return()
endif()
-add_vpp_plugin(perfmon
- SOURCES
- cli.c
- dispatch_wrapper.c
- linux.c
- perfmon.c
+list(APPEND ARCH_PMU_SOURCES
+ intel/dispatch_wrapper.c
intel/core.c
intel/uncore.c
intel/bundle/backend_bound_core.c
intel/bundle/topdown_icelake.c
intel/bundle/topdown_metrics.c
intel/bundle/topdown_tremont.c
+)
+
+add_vpp_plugin(perfmon
+ SOURCES
+ cli.c
+ linux.c
+ perfmon.c
+ ${ARCH_PMU_SOURCES}
COMPONENT
vpp-plugin-devtools
#include <vnet/vnet.h>
#include <perfmon/perfmon.h>
#include <perfmon/intel/core.h>
+#include <perfmon/intel/dispatch_wrapper.h>
#include <linux/perf_event.h>
static perfmon_event_t events[] = {
return PERFMON_EVENT_TYPE_GENERAL;
}
+static u8
+is_enough_counters (perfmon_bundle_t *b)
+{
+ u8 bl[PERFMON_EVENT_TYPE_MAX];
+ u8 cpu[PERFMON_EVENT_TYPE_MAX];
+
+ clib_memset (&bl, 0, sizeof (bl));
+ clib_memset (&cpu, 0, sizeof (cpu));
+
+ /* how many does this uarch support */
+ if (!clib_get_pmu_counter_count (&cpu[PERFMON_EVENT_TYPE_FIXED],
+ &cpu[PERFMON_EVENT_TYPE_GENERAL]))
+ return 0;
+
+ /* how many does the bundle require */
+ for (u16 i = 0; i < b->n_events; i++)
+ {
+ /* if source allows us to identify events, otherwise assume general */
+ if (b->src->get_event_type)
+ bl[b->src->get_event_type (b->events[i])]++;
+ else
+ bl[PERFMON_EVENT_TYPE_GENERAL]++;
+ }
+
+ /* consciously ignoring pseudo events here */
+ return cpu[PERFMON_EVENT_TYPE_GENERAL] >= bl[PERFMON_EVENT_TYPE_GENERAL] &&
+ cpu[PERFMON_EVENT_TYPE_FIXED] >= bl[PERFMON_EVENT_TYPE_FIXED];
+}
+
+u8
+intel_bundle_supported (perfmon_bundle_t *b)
+{
+ perfmon_cpu_supports_t *supports = b->cpu_supports;
+
+ if (!is_enough_counters (b))
+ return 0;
+
+ if (!b->cpu_supports)
+ return 1;
+
+ for (int i = 0; i < b->n_cpu_supports; ++i)
+ if (supports[i].cpu_supports ())
+ return 1;
+
+ return 0;
+}
+
PERFMON_REGISTER_SOURCE (intel_core) = {
.name = "intel-core",
.description = "intel arch core events",
.init_fn = intel_core_init,
.get_event_type = intel_core_get_event_type,
.format_config = format_intel_core_config,
+ .bundle_support = intel_bundle_supported,
+ .config_dispatch_wrapper = intel_config_dispatch_wrapper,
};
#ifndef __perfmon_intel_h
#define __perfmon_intel_h
+u8 intel_bundle_supported (perfmon_bundle_t *b);
+
#define PERF_INTEL_CODE(event, umask, edge, any, inv, cmask) \
((event) | (umask) << 8 | (edge) << 18 | (any) << 21 | (inv) << 23 | \
(cmask) << 24)
#include <perfmon/perfmon.h>
+vlib_node_function_t *perfmon_dispatch_wrappers[PERF_MAX_EVENTS + 1];
+
static_always_inline void
perfmon_read_pmcs (u64 *counters, u32 *indexes, u8 n_counters)
{
return rv;
}
+static_always_inline u32
+perfmon_mmap_read_index (const struct perf_event_mmap_page *mmap_page)
+{
+ u32 idx;
+ u32 seq;
+
+ /* See documentation in /usr/include/linux/perf_event.h, for more details
+ * but the 2 main important things are:
+ * 1) if seq != mmap_page->lock, it means the kernel is currently updating
+ * the user page and we need to read it again
+ * 2) if idx == 0, it means the perf event is currently turned off and we
