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 "pmus.h"
15
16 struct value {
17 const char *event;
18 u64 val;
19 };
20
21 static u64 find_value(const char *name, struct value *values)
22 {
23 struct value *v = values;
24
25 while (v->event) {
26 if (!strcmp(name, v->event))
27 return v->val;
28 v++;
29 }
30 return 0;
31 }
32
33 static void load_runtime_stat(struct evlist *evlist, struct value *vals)
34 {
35 struct evsel *evsel;
36 u64 count;
37
38 evlist__alloc_aggr_stats(evlist, 1);
39 evlist__for_each_entry(evlist, evsel) {
40 count = find_value(evsel->name, vals);
41 evsel->supported = true;
42 evsel->stats->aggr->counts.val = count;
43 if (evsel__name_is(evsel, "duration_time"))
44 update_stats(&walltime_nsecs_stats, count);
45 }
46 }
47
48 static double compute_single(struct rblist *metric_events, struct evlist *evlist,
49 const char *name)
50 {
51 struct metric_expr *mexp;
52 struct metric_event *me;
53 struct evsel *evsel;
54
55 evlist__for_each_entry(evlist, evsel) {
56 me = metricgroup__lookup(metric_events, evsel, false);
57 if (me != NULL) {
58 list_for_each_entry (mexp, &me->head, nd) {
59 if (strcmp(mexp->metric_name, name))
60 continue;
61 return test_generic_metric(mexp, 0);
62 }
63 }
64 }
65 return 0.;
66 }
67
68 static int __compute_metric(const char *name, struct value *vals,
69 const char *name1, double *ratio1,
70 const char *name2, double *ratio2)
71 {
72 struct rblist metric_events = {
73 .nr_entries = 0,
74 };
75 const struct pmu_metrics_table *pme_test;
76 struct perf_cpu_map *cpus;
77 struct evlist *evlist;
78 int err;
79
80 /*
81 * We need to prepare evlist for stat mode running on CPU 0
82 * because that's where all the stats are going to be created.
83 */
84 evlist = evlist__new();
85 if (!evlist)
86 return -ENOMEM;
87
88 cpus = perf_cpu_map__new("");
89 if (!cpus) {
90 evlist__delete(evlist);
91 return -ENOMEM;
92 }
93
94 perf_evlist__set_maps(&evlist->core, cpus, NULL);
95
96 /* Parse the metric into metric_events list. */
97 pme_test = find_core_metrics_table("testarch", "testcpu");
98 err = metricgroup__parse_groups_test(evlist, pme_test, name,
99 &metric_events);
100 if (err)
101 goto out;
102
103 err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false);
104 if (err)
105 goto out;
106
107 /* Load the runtime stats with given numbers for events. */
108 load_runtime_stat(evlist, vals);
109
110 /* And execute the metric */
111 if (name1 && ratio1)
112 *ratio1 = compute_single(&metric_events, evlist, name1);
113 if (name2 && ratio2)
114 *ratio2 = compute_single(&metric_events, evlist, name2);
115
116 out:
117 /* ... cleanup. */
118 metricgroup__rblist_exit(&metric_events);
119 evlist__free_stats(evlist);
120 perf_cpu_map__put(cpus);
121 evlist__delete(evlist);
122 return err;
123 }
124
125 static int compute_metric(const char *name, struct value *vals, double *ratio)
126 {
127 return __compute_metric(name, vals, name, ratio, NULL, NULL);
128 }
129
130 static int compute_metric_group(const char *name, struct value *vals,
131 const char *name1, double *ratio1,
132 const char *name2, double *ratio2)
133 {
134 return __compute_metric(name, vals, name1, ratio1, name2, ratio2);
135 }
136
137 static int test_ipc(void)
138 {
139 double ratio;
140 struct value vals[] = {
141 { .event = "inst_retired.any", .val = 300 },
142 { .event = "cpu_clk_unhalted.thread", .val = 200 },
143 { .event = NULL, },
144 };
145
146 TEST_ASSERT_VAL("failed to compute metric",
147 compute_metric("IPC", vals, &ratio) == 0);
148
149 TEST_ASSERT_VAL("IPC failed, wrong ratio",
150 ratio == 1.5);
151 return 0;
152 }
153
154 static int test_frontend(void)
155 {
156 double ratio;
157 struct value vals[] = {
158 { .event = "idq_uops_not_delivered.core", .val = 300 },
159 { .event = "cpu_clk_unhalted.thread", .val = 200 },
160 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 },
161 { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 },
162 { .event = NULL, },
163 };
164
165 TEST_ASSERT_VAL("failed to compute metric",
166 compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0);
167
168 TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio",
169 ratio == 0.45);
170 return 0;
171 }
172
173 static int test_cache_miss_cycles(void)
174 {
175 double ratio;
