tools/perf/tests/expr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "util/cputopo.h"
   3 #include "util/debug.h"
   4 #include "util/expr.h"
   5 #include "util/hashmap.h"
   6 #include "util/header.h"
   7 #include "util/smt.h"
   8 #include "tests.h"
   9 #include <perf/cpumap.h>
  10 #include <math.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <string2.h>
  14 #include <linux/zalloc.h>
  15
  16 static int test_ids_union(void)
  17 {
  18         struct hashmap *ids1, *ids2;
  19
  20         /* Empty union. */
  21         ids1 = ids__new();
  22         TEST_ASSERT_VAL("ids__new", ids1);
  23         ids2 = ids__new();
  24         TEST_ASSERT_VAL("ids__new", ids2);
  25
  26         ids1 = ids__union(ids1, ids2);
  27         TEST_ASSERT_EQUAL("union", (int)hashmap__size(ids1), 0);
  28
  29         /* Union {foo, bar} against {}. */
  30         ids2 = ids__new();
  31         TEST_ASSERT_VAL("ids__new", ids2);
  32
  33         TEST_ASSERT_EQUAL("ids__insert", ids__insert(ids1, strdup("foo")), 0);
  34         TEST_ASSERT_EQUAL("ids__insert", ids__insert(ids1, strdup("bar")), 0);
  35
  36         ids1 = ids__union(ids1, ids2);
  37         TEST_ASSERT_EQUAL("union", (int)hashmap__size(ids1), 2);
  38
  39         /* Union {foo, bar} against {foo}. */
  40         ids2 = ids__new();
  41         TEST_ASSERT_VAL("ids__new", ids2);
  42         TEST_ASSERT_EQUAL("ids__insert", ids__insert(ids2, strdup("foo")), 0);
  43
  44         ids1 = ids__union(ids1, ids2);
  45         TEST_ASSERT_EQUAL("union", (int)hashmap__size(ids1), 2);
  46
  47         /* Union {foo, bar} against {bar,baz}. */
  48         ids2 = ids__new();
  49         TEST_ASSERT_VAL("ids__new", ids2);
  50         TEST_ASSERT_EQUAL("ids__insert", ids__insert(ids2, strdup("bar")), 0);
  51         TEST_ASSERT_EQUAL("ids__insert", ids__insert(ids2, strdup("baz")), 0);
  52
  53         ids1 = ids__union(ids1, ids2);
  54         TEST_ASSERT_EQUAL("union", (int)hashmap__size(ids1), 3);
  55
  56         ids__free(ids1);
  57
  58         return 0;
  59 }
  60
  61 static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
  62 {
  63         double val;
  64
  65         if (expr__parse(&val, ctx, e))
  66                 TEST_ASSERT_VAL("parse test failed", 0);
  67         TEST_ASSERT_VAL("unexpected value", val == val2);
  68         return 0;
  69 }
  70
  71 static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
  72 {
  73         struct expr_id_data *val_ptr;
  74         const char *p;
  75         double val, num_cpus_online, num_cpus, num_cores, num_dies, num_packages;
  76         int ret;
  77         struct expr_parse_ctx *ctx;
  78         bool is_intel = false;
  79         char strcmp_cpuid_buf[256];
  80         struct perf_cpu cpu = {-1};
  81         char *cpuid = get_cpuid_allow_env_override(cpu);
  82         char *escaped_cpuid1, *escaped_cpuid2;
  83
  84         TEST_ASSERT_VAL("get_cpuid", cpuid);
  85         is_intel = strstr(cpuid, "Intel") != NULL;
  86
  87         TEST_ASSERT_EQUAL("ids_union", test_ids_union(), 0);
  88
  89         ctx = expr__ctx_new();
  90         TEST_ASSERT_VAL("expr__ctx_new", ctx);
  91         expr__add_id_val(ctx, strdup("FOO"), 1);
  92         expr__add_id_val(ctx, strdup("BAR"), 2);
  93
  94         ret = test(ctx, "1+1", 2);
  95         ret |= test(ctx, "FOO+BAR", 3);
  96         ret |= test(ctx, "(BAR/2)%2", 1);
  97         ret |= test(ctx, "1 - -4",  5);
  98         ret |= test(ctx, "(FOO-1)*2 + (BAR/2)%2 - -4",  5);
  99         ret |= test(ctx, "1-1 | 1", 1);
 100         ret |= test(ctx, "1-1 & 1", 0);
 101         ret |= test(ctx, "min(1,2) + 1", 2);
 102         ret |= test(ctx, "max(1,2) + 1", 3);
 103         ret |= test(ctx, "1+1 if 3*4 else 0", 2);
 104         ret |= test(ctx, "100 if 1 else 200 if 1 else 300", 100);
 105         ret |= test(ctx, "100 if 0 else 200 if 1 else 300", 200);
 106         ret |= test(ctx, "100 if 1 else 200 if 0 else 300", 100);
 107         ret |= test(ctx, "100 if 0 else 200 if 0 else 300", 300);
 108         ret |= test(ctx, "1.1 + 2.1", 3.2);
 109         ret |= test(ctx, ".1 + 2.", 2.1);
 110         ret |= test(ctx, "d_ratio(1, 2)", 0.5);
 111         ret |= test(ctx, "d_ratio(2.5, 0)", 0);
 112         ret |= test(ctx, "1.1 < 2.2", 1);
 113         ret |= test(ctx, "2.2 > 1.1", 1);
 114         ret |= test(ctx, "1.1 < 1.1", 0);
 115         ret |= test(ctx, "2.2 > 2.2", 0);
 116         ret |= test(ctx, "2.2 < 1.1", 0);
 117         ret |= test(ctx, "1.1 > 2.2", 0);
