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authorDave Barach <dave@barachs.net>2018-09-10 12:31:15 -0400
committerDamjan Marion <dmarion@me.com>2018-10-22 12:02:04 +0000
commit4d1a866aff6ceb03025990b6e60b42faf09ef486 (patch)
treebec495932876d9649f26179b4c24b6938be43f38 /src/vppinfra/pmc.h
parent115a3ac59a16f9dcfee92eaecc79cd1fa3320e29 (diff)
X86_64 perf counter plugin
Change-Id: Ie5a00c15ee9536cc61afab57f6cadc1aa1972f3c Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vppinfra/pmc.h')
-rw-r--r--src/vppinfra/pmc.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/vppinfra/pmc.h b/src/vppinfra/pmc.h
new file mode 100644
index 00000000000..258b925127d
--- /dev/null
+++ b/src/vppinfra/pmc.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_clib_pmc_h
+#define included_clib_pmc_h
+
+#if defined (__x86_64__)
+
+always_inline u64
+clib_rdpmc (int counter_id)
+{
+ u32 a, d;
+
+ asm volatile ("rdpmc":"=a" (a), "=d" (d):"c" (counter_id));
+ return (u64) a + ((u64) d << (u64) 32);
+}
+
+#else
+always_inline u64
+clib_rdpmc (int counter_id)
+{
+ return 0ULL;
+}
+#endif /* __aarch64__ */
+
+#endif /* included_clib_pmc_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */