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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/compiler.h>
3#include <string.h>
4#include <perf/cpumap.h>
5#include <perf/evlist.h>
6#include "metricgroup.h"
7#include "tests.h"
8#include "pmu-events/pmu-events.h"
9#include "evlist.h"
10#include "rblist.h"
11#include "debug.h"
12#include "expr.h"
13#include "stat.h"
14#include <perf/cpumap.h>
15#include <perf/evlist.h>
16
17static struct pmu_event pme_test[] = {
18{
19 .metric_expr = "inst_retired.any / cpu_clk_unhalted.thread",
20 .metric_name = "IPC",
21 .metric_group = "group1",
22},
23{
24 .metric_expr = "idq_uops_not_delivered.core / (4 * (( ( cpu_clk_unhalted.thread / 2 ) * "
25 "( 1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk ) )))",
26 .metric_name = "Frontend_Bound_SMT",
27},
28{
29 .metric_expr = "l1d\\-loads\\-misses / inst_retired.any",
30 .metric_name = "dcache_miss_cpi",
31},
32{
33 .metric_expr = "l1i\\-loads\\-misses / inst_retired.any",
34 .metric_name = "icache_miss_cycles",
35},
36{
37 .metric_expr = "(dcache_miss_cpi + icache_miss_cycles)",
38 .metric_name = "cache_miss_cycles",
39 .metric_group = "group1",
40},
41{
42 .metric_expr = "l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit",
43 .metric_name = "DCache_L2_All_Hits",
44},
45{
46 .metric_expr = "max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + "
47 "l2_rqsts.pf_miss + l2_rqsts.rfo_miss",
48 .metric_name = "DCache_L2_All_Miss",
49},
50{
51 .metric_expr = "dcache_l2_all_hits + dcache_l2_all_miss",
52 .metric_name = "DCache_L2_All",
53},
54{
55 .metric_expr = "d_ratio(dcache_l2_all_hits, dcache_l2_all)",
56 .metric_name = "DCache_L2_Hits",
57},
58{
59 .metric_expr = "d_ratio(dcache_l2_all_miss, dcache_l2_all)",
60 .metric_name = "DCache_L2_Misses",
61},
62{
63 .metric_expr = "ipc + m2",
64 .metric_name = "M1",
65},
66{
67 .metric_expr = "ipc + m1",
68 .metric_name = "M2",
69},
70{
71 .metric_expr = "1/m3",
72 .metric_name = "M3",
73},
74{
75 .name = NULL,
76}
77};
78
79static struct pmu_events_map map = {
80 .cpuid = "test",
81 .version = "1",
82 .type = "core",
83 .table = pme_test,
84};
85
86struct value {
87 const char *event;
88 u64 val;
89};
90
91static u64 find_value(const char *name, struct value *values)
92{
93 struct value *v = values;
94
95 while (v->event) {
96 if (!strcmp(name, v->event))
97 return v->val;
98 v++;
99 };
100 return 0;
101}
102
103static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist,
104 struct value *vals)
105{
106 struct evsel *evsel;
107 u64 count;
108
109 evlist__for_each_entry(evlist, evsel) {
110 count = find_value(evsel->name, vals);
111 perf_stat__update_shadow_stats(evsel, count, 0, st);
112 }
113}
114
115static double compute_single(struct rblist *metric_events, struct evlist *evlist,
116 struct runtime_stat *st, const char *name)
117{
118 struct metric_expr *mexp;
119 struct metric_event *me;
120 struct evsel *evsel;
121
122 evlist__for_each_entry(evlist, evsel) {
123 me = metricgroup__lookup(metric_events, evsel, false);
124 if (me != NULL) {
125 list_for_each_entry (mexp, &me->head, nd) {
126 if (strcmp(mexp->metric_name, name))
127 continue;
128 return test_generic_metric(mexp, 0, st);
129 }
130 }
131 }
132 return 0.;
133}
134
135static int __compute_metric(const char *name, struct value *vals,
136 const char *name1, double *ratio1,
137 const char *name2, double *ratio2)
138{
139 struct rblist metric_events = {
140 .nr_entries = 0,
141 };
142 struct perf_cpu_map *cpus;
143 struct runtime_stat st;
144 struct evlist *evlist;
145 int err;
146
147 /*
148 * We need to prepare evlist for stat mode running on CPU 0
149 * because that's where all the stats are going to be created.
