[v12,3/4] pmu: support reading Intel x86_64 PMU events in runtime
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Commit Message
Add support for reading Intel x86_64 PMU events in runtime.
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
---
app/test/test_pmu.c | 2 ++
lib/pmu/meson.build | 1 +
lib/pmu/rte_pmu.h | 2 ++
lib/pmu/rte_pmu_pmc_x86_64.h | 24 ++++++++++++++++++++++++
4 files changed, 29 insertions(+)
create mode 100644 lib/pmu/rte_pmu_pmc_x86_64.h
@@ -26,6 +26,8 @@ test_pmu_read(void)
#if defined(RTE_ARCH_ARM64)
name = "cpu_cycles";
+#elif defined(RTE_ARCH_X86_64)
+ name = "cpu-cycles";
#endif
if (name == NULL) {
@@ -14,6 +14,7 @@ headers = files('rte_pmu.h')
indirect_headers += files(
'rte_pmu_pmc_arm64.h',
+ 'rte_pmu_pmc_x86_64.h',
)
if dpdk_conf.has('RTE_ARCH_ARM64')
@@ -28,6 +28,8 @@ extern "C" {
#if defined(RTE_ARCH_ARM64)
#include "rte_pmu_pmc_arm64.h"
+#elif defined(RTE_ARCH_X86_64)
+#include "rte_pmu_pmc_x86_64.h"
#endif
/** Maximum number of events in a group */
new file mode 100644
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2024 Marvell.
+ */
+#ifndef _RTE_PMU_PMC_X86_64_H_
+#define _RTE_PMU_PMC_X86_64_H_
+
+#include <rte_common.h>
+
+static __rte_always_inline uint64_t
+rte_pmu_pmc_read(int index)
+{
+ uint64_t low, high;
+
+ asm volatile(
+ "rdpmc\n"
+ : "=a" (low), "=d" (high)
+ : "c" (index)
+ );
+
+ return low | (high << 32);
+}
+#define rte_pmu_pmc_read rte_pmu_pmc_read
+
+#endif /* _RTE_PMU_PMC_X86_64_H_ */