf("\n");
|
|
print_separator(ret);
|
|
return ret;
|
|
}
|
|
|
|
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_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 kwork_class *class;
|
|
|
|
static struct trace_kwork_handler report_ops = {
|
|
.entry_event = report_entry_event,
|
|
.exit_event = report_exit_event,
|
|
};
|
|
|
|
switch (kwork->report) {
|
|
case KWORK_REPORT_RUNTIME:
|
|
kwork->tp_handler = &report_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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
static int perf_kwork__report(struct perf_kwork *kwork)
|
|
{
|
|
int ret;
|
|
struct rb_node *next;
|
|
struct kwork_work *work;
|
|
|
|
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 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,
|
|
},
|
|
.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,
|
|
.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";
|
|
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"),
|
|
OPT_PARENT(kwork_options)
|
|
};
|
|
const char *kwork_usage[] = {
|
|
NULL,
|
|
NULL
|
|
};
|
|
const char * const report_usage[] = {
|
|
"perf kwork report [<options>]",
|
|
NULL
|
|
};
|
|
const char *const kwork_subcommands[] = {
|
|
"record", "report", 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
|
|
usage_with_options(kwork_usage, kwork_options);
|
|
|
|
return 0;
|
|
}
|