150 */
151 evlist = evlist__new();
152 if (!evlist)
153 return -ENOMEM;
154
155 cpus = perf_cpu_map__new("0");
156 if (!cpus) {
157 evlist__delete(evlist);
158 return -ENOMEM;
159 }
160
161 perf_evlist__set_maps(&evlist->core, cpus, NULL);
162
163 /* Parse the metric into metric_events list. */
164 err = metricgroup__parse_groups_test(evlist, &map, name,
165 false, false,
166 &metric_events);
167 if (err)
168 goto out;
169
170 err = perf_evlist__alloc_stats(evlist, false);
171 if (err)
172 goto out;
173
174 /* Load the runtime stats with given numbers for events. */
175 runtime_stat__init(&st);
176 load_runtime_stat(&st, evlist, vals);
177
178 /* And execute the metric */
179 if (name1 && ratio1)
180 *ratio1 = compute_single(&metric_events, evlist, &st, name1);
181 if (name2 && ratio2)
182 *ratio2 = compute_single(&metric_events, evlist, &st, name2);
183
184out:
185 /* ... clenup. */
186 metricgroup__rblist_exit(&metric_events);
187 runtime_stat__exit(&st);
188 perf_evlist__free_stats(evlist);
189 perf_cpu_map__put(cpus);
190 evlist__delete(evlist);
191 return err;
192}
193
194static int compute_metric(const char *name, struct value *vals, double *ratio)
195{
196 return __compute_metric(name, vals, name, ratio, NULL, NULL);
197}
198
199static int compute_metric_group(const char *name, struct value *vals,
200 const char *name1, double *ratio1,
201 const char *name2, double *ratio2)
202{
203 return __compute_metric(name, vals, name1, ratio1, name2, ratio2);
204}
205
206static int test_ipc(void)
207{
208 double ratio;
209 struct value vals[] = {
210 { .event = "inst_retired.any", .val = 300 },
211 { .event = "cpu_clk_unhalted.thread", .val = 200 },
212 { .event = NULL, },
213 };
214
215 TEST_ASSERT_VAL("failed to compute metric",
216 compute_metric("IPC", vals, &ratio) == 0);
217
218 TEST_ASSERT_VAL("IPC failed, wrong ratio",
219 ratio == 1.5);
220 return 0;
221}
222
223static int test_frontend(void)
224{
225 double ratio;
226 struct value vals[] = {
227 { .event = "idq_uops_not_delivered.core", .val = 300 },
228 { .event = "cpu_clk_unhalted.thread", .val = 200 },
229 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 },
230 { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 },
231 { .event = NULL, },
232 };
233
234 TEST_ASSERT_VAL("failed to compute metric",
235 compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0);
236
237 TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio",
238 ratio == 0.45);
239 return 0;
240}
241
242static int test_cache_miss_cycles(void)
243{
244 double ratio;
245 struct value vals[] = {
246 { .event = "l1d-loads-misses", .val = 300 },
247 { .event = "l1i-loads-misses", .val = 200 },
248 { .event = "inst_retired.any", .val = 400 },
249 { .event = NULL, },
250 };
251
252 TEST_ASSERT_VAL("failed to compute metric",
253 compute_metric("cache_miss_cycles", vals, &ratio) == 0);
254
255 TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
256 ratio == 1.25);
257 return 0;
258}
259
260
261/*
262 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
263 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
264 * l2_rqsts.pf_miss + l2_rqsts.rfo_miss
265 * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss
266 * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all)
267 * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all)
268 *
269 * l2_rqsts.demand_data_rd_hit = 100
270 * l2_rqsts.pf_hit = 200
271 * l2_rqsts.rfo_hi = 300
272 * l2_rqsts.all_demand_data_rd = 400
273 * l2_rqsts.pf_miss = 500
274 * l2_rqsts.rfo_miss = 600
275 *
276 * DCache_L2_All_Hits = 600
277 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
278 * DCache_L2_All = 600 + 1400 = 2000
279 * DCache_L2_Hits = 600 / 2000 = 0.3
280 * DCache_L2_Misses = 1400 / 2000 = 0.7
281 */
282static int test_dcache_l2(void)
283{
284 double ratio;
285 struct value vals[] = {
286 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
287 { .event = "l2_rqsts.pf_hit", .val = 200 },
288 { .event = "l2_rqsts.rfo_hit", .val = 300 },
289 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
290 { .event = "l2_rqsts.pf_miss", .val = 500 },
291 { .event = "l2_rqsts.rfo_miss", .val = 600 },
292 { .event = NULL, },
293 };
294
295 TEST_ASSERT_VAL("failed to compute metric",
296 compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
297
298 TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
299 ratio == 0.3);
300
301 TEST_ASSERT_VAL("failed to compute metric",
302 compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
303
304 TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
305 ratio == 0.7);
306 return 0;
307}
308
309static int test_recursion_fail(void)
310{
311 double ratio;
312 struct value vals[] = {
313 { .event = "inst_retired.any", .val = 300 },
314 { .event = "cpu_clk_unhalted.thread", .val = 200 },
315 { .event = NULL, },
316 };
317
318 TEST_ASSERT_VAL("failed to find recursion",
319 compute_metric("M1", vals, &ratio) == -1);
320
321 TEST_ASSERT_VAL("failed to find recursion",
322 compute_metric("M3", vals, &ratio) == -1);
323 return 0;
324}
325
326static int test_metric_group(void)
327{
328 double ratio1, ratio2;
329 struct value vals[] = {
330 { .event = "cpu_clk_unhalted.thread", .val = 200 },
331 { .event = "l1d-loads-misses", .val = 300 },
332 { .event = "l1i-loads-misses", .val = 200 },
333 { .event = "inst_retired.any", .val = 400 },
334 { .event = NULL, },
335 };
336
337 TEST_ASSERT_VAL("failed to find recursion",
338 compute_metric_group("group1", vals,
339 "IPC", &ratio1,
340 "cache_miss_cycles", &ratio2) == 0);
341
342 TEST_ASSERT_VAL("group IPC failed, wrong ratio",
343 ratio1 == 2.0);
344
345 TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio",
346 ratio2 == 1.25);
347 return 0;
348}
349
350int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unused)
351{
352 TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
353 TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
354 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
355 TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
356 TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0);
357 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);
358 return 0;
359}