 118         ret |= test(ctx, "1.1e10 < 1.1e100", 1);
 119         ret |= test(ctx, "1.1e2 > 1.1e-2", 1);
 120
 121         if (ret) {
 122                 expr__ctx_free(ctx);
 123                 return ret;
 124         }
 125
 126         p = "FOO/0";
 127         ret = expr__parse(&val, ctx, p);
 128         TEST_ASSERT_VAL("division by zero", ret == 0);
 129         TEST_ASSERT_VAL("division by zero", isnan(val));
 130
 131         p = "BAR/";
 132         ret = expr__parse(&val, ctx, p);
 133         TEST_ASSERT_VAL("missing operand", ret == -1);
 134
 135         expr__ctx_clear(ctx);
 136         TEST_ASSERT_VAL("find ids",
 137                         expr__find_ids("FOO + BAR + BAZ + BOZO", "FOO",
 138                                         ctx) == 0);
 139         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 3);
 140         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "BAR", &val_ptr));
 141         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "BAZ", &val_ptr));
 142         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "BOZO", &val_ptr));
 143
 144         expr__ctx_clear(ctx);
 145         ctx->sctx.runtime = 3;
 146         TEST_ASSERT_VAL("find ids",
 147                         expr__find_ids("EVENT1\\,param\\=?@ + EVENT2\\,param\\=?@",
 148                                         NULL, ctx) == 0);
 149         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 2);
 150         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1,param=3@", &val_ptr));
 151         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT2,param=3@", &val_ptr));
 152
 153         expr__ctx_clear(ctx);
 154         TEST_ASSERT_VAL("find ids",
 155                         expr__find_ids("dash\\-event1 - dash\\-event2",
 156                                        NULL, ctx) == 0);
 157         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 2);
 158         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "dash-event1", &val_ptr));
 159         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "dash-event2", &val_ptr));
 160
 161         /* Only EVENT1 or EVENT2 need be measured depending on the value of smt_on. */
 162         {
 163                 bool smton = smt_on();
 164                 bool corewide = core_wide(/*system_wide=*/false,
 165                                           /*user_requested_cpus=*/false);
 166
 167                 expr__ctx_clear(ctx);
 168                 TEST_ASSERT_VAL("find ids",
 169                                 expr__find_ids("EVENT1 if #smt_on else EVENT2",
 170                                         NULL, ctx) == 0);
 171                 TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 172                 TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids,
 173                                                           smton ? "EVENT1" : "EVENT2",
 174                                                           &val_ptr));
 175
 176                 expr__ctx_clear(ctx);
 177                 TEST_ASSERT_VAL("find ids",
 178                                 expr__find_ids("EVENT1 if #core_wide else EVENT2",
 179                                         NULL, ctx) == 0);
 180                 TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 181                 TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids,
 182                                                           corewide ? "EVENT1" : "EVENT2",
 183                                                           &val_ptr));
 184
 185         }
 186         /* The expression is a constant 1.0 without needing to evaluate EVENT1. */
 187         expr__ctx_clear(ctx);
 188         TEST_ASSERT_VAL("find ids",
 189                         expr__find_ids("1.0 if EVENT1 > 100.0 else 1.0",
 190                         NULL, ctx) == 0);
 191         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
 192
 193         /* The expression is a constant 0.0 without needing to evaluate EVENT1. */
 194         expr__ctx_clear(ctx);
 195         TEST_ASSERT_VAL("find ids",
 196                         expr__find_ids("0 & EVENT1 > 0", NULL, ctx) == 0);
 197         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
 198         expr__ctx_clear(ctx);
 199         TEST_ASSERT_VAL("find ids",
 200                         expr__find_ids("EVENT1 > 0 & 0", NULL, ctx) == 0);
 201         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
 202         expr__ctx_clear(ctx);
 203         TEST_ASSERT_VAL("find ids",
 204                         expr__find_ids("1 & EVENT1 > 0", NULL, ctx) == 0);