+ * just need to read the kernel-updated 'offset', otherwise we must also
+ * add the current hw value (hence rdmpc) */
+ do
+ {
+ seq = mmap_page->lock;
+ CLIB_COMPILER_BARRIER ();
+
+ idx = mmap_page->index;
+
+ CLIB_COMPILER_BARRIER ();
+ }
+ while (mmap_page->lock != seq);
+
+ return idx;
+}
+
+static_always_inline clib_error_t *
+read_mmap_indexes (perfmon_bundle_t *b)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ for (int i = 0; i < vec_len (pm->thread_runtimes); i++)
+ {
+ perfmon_thread_runtime_t *tr;
+ tr = vec_elt_at_index (pm->thread_runtimes, i);
+
+ for (int j = 0; j < b->n_events; j++)
+ {
+ tr->indexes[j] = perfmon_mmap_read_index (tr->mmap_pages[j]);
+
+ /* if a zero index is returned generate error */
+ if (!tr->indexes[j])
+ {
+ return clib_error_return (0, "invalid rdpmc index");
+ }
+ }
+ }
+ return 0;
+}
+
+clib_error_t *
+intel_config_dispatch_wrapper (perfmon_bundle_t *b,
+ vlib_node_function_t **dispatch_wrapper)
+{
+ clib_error_t *err = 0;
+ if ((err = read_mmap_indexes (b)) != 0)
+ return err;
+
+ (*dispatch_wrapper) = perfmon_dispatch_wrappers[b->n_events];
+ return 0;
+}
+
#define foreach_n_events \
_ (1) _ (2) _ (3) _ (4) _ (5) _ (6) _ (7) _ (8) _ (9) _ (10) _ (11) _ (12)
--- /dev/null
+/*
+ * Copyright (c) 2022 Arm 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.
+ */
+
+clib_error_t *
+intel_config_dispatch_wrapper (perfmon_bundle_t *b,
+ vlib_node_function_t **dispatch_wrapper);
.n_events = INTEL_UNCORE_N_EVENTS,
.init_fn = intel_uncore_init,
.format_config = format_intel_core_config,
+ .bundle_support = intel_bundle_supported,
};
return err;
}
-static_always_inline u32
-perfmon_mmap_read_index (const struct perf_event_mmap_page *mmap_page)
-{
- u32 idx;
- u32 seq;
-
- /* See documentation in /usr/include/linux/perf_event.h, for more details
- * but the 2 main important things are:
- * 1) if seq != mmap_page->lock, it means the kernel is currently updating
- * the user page and we need to read it again
- * 2) if idx == 0, it means the perf event is currently turned off and we
- * just need to read the kernel-updated 'offset', otherwise we must also
- * add the current hw value (hence rdmpc) */
- do
- {
- seq = mmap_page->lock;
- CLIB_COMPILER_BARRIER ();
-
- idx = mmap_page->index;
-
- CLIB_COMPILER_BARRIER ();
- }
- while (mmap_page->lock != seq);
-
- return idx;
-}
-
clib_error_t *
perfmon_start (vlib_main_t *vm, perfmon_bundle_t *b)
{
}
if (b->active_type == PERFMON_BUNDLE_TYPE_NODE)
{
- for (int i = 0; i < vec_len (pm->thread_runtimes); i++)
+ vlib_node_function_t *dispatch_wrapper = NULL;
+ err = b->src->config_dispatch_wrapper (b, &dispatch_wrapper);
+ if (err || !dispatch_wrapper)
{
- perfmon_thread_runtime_t *tr;
- tr = vec_elt_at_index (pm->thread_runtimes, i);
-
- for (int j = 0; j < b->n_events; j++)
- {
- tr->indexes[j] = perfmon_mmap_read_index (tr->mmap_pages[j]);
-
- /* if a zero index is returned generate error */
- if (!tr->indexes[j])
- {
- perfmon_reset (vm);
