summaryrefslogtreecommitdiff
path: root/tools/perf/tests/parse-metric.c
blob: 574b7e4efd3a5a64b31ebae700909ddebe22eb1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <string.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
#include "metricgroup.h"
#include "tests.h"
#include "pmu-events/pmu-events.h"
#include "evlist.h"
#include "rblist.h"
#include "debug.h"
#include "expr.h"
#include "stat.h"
#include "pmu.h"

static struct pmu_event pme_test[] = {
{
	.metric_expr	= "inst_retired.any / cpu_clk_unhalted.thread",
	.metric_name	= "IPC",
	.metric_group	= "group1",
},
{
	.metric_expr	= "idq_uops_not_delivered.core / (4 * (( ( cpu_clk_unhalted.thread / 2 ) * "
			  "( 1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk ) )))",
	.metric_name	= "Frontend_Bound_SMT",
},
{
	.metric_expr	= "l1d\\-loads\\-misses / inst_retired.any",
	.metric_name	= "dcache_miss_cpi",
},
{
	.metric_expr	= "l1i\\-loads\\-misses / inst_retired.any",
	.metric_name	= "icache_miss_cycles",
},
{
	.metric_expr	= "(dcache_miss_cpi + icache_miss_cycles)",
	.metric_name	= "cache_miss_cycles",
	.metric_group	= "group1",
},
{
	.metric_expr	= "l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit",
	.metric_name	= "DCache_L2_All_Hits",
},
{
	.metric_expr	= "max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + "
			  "l2_rqsts.pf_miss + l2_rqsts.rfo_miss",
	.metric_name	= "DCache_L2_All_Miss",
},
{
	.metric_expr	= "dcache_l2_all_hits + dcache_l2_all_miss",
	.metric_name	= "DCache_L2_All",
},
{
	.metric_expr	= "d_ratio(dcache_l2_all_hits, dcache_l2_all)",
	.metric_name	= "DCache_L2_Hits",
},
{
	.metric_expr	= "d_ratio(dcache_l2_all_miss, dcache_l2_all)",
	.metric_name	= "DCache_L2_Misses",
},
{
	.metric_expr	= "ipc + m2",
	.metric_name	= "M1",
},
{
	.metric_expr	= "ipc + m1",
	.metric_name	= "M2",
},
{
	.metric_expr	= "1/m3",
	.metric_name	= "M3",
},
{
	.metric_expr	= "64 * l1d.replacement / 1000000000 / duration_time",
	.metric_name	= "L1D_Cache_Fill_BW",
},
{
	.name	= NULL,
}
};

static const struct pmu_events_map map = {
	.cpuid		= "test",
	.version	= "1",
	.type		= "core",
	.table		= pme_test,
};

struct value {
	const char	*event;
	u64		 val;
};

static u64 find_value(const char *name, struct value *values)
{
	struct value *v = values;

	while (v->event) {
		if (!strcmp(name, v->event))
			return v->val;
		v++;
	}
	return 0;
}

static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist,
			      struct value *vals)
{
	struct evsel *evsel;
	u64 count;

	evlist__for_each_entry(evlist, evsel) {
		count = find_value(evsel->name, vals);
		perf_stat__update_shadow_stats(evsel, count, 0, st);
		if (!strcmp(evsel->name, "duration_time"))
			update_stats(&walltime_nsecs_stats, count);
	}
}

static double compute_single(struct rblist *metric_events, struct evlist *evlist,
			     struct runtime_stat *st, const char *name)
{
	struct metric_expr *mexp;
	struct metric_event *me;
	struct evsel *evsel;

	evlist__for_each_entry(evlist, evsel) {
		me = metricgroup__lookup(metric_events, evsel, false);
		if (me != NULL) {
			list_for_each_entry (mexp, &me->head, nd) {
				if (strcmp(mexp->metric_name, name))
					continue;
				return test_generic_metric(mexp, 0, st);
			}
		}
	}
	return 0.;
}

static int __compute_metric(const char *name, struct value *vals,
			    const char *name1, double *ratio1,
			    const char *name2, double *ratio2)
{
	struct rblist metric_events = {
		.nr_entries = 0,
	};
	struct perf_cpu_map *cpus;
	struct runtime_stat st;
	struct evlist *evlist;
	int err;

	/*
	 * We need to prepare evlist for stat mode running on CPU 0
	 * because that's where all the stats are going to be created.
	 */
	evlist = evlist__new();
	if (!evlist)
		return -ENOMEM;

	cpus = perf_cpu_map__new("0");
	if (!cpus) {
		evlist__delete(evlist);
		return -ENOMEM;
	}

	perf_evlist__set_maps(&evlist->core, cpus, NULL);
	runtime_stat__init(&st);

	/* Parse the metric into metric_events list. */
	err = metricgroup__parse_groups_test(evlist, &map, name,
					     false, false,
					     &metric_events);
	if (err)
		goto out;

	err = evlist__alloc_stats(evlist, false);
	if (err)
		goto out;

	/* Load the runtime stats with given numbers for events. */
	load_runtime_stat(&st, evlist, vals);

