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Message-ID: <20230425142205.762-4-ravi.bangoria@amd.com>
Date: Tue, 25 Apr 2023 19:52:05 +0530
From: Ravi Bangoria <ravi.bangoria@....com>
To: <peterz@...radead.org>
CC: <ravi.bangoria@....com>, <namhyung@...nel.org>,
<eranian@...gle.com>, <acme@...nel.org>, <mark.rutland@....com>,
<jolsa@...nel.org>, <irogers@...gle.com>, <bp@...en8.de>,
<kan.liang@...ux.intel.com>, <adrian.hunter@...el.com>,
<maddy@...ux.ibm.com>, <x86@...nel.org>,
<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<sandipan.das@....com>, <ananth.narayan@....com>,
<santosh.shukla@....com>
Subject: [PATCH v3 3/3] perf test: Add selftest to test IBS invocation via core pmu events
IBS pmu can be invoked via fixed set of core pmu events with 'precise_ip'
set to 1. Add a simple event open test for all these events.
Without kernel fix:
$ sudo ./perf test -vv 76
76: AMD IBS via core pmu :
--- start ---
test child forked, pid 6553
Using CPUID AuthenticAMD-25-1-1
type: 0x0, config: 0x0, fd: 3 - Pass
type: 0x0, config: 0x1, fd: -1 - Pass
type: 0x4, config: 0x76, fd: -1 - Fail
type: 0x4, config: 0xc1, fd: -1 - Fail
type: 0x4, config: 0x12, fd: -1 - Pass
test child finished with -1
---- end ----
AMD IBS via core pmu: FAILED!
With kernel fix:
$ sudo ./perf test -vv 76
76: AMD IBS via core pmu :
--- start ---
test child forked, pid 7526
Using CPUID AuthenticAMD-25-1-1
type: 0x0, config: 0x0, fd: 3 - Pass
type: 0x0, config: 0x1, fd: -1 - Pass
type: 0x4, config: 0x76, fd: 3 - Pass
type: 0x4, config: 0xc1, fd: 3 - Pass
type: 0x4, config: 0x12, fd: -1 - Pass
test child finished with 0
---- end ----
AMD IBS via core pmu: Ok
Signed-off-by: Ravi Bangoria <ravi.bangoria@....com>
---
tools/perf/tests/Build | 1 +
tools/perf/tests/amd-ibs-via-core-pmu.c | 72 +++++++++++++++++++++++++
tools/perf/tests/builtin-test.c | 1 +
tools/perf/tests/tests.h | 1 +
4 files changed, 75 insertions(+)
create mode 100644 tools/perf/tests/amd-ibs-via-core-pmu.c
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index fb9ac5dc4079..ff7234653503 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -69,6 +69,7 @@ perf-y += dlfilter-test.o
perf-y += sigtrap.o
perf-y += event_groups.o
perf-y += symbols.o
+perf-y += amd-ibs-via-core-pmu.o
$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
$(call rule_mkdir)
diff --git a/tools/perf/tests/amd-ibs-via-core-pmu.c b/tools/perf/tests/amd-ibs-via-core-pmu.c
new file mode 100644
index 000000000000..6f6eb2d84fde
--- /dev/null
+++ b/tools/perf/tests/amd-ibs-via-core-pmu.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "linux/perf_event.h"
+#include "tests.h"
+#include "pmu.h"
+#include "pmus.h"
+#include "../perf-sys.h"
+#include "debug.h"
+
+#define NR_SUB_TESTS 5
+
+static struct sub_tests {
+ int type;
+ unsigned long config;
+ bool valid;
+} sub_tests[NR_SUB_TESTS] = {
+ { PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES, true },
+ { PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS, false },
+ { PERF_TYPE_RAW, 0x076, true },
+ { PERF_TYPE_RAW, 0x0C1, true },
+ { PERF_TYPE_RAW, 0x012, false },
+};
+
+static int event_open(int type, unsigned long config)
+{
+ 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;
+ attr.disabled = 1;
+ attr.precise_ip = 1;
+ attr.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
+ attr.sample_period = 100000;
+
+ return sys_perf_event_open(&attr, -1, 0, -1, 0);
+}
+
+static int test__amd_ibs_via_core_pmu(struct test_suite *text __maybe_unused,
+ int subtest __maybe_unused)
+{
+ struct perf_pmu *ibs_pmu;
+ int ret = TEST_OK;
+ int fd, i;
+
+ if (list_empty(&pmus))
+ perf_pmu__scan(NULL);
+
+ ibs_pmu = perf_pmu__find("ibs_op");
+ if (!ibs_pmu)
+ return TEST_SKIP;
+
+ for (i = 0; i < NR_SUB_TESTS; i++) {
+ fd = event_open(sub_tests[i].type, sub_tests[i].config);
+ pr_debug("type: 0x%x, config: 0x%lx, fd: %d - ", sub_tests[i].type,
+ sub_tests[i].config, fd);
+ if ((sub_tests[i].valid && fd == -1) ||
+ (!sub_tests[i].valid && fd > 0)) {
+ pr_debug("Fail\n");
+ ret = TEST_FAIL;
+ } else {
+ pr_debug("Pass\n");
+ }
+
+ if (fd > 0)
+ close(fd);
+ }
+
+ return ret;
+}
+
+DEFINE_SUITE("AMD IBS via core pmu", amd_ibs_via_core_pmu);
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 35cc3807cc9e..1805a4fae762 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -119,6 +119,7 @@ static struct test_suite *generic_tests[] = {
&suite__sigtrap,
&suite__event_groups,
&suite__symbols,
+ &suite__amd_ibs_via_core_pmu,
NULL,
};
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 9a0f3904e53d..65589d40638d 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -149,6 +149,7 @@ DECLARE_SUITE(dlfilter);
DECLARE_SUITE(sigtrap);
DECLARE_SUITE(event_groups);
DECLARE_SUITE(symbols);
+DECLARE_SUITE(amd_ibs_via_core_pmu);
/*
* PowerPC and S390 do not support creation of instruction breakpoints using the
--
2.40.0
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