- return clib_error_return (0, "invalid rdpmc index");
- }
- }
+ perfmon_reset (vm);
+ return err;
}
for (int i = 0; i < vlib_get_n_threads (); i++)
- vlib_node_set_dispatch_wrapper (
- vlib_get_main_by_index (i), perfmon_dispatch_wrappers[b->n_events]);
+ vlib_node_set_dispatch_wrapper (vlib_get_main_by_index (i),
+ dispatch_wrapper);
}
pm->sample_time = vlib_time_now (vm);
pm->is_running = 1;
return 0;
}
-static_always_inline u8
-is_enough_counters (perfmon_bundle_t *b)
-{
- u8 bl[PERFMON_EVENT_TYPE_MAX];
- u8 cpu[PERFMON_EVENT_TYPE_MAX];
-
- clib_memset (&bl, 0, sizeof (bl));
- clib_memset (&cpu, 0, sizeof (cpu));
-
- /* how many does this uarch support */
- if (!clib_get_pmu_counter_count (&cpu[PERFMON_EVENT_TYPE_FIXED],
- &cpu[PERFMON_EVENT_TYPE_GENERAL]))
- return 0;
-
- /* how many does the bundle require */
- for (u16 i = 0; i < b->n_events; i++)
- {
- /* if source allows us to identify events, otherwise assume general */
- if (b->src->get_event_type)
- bl[b->src->get_event_type (b->events[i])]++;
- else
- bl[PERFMON_EVENT_TYPE_GENERAL]++;
- }
-
- /* consciously ignoring pseudo events here */
- return cpu[PERFMON_EVENT_TYPE_GENERAL] >= bl[PERFMON_EVENT_TYPE_GENERAL] &&
- cpu[PERFMON_EVENT_TYPE_FIXED] >= bl[PERFMON_EVENT_TYPE_FIXED];
-}
-
-static_always_inline u8
-is_bundle_supported (perfmon_bundle_t *b)
-{
- perfmon_cpu_supports_t *supports = b->cpu_supports;
-
- if (!is_enough_counters (b))
- return 0;
-
- if (!b->cpu_supports)
- return 1;
-
- for (int i = 0; i < b->n_cpu_supports; ++i)
- if (supports[i].cpu_supports ())
- return 1;
-
- return 0;
-}
-
static clib_error_t *
perfmon_init (vlib_main_t *vm)
{
}
b->src = (perfmon_source_t *) p[0];
- if (!is_bundle_supported (b))
+ if (b->src->bundle_support && !b->src->bundle_support (b))
{
log_debug ("skipping bundle '%s' - not supported", b->name);
b = b->next;
#include <vppinfra/cpu.h>
#include <vlib/vlib.h>
+#if defined(__x86_64__)
#define PERF_MAX_EVENTS 12 /* 4 fixed and 8 programable on ICX */
+#endif
typedef enum
{
} perfmon_instance_type_t;
struct perfmon_source;
-extern vlib_node_function_t *perfmon_dispatch_wrappers[PERF_MAX_EVENTS + 1];
+typedef struct perfmon_bundle perfmon_bundle_t;
typedef clib_error_t *(perfmon_source_init_fn_t) (vlib_main_t *vm,
struct perfmon_source *);
typedef perfmon_event_type_t (perfmon_source_get_event_type) (u32 event);
+typedef u8 (perfmon_source_bundle_support_t) (perfmon_bundle_t *);
+typedef clib_error_t *(perfmon_source_config_dispatch_wrapper_t) (
+ perfmon_bundle_t *b, vlib_node_function_t **dispatch_wrapper);
typedef struct perfmon_source
{
format_function_t *format_config;
perfmon_source_get_event_type *get_event_type;
perfmon_source_init_fn_t *init_fn;
+ perfmon_source_bundle_support_t *bundle_support;
+ perfmon_source_config_dispatch_wrapper_t *config_dispatch_wrapper;
} perfmon_source_t;
-struct perfmon_bundle;
-
typedef clib_error_t *(perfmon_bundle_init_fn_t) (vlib_main_t *vm,
struct perfmon_bundle *);
Code Review / vpp.git / commitdiff