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authorDamjan Marion <damarion@cisco.com>2022-04-06 21:16:37 +0200
committerFlorin Coras <florin.coras@gmail.com>2022-04-08 15:53:10 +0000
commitd5045e68a782d484e3f0e54edb4a88dc3dfac291 (patch)
treef0cf5627b672050e4463d1dee4ea952a066c12d6 /src/vppinfra/perfmon/perfmon.h
parentdfc43164078b481e39dc0a87e8e358cc6a56d14e (diff)
vppinfra: introduce clib_perfmom
Type: improvement Change-Id: I85a90774eb313020435c9bc2297c1bdf23d52efc Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/perfmon/perfmon.h')
-rw-r--r--src/vppinfra/perfmon/perfmon.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/vppinfra/perfmon/perfmon.h b/src/vppinfra/perfmon/perfmon.h
new file mode 100644
index 00000000000..0d09dc6fb23
--- /dev/null
+++ b/src/vppinfra/perfmon/perfmon.h
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2022 Cisco Systems, Inc.
+ */
+
+#ifndef included_perfmon_perfmon_h
+#define included_perfmon_perfmon_h
+
+#include <vppinfra/cpu.h>
+#ifdef __linux__
+#include <sys/ioctl.h>
+#include <linux/perf_event.h>
+#endif
+
+#define CLIB_PERFMON_MAX_EVENTS 7
+typedef struct
+{
+ char *name;
+ char *desc;
+ u64 config[CLIB_PERFMON_MAX_EVENTS];
+ u32 type;
+ u8 n_events;
+ format_function_t *format_fn;
+ char **column_headers;
+} clib_perfmon_bundle_t;
+
+typedef struct
+{
+ u64 time_enabled;
+ u64 time_running;
+ u64 data[CLIB_PERFMON_MAX_EVENTS];
+ u8 *desc;
+ u32 n_ops;
+ u32 group;
+} clib_perfmon_capture_t;
+
+typedef struct
+{
+ u8 *name;
+ u32 start;
+} clib_perfmon_capture_group_t;
+
+typedef struct
+{
+ int group_fd;
+ int *fds;
+ clib_perfmon_bundle_t *bundle;
+ u64 *data;
+ u8 debug : 1;
+ u32 n_captures;
+ clib_perfmon_capture_t *captures;
+ clib_perfmon_capture_group_t *capture_groups;
+ f64 ref_clock;
+} clib_perfmon_ctx_t;
+
+typedef struct clib_perfmon_bundle_reg
+{
+ clib_perfmon_bundle_t *bundle;
+ struct clib_perfmon_bundle_reg *next;
+} clib_perfmon_bundle_reg_t;
+
+typedef struct
+{
+ clib_perfmon_bundle_reg_t *bundle_regs;
+} clib_perfmon_main_t;
+
+extern clib_perfmon_main_t clib_perfmon_main;
+
+static_always_inline void
+clib_perfmon_ioctl (int fd, u32 req)
+{
+#ifdef __x86_64__
+ asm inline("syscall"
+ :
+ : "D"(fd), "S"(req), "a"(__NR_ioctl), "d"(PERF_IOC_FLAG_GROUP)
+ : "rcx", "r11" /* registers modified by kernel */);
+#else
+ ioctl (fd, req, PERF_IOC_FLAG_GROUP);
+#endif
+}
+
+clib_error_t *clib_perfmon_init_by_bundle_name (clib_perfmon_ctx_t *ctx,
+ char *fmt, ...);
+void clib_perfmon_free (clib_perfmon_ctx_t *ctx);
+void clib_perfmon_warmup (clib_perfmon_ctx_t *ctx);
+void clib_perfmon_clear (clib_perfmon_ctx_t *ctx);
+u64 *clib_perfmon_capture (clib_perfmon_ctx_t *ctx, u32 n_ops, char *fmt, ...);
+void clib_perfmon_capture_group (clib_perfmon_ctx_t *ctx, char *fmt, ...);
+format_function_t format_perfmon_bundle;
+
+static_always_inline void
+clib_perfmon_reset (clib_perfmon_ctx_t *ctx)
+{
+ clib_perfmon_ioctl (ctx->group_fd, PERF_EVENT_IOC_RESET);
+}
+static_always_inline void
+clib_perfmon_enable (clib_perfmon_ctx_t *ctx)
+{
+ clib_perfmon_ioctl (ctx->group_fd, PERF_EVENT_IOC_ENABLE);
+}
+static_always_inline void
+clib_perfmon_disable (clib_perfmon_ctx_t *ctx)
+{
+ clib_perfmon_ioctl (ctx->group_fd, PERF_EVENT_IOC_DISABLE);
+}
+
+#define CLIB_PERFMON_BUNDLE(x) \
+ static clib_perfmon_bundle_reg_t clib_perfmon_bundle_reg_##x; \
+ static clib_perfmon_bundle_t clib_perfmon_bundle_##x; \
+ static void __clib_constructor clib_perfmon_bundle_reg_fn_##x (void) \
+ { \
+ clib_perfmon_bundle_reg_##x.bundle = &clib_perfmon_bundle_##x; \
+ clib_perfmon_bundle_reg_##x.next = clib_perfmon_main.bundle_regs; \
+ clib_perfmon_main.bundle_regs = &clib_perfmon_bundle_reg_##x; \
+ } \
+ static clib_perfmon_bundle_t clib_perfmon_bundle_##x
+
+#endif