diff mbox series

[3/4] eal/x86: support reading Intel PMU events in runtime

Message ID 20221111094338.2736065-4-tduszynski@marvell.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series add support for self monitoring |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Tomasz Duszynski Nov. 11, 2022, 9:43 a.m. UTC 
  Add support for reading Intel PMU events in runtime.

Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
---
 app/test/test_pmu.c               |  2 ++
 lib/eal/include/rte_pmu.h         |  2 +-
 lib/eal/x86/include/meson.build   |  1 +
 lib/eal/x86/include/rte_pmu_pmc.h | 32 +++++++++++++++++++++++++++++++
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 lib/eal/x86/include/rte_pmu_pmc.h
diff mbox series

Patch

diff --git a/app/test/test_pmu.c b/app/test/test_pmu.c
index f94866dff9..016204c083 100644
--- a/app/test/test_pmu.c
+++ b/app/test/test_pmu.c
@@ -15,6 +15,8 @@  test_pmu_read(void)
 
 #if defined(RTE_ARCH_ARM64)
 	event = rte_pmu_add_event("cpu_cycles");
+#elif defined(RTE_ARCH_X86_64)
+	event = rte_pmu_add_event("cpu-cycles");
 #endif
 
 	while (tries--)
diff --git a/lib/eal/include/rte_pmu.h b/lib/eal/include/rte_pmu.h
index 67b1194a2a..bbe12d100d 100644
--- a/lib/eal/include/rte_pmu.h
+++ b/lib/eal/include/rte_pmu.h
@@ -20,7 +20,7 @@  extern "C" {
 #include <rte_branch_prediction.h>
 #include <rte_lcore.h>
 #include <rte_log.h>
-#if defined(RTE_ARCH_ARM64)
+#if defined(RTE_ARCH_ARM64) || defined(RTE_ARCH_X86_64)
 #include <rte_pmu_pmc.h>
 #endif
 
diff --git a/lib/eal/x86/include/meson.build b/lib/eal/x86/include/meson.build
index 52d2f8e969..03d286ed25 100644
--- a/lib/eal/x86/include/meson.build
+++ b/lib/eal/x86/include/meson.build
@@ -9,6 +9,7 @@  arch_headers = files(
         'rte_io.h',
         'rte_memcpy.h',
         'rte_pause.h',
+        'rte_pmu_pmc.h',
         'rte_power_intrinsics.h',
         'rte_prefetch.h',
         'rte_rtm.h',
diff --git a/lib/eal/x86/include/rte_pmu_pmc.h b/lib/eal/x86/include/rte_pmu_pmc.h
new file mode 100644
index 0000000000..6ecb27a1eb
--- /dev/null
+++ b/lib/eal/x86/include/rte_pmu_pmc.h
@@ -0,0 +1,32 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2022 Marvell.
+ */
+
+#ifndef _RTE_PMU_PMC_X86_H_
+#define _RTE_PMU_PMC_X86_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+__rte_internal
+static __rte_always_inline uint64_t
+rte_pmu_pmc_read(int index)
+{
+	uint32_t high, low;
+
+	asm volatile(
+		"rdpmc\n"
+		: "=a" (low), "=d" (high)
+		: "c" (index)
+	);
+
+	return ((uint64_t)high << 32) | (uint64_t)low;
+}
+#define rte_pmu_pmc_read rte_pmu_pmc_read
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_PMU_PMC_X86_H_ */