diff options
| -rw-r--r-- | tools/perf/tests/Build | 1 | ||||
| -rw-r--r-- | tools/perf/tests/builtin-test.c | 1 | ||||
| -rw-r--r-- | tools/perf/tests/event_groups.c | 127 | ||||
| -rw-r--r-- | tools/perf/tests/tests.h | 1 |
4 files changed, 130 insertions, 0 deletions
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index 11b69023011b..658b5052c24d 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -67,6 +67,7 @@ perf-y += expand-cgroup.o perf-y += perf-time-to-tsc.o perf-y += dlfilter-test.o perf-y += sigtrap.o +perf-y += event_groups.o $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build $(call rule_mkdir) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 4c6ae59a4dfd..ddd8262bfa26 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -110,6 +110,7 @@ static struct test_suite *generic_tests[] = { &suite__perf_time_to_tsc, &suite__dlfilter, &suite__sigtrap, + &suite__event_groups, NULL, }; diff --git a/tools/perf/tests/event_groups.c b/tools/perf/tests/event_groups.c new file mode 100644 index 000000000000..612c0444aaa8 --- /dev/null +++ b/tools/perf/tests/event_groups.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <string.h> +#include <unistd.h> +#include <stdio.h> +#include "linux/perf_event.h" +#include "tests.h" +#include "debug.h" +#include "pmu.h" +#include "pmus.h" +#include "header.h" +#include "../perf-sys.h" + +/* hw: cycles, sw: context-switch, uncore: [arch dependent] */ +static int types[] = {0, 1, -1}; +static unsigned long configs[] = {0, 3, 0}; + +#define NR_UNCORE_PMUS 5 + +/* Uncore pmus that support more than 3 counters */ +static struct uncore_pmus { + const char *name; + __u64 config; +} uncore_pmus[NR_UNCORE_PMUS] = { + { "amd_l3", 0x0 }, + { "amd_df", 0x0 }, + { "uncore_imc_0", 0x1 }, /* Intel */ + { "core_imc", 0x318 }, /* PowerPC: core_imc/CPM_STCX_FIN/ */ + { "hv_24x7", 0x22000000003 }, /* PowerPC: hv_24x7/CPM_STCX_FIN/ */ +}; + +static int event_open(int type, unsigned long config, int group_fd) +{ + struct perf_event_attr attr; + + memset(&attr, 0, sizeof(struct perf_event_attr)); + attr.type = type; + attr.size = sizeof(struct perf_event_attr); + attr.config = config; + /* + * When creating an event group, typically the group leader is + * initialized with disabled set to 1 and any child events are + * initialized with disabled set to 0. Despite disabled being 0, + * the child events will not start until the group leader is + * enabled. + */ + attr.disabled = group_fd == -1 ? 1 : 0; + + return sys_perf_event_open(&attr, -1, 0, group_fd, 0); +} + +static int setup_uncore_event(void) +{ + struct perf_pmu *pmu; + int i; + + if (list_empty(&pmus)) + perf_pmu__scan(NULL); + + perf_pmus__for_each_pmu(pmu) { + for (i = 0; i < NR_UNCORE_PMUS; i++) { + if (!strcmp(uncore_pmus[i].name, pmu->name)) { + pr_debug("Using %s for uncore pmu event\n", pmu->name); + types[2] = pmu->type; + configs[2] = uncore_pmus[i].config; + return 0; + } + } + } + return -1; +} + +static int run_test(int i, int j, int k) +{ + int erroneous = ((((1 << i) | (1 << j) | (1 << k)) & 5) == 5); + int group_fd, sibling_fd1, sibling_fd2; + + group_fd = event_open(types[i], configs[i], -1); + if (group_fd == -1) + return -1; + + sibling_fd1 = event_open(types[j], configs[j], group_fd); + if (sibling_fd1 == -1) { + close(group_fd); + return erroneous ? 0 : -1; + } + + sibling_fd2 = event_open(types[k], configs[k], group_fd); + if (sibling_fd2 == -1) { + close(sibling_fd1); + close(group_fd); + return erroneous ? 0 : -1; + } + + close(sibling_fd2); + close(sibling_fd1); + close(group_fd); + return erroneous ? -1 : 0; +} + +static int test__event_groups(struct test_suite *text __maybe_unused, int subtest __maybe_unused) +{ + int i, j, k; + int ret; + int r; + + ret = setup_uncore_event(); + if (ret || types[2] == -1) + return TEST_SKIP; + + ret = TEST_OK; + for (i = 0; i < 3; i++) { + for (j = 0; j < 3; j++) { + for (k = 0; k < 3; k++) { + r = run_test(i, j, k); + if (r) + ret = TEST_FAIL; + + pr_debug("0x%x 0x%lx, 0x%x 0x%lx, 0x%x 0x%lx: %s\n", + types[i], configs[i], types[j], configs[j], + types[k], configs[k], r ? "Fail" : "Pass"); + } + } + } + return ret; +} + +DEFINE_SUITE("Event groups", event_groups); diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index e15f24cfc909..fb4b5ad4dd0f 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -147,6 +147,7 @@ DECLARE_SUITE(expand_cgroup_events); DECLARE_SUITE(perf_time_to_tsc); DECLARE_SUITE(dlfilter); DECLARE_SUITE(sigtrap); +DECLARE_SUITE(event_groups); /* * PowerPC and S390 do not support creation of instruction breakpoints using the |