	/* And execute the metric */
	if (name1 && ratio1)
		*ratio1 = compute_single(&metric_events, evlist, &st, name1);
	if (name2 && ratio2)
		*ratio2 = compute_single(&metric_events, evlist, &st, name2);

out:
	/* ... cleanup. */
	metricgroup__rblist_exit(&metric_events);
	runtime_stat__exit(&st);
	evlist__free_stats(evlist);
	perf_cpu_map__put(cpus);
	evlist__delete(evlist);
	return err;
}

static int compute_metric(const char *name, struct value *vals, double *ratio)
{
	return __compute_metric(name, vals, name, ratio, NULL, NULL);
}

static int compute_metric_group(const char *name, struct value *vals,
				const char *name1, double *ratio1,
				const char *name2, double *ratio2)
{
	return __compute_metric(name, vals, name1, ratio1, name2, ratio2);
}

static int test_ipc(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "inst_retired.any",        .val = 300 },
		{ .event = "cpu_clk_unhalted.thread", .val = 200 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("IPC", vals, &ratio) == 0);

	TEST_ASSERT_VAL("IPC failed, wrong ratio",
			ratio == 1.5);
	return 0;
}

static int test_frontend(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "idq_uops_not_delivered.core",        .val = 300 },
		{ .event = "cpu_clk_unhalted.thread",            .val = 200 },
		{ .event = "cpu_clk_unhalted.one_thread_active", .val = 400 },
		{ .event = "cpu_clk_unhalted.ref_xclk",          .val = 600 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0);

	TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio",
			ratio == 0.45);
	return 0;
}

static int test_cache_miss_cycles(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "l1d-loads-misses",  .val = 300 },
		{ .event = "l1i-loads-misses",  .val = 200 },
		{ .event = "inst_retired.any",  .val = 400 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("cache_miss_cycles", vals, &ratio) == 0);

	TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
			ratio == 1.25);
	return 0;
}


/*
 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
 *                      l2_rqsts.pf_miss + l2_rqsts.rfo_miss
 * DCache_L2_All      = dcache_l2_all_hits + dcache_l2_all_miss
 * DCache_L2_Hits     = d_ratio(dcache_l2_all_hits, dcache_l2_all)
 * DCache_L2_Misses   = d_ratio(dcache_l2_all_miss, dcache_l2_all)
 *
 * l2_rqsts.demand_data_rd_hit = 100
 * l2_rqsts.pf_hit             = 200
 * l2_rqsts.rfo_hi             = 300
 * l2_rqsts.all_demand_data_rd = 400
 * l2_rqsts.pf_miss            = 500
 * l2_rqsts.rfo_miss           = 600
 *
 * DCache_L2_All_Hits = 600
 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
 * DCache_L2_All      = 600 + 1400  = 2000
 * DCache_L2_Hits     = 600 / 2000  = 0.3
 * DCache_L2_Misses   = 1400 / 2000 = 0.7
 */
static int test_dcache_l2(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
		{ .event = "l2_rqsts.pf_hit",             .val = 200 },
		{ .event = "l2_rqsts.rfo_hit",            .val = 300 },
		{ .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
		{ .event = "l2_rqsts.pf_miss",            .val = 500 },
		{ .event = "l2_rqsts.rfo_miss",           .val = 600 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("DCache_L2_Hits", vals, &ratio) == 0);

	TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
			ratio == 0.3);

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("DCache_L2_Misses", vals, &ratio) == 0);

	TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
			ratio == 0.7);
	return 0;
}

static int test_recursion_fail(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "inst_retired.any",        .val = 300 },
		{ .event = "cpu_clk_unhalted.thread", .val = 200 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to find recursion",
			compute_metric("M1", vals, &ratio) == -1);

	TEST_ASSERT_VAL("failed to find recursion",
			compute_metric("M3", vals, &ratio) == -1);
	return 0;
}

static int test_memory_bandwidth(void)
{
	double ratio;
	struct value vals[] = {
		{ .event = "l1d.replacement", .val = 4000000 },
		{ .event = "duration_time",  .val = 200000000 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to compute metric",
			compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0);
	TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio",
			1.28 == ratio);

	return 0;
}

static int test_metric_group(void)
{
	double ratio1, ratio2;
	struct value vals[] = {
		{ .event = "cpu_clk_unhalted.thread", .val = 200 },
		{ .event = "l1d-loads-misses",        .val = 300 },
		{ .event = "l1i-loads-misses",        .val = 200 },
		{ .event = "inst_retired.any",        .val = 400 },
		{ .event = NULL, },
	};

	TEST_ASSERT_VAL("failed to find recursion",
			compute_metric_group("group1", vals,
					     "IPC", &ratio1,
					     "cache_miss_cycles", &ratio2) == 0);

	TEST_ASSERT_VAL("group IPC failed, wrong ratio",
			ratio1 == 2.0);

	TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio",
			ratio2 == 1.25);
	return 0;
}

static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
	TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
	TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
	TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
	TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0);
	TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0);

	if (!perf_pmu__has_hybrid()) {
		TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
		TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);
	}
	return 0;
}

DEFINE_SUITE("Parse and process metrics", parse_metric);