 205         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 206         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 207         expr__ctx_clear(ctx);
 208         TEST_ASSERT_VAL("find ids",
 209                         expr__find_ids("EVENT1 > 0 & 1", NULL, ctx) == 0);
 210         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 211         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 212
 213         /* The expression is a constant 1.0 without needing to evaluate EVENT1. */
 214         expr__ctx_clear(ctx);
 215         TEST_ASSERT_VAL("find ids",
 216                         expr__find_ids("1 | EVENT1 > 0", NULL, ctx) == 0);
 217         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
 218         expr__ctx_clear(ctx);
 219         TEST_ASSERT_VAL("find ids",
 220                         expr__find_ids("EVENT1 > 0 | 1", NULL, ctx) == 0);
 221         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
 222         expr__ctx_clear(ctx);
 223         TEST_ASSERT_VAL("find ids",
 224                         expr__find_ids("0 | EVENT1 > 0", NULL, ctx) == 0);
 225         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 226         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 227         expr__ctx_clear(ctx);
 228         TEST_ASSERT_VAL("find ids",
 229                         expr__find_ids("EVENT1 > 0 | 0", NULL, ctx) == 0);
 230         TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
 231         TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 232
 233         /* Test toplogy constants appear well ordered. */
 234         expr__ctx_clear(ctx);
 235         TEST_ASSERT_VAL("#num_cpus_online",
 236                         expr__parse(&num_cpus_online, ctx, "#num_cpus_online") == 0);
 237         TEST_ASSERT_VAL("#num_cpus", expr__parse(&num_cpus, ctx, "#num_cpus") == 0);
 238         TEST_ASSERT_VAL("#num_cpus >= #num_cpus_online", num_cpus >= num_cpus_online);
 239         TEST_ASSERT_VAL("#num_cores", expr__parse(&num_cores, ctx, "#num_cores") == 0);
 240         TEST_ASSERT_VAL("#num_cpus >= #num_cores", num_cpus >= num_cores);
 241         TEST_ASSERT_VAL("#num_dies", expr__parse(&num_dies, ctx, "#num_dies") == 0);
 242         TEST_ASSERT_VAL("#num_cores >= #num_dies", num_cores >= num_dies);
 243         TEST_ASSERT_VAL("#num_packages", expr__parse(&num_packages, ctx, "#num_packages") == 0);
 244
 245         if (num_dies) // Some platforms do not have CPU die support, for example s390
 246                 TEST_ASSERT_VAL("#num_dies >= #num_packages", num_dies >= num_packages);
 247
 248         TEST_ASSERT_VAL("#system_tsc_freq", expr__parse(&val, ctx, "#system_tsc_freq") == 0);
 249         if (is_intel)
 250                 TEST_ASSERT_VAL("#system_tsc_freq > 0", val > 0);
 251         else
 252                 TEST_ASSERT_VAL("#system_tsc_freq == 0", fpclassify(val) == FP_ZERO);
 253
 254         /*
 255          * Source count returns the number of events aggregating in a leader
 256          * event including the leader. Check parsing yields an id.
 257          */
 258         expr__ctx_clear(ctx);
 259         TEST_ASSERT_VAL("source count",
 260                         expr__find_ids("source_count(EVENT1)",
 261                         NULL, ctx) == 0);
 262         TEST_ASSERT_VAL("source count", hashmap__size(ctx->ids) == 1);
 263         TEST_ASSERT_VAL("source count", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 264
 265
 266         /* Test no cpuid match */
 267         ret = test(ctx, "strcmp_cpuid_str(0x0)", 0);
 268
 269         /*
 270          * Test cpuid match with current cpuid. Special chars have to be
 271          * escaped.
 272          */
 273         escaped_cpuid1 = strreplace_chars('-', cpuid, "\\-");
 274         free(cpuid);
 275         escaped_cpuid2 = strreplace_chars(',', escaped_cpuid1, "\\,");
 276         free(escaped_cpuid1);
 277         escaped_cpuid1 = strreplace_chars('=', escaped_cpuid2, "\\=");
 278         free(escaped_cpuid2);
 279         scnprintf(strcmp_cpuid_buf, sizeof(strcmp_cpuid_buf),
 280                   "strcmp_cpuid_str(%s)", escaped_cpuid1);
 281         free(escaped_cpuid1);
 282         ret |= test(ctx, strcmp_cpuid_buf, 1);
 283
 284         /* has_event returns 1 when an event exists. */
 285         expr__add_id_val(ctx, strdup("cycles"), 2);
 286         ret |= test(ctx, "has_event(cycles)", 1);
 287
 288         expr__ctx_free(ctx);
 289
 290         return ret;
 291 }
 292
 293 DEFINE_SUITE("Simple expression parser", expr);