176 struct value vals[] = {
177 { .event = "l1d-loads-misses", .val = 300 },
178 { .event = "l1i-loads-misses", .val = 200 },
179 { .event = "inst_retired.any", .val = 400 },
180 { .event = NULL, },
181 };
182
183 TEST_ASSERT_VAL("failed to compute metric",
184 compute_metric("cache_miss_cycles", vals, &ratio) == 0);
185
186 TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
187 ratio == 1.25);
188 return 0;
189 }
190
191
192 /*
193 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
194 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
195 * l2_rqsts.pf_miss + l2_rqsts.rfo_miss
196 * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss
197 * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all)
198 * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all)
199 *
200 * l2_rqsts.demand_data_rd_hit = 100
201 * l2_rqsts.pf_hit = 200
202 * l2_rqsts.rfo_hi = 300
203 * l2_rqsts.all_demand_data_rd = 400
204 * l2_rqsts.pf_miss = 500
205 * l2_rqsts.rfo_miss = 600
206 *
207 * DCache_L2_All_Hits = 600
208 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
209 * DCache_L2_All = 600 + 1400 = 2000
210 * DCache_L2_Hits = 600 / 2000 = 0.3
211 * DCache_L2_Misses = 1400 / 2000 = 0.7
212 */
213 static int test_dcache_l2(void)
214 {
215 double ratio;
216 struct value vals[] = {
217 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
218 { .event = "l2_rqsts.pf_hit", .val = 200 },
219 { .event = "l2_rqsts.rfo_hit", .val = 300 },
220 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
221 { .event = "l2_rqsts.pf_miss", .val = 500 },
222 { .event = "l2_rqsts.rfo_miss", .val = 600 },
223 { .event = NULL, },
224 };
225
226 TEST_ASSERT_VAL("failed to compute metric",
227 compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
228
229 TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
230 ratio == 0.3);
231
232 TEST_ASSERT_VAL("failed to compute metric",
233 compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
234
235 TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
236 ratio == 0.7);
237 return 0;
238 }
239
240 static int test_recursion_fail(void)
241 {
242 double ratio;
243 struct value vals[] = {
244 { .event = "inst_retired.any", .val = 300 },
245 { .event = "cpu_clk_unhalted.thread", .val = 200 },
246 { .event = NULL, },
247 };
248
249 TEST_ASSERT_VAL("failed to find recursion",
250 compute_metric("M1", vals, &ratio) == -1);
251
252 TEST_ASSERT_VAL("failed to find recursion",
253 compute_metric("M3", vals, &ratio) == -1);
254 return 0;
255 }
256
257 static int test_memory_bandwidth(void)
258 {
259 double ratio;
260 struct value vals[] = {
261 { .event = "l1d.replacement", .val = 4000000 },
262 { .event = "duration_time", .val = 200000000 },
263 { .event = NULL, },
264 };
265
266 TEST_ASSERT_VAL("failed to compute metric",
267 compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0);
268 TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio",
269 1.28 == ratio);
270
271 return 0;
272 }
273
274 static int test_metric_group(void)
275 {
276 double ratio1, ratio2;
277 struct value vals[] = {
278 { .event = "cpu_clk_unhalted.thread", .val = 200 },
279 { .event = "l1d-loads-misses", .val = 300 },
280 { .event = "l1i-loads-misses", .val = 200 },
281 { .event = "inst_retired.any", .val = 400 },
282 { .event = NULL, },
283 };
284
285 TEST_ASSERT_VAL("failed to find recursion",
286 compute_metric_group("group1", vals,
287 "IPC", &ratio1,
288 "cache_miss_cycles", &ratio2) == 0);
289
290 TEST_ASSERT_VAL("group IPC failed, wrong ratio",
291 ratio1 == 2.0);
292
293 TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio",
294 ratio2 == 1.25);
295 return 0;
296 }
297
298 static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
299 {
300 TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
301 TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
302 TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
303 TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0);
304 TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0);
305 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
306 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);
307 return 0;
308 }
309
310 DEFINE_SUITE("Parse and process metrics", parse_metric);
311
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