diff options
Diffstat (limited to 'src/plugins/perfmon/intel/uncore.c')
| -rw-r--r-- | src/plugins/perfmon/intel/uncore.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/plugins/perfmon/intel/uncore.c b/src/plugins/perfmon/intel/uncore.c new file mode 100644 index 00000000000..e8939cb67c9 --- /dev/null +++ b/src/plugins/perfmon/intel/uncore.c @@ -0,0 +1,182 @@ +/* + * Copyright (c) 2020 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. + */ + +#include <vnet/vnet.h> +#include <vppinfra/linux/sysfs.h> +#include <perfmon/perfmon.h> +#include <perfmon/intel/core.h> +#include <perfmon/intel/uncore.h> + +VLIB_REGISTER_LOG_CLASS (if_intel_uncore_log, static) = { + .class_name = "perfmon", + .subclass_name = "intel-uncore", +}; + +#define log_debug(fmt, ...) \ + vlib_log_debug (if_intel_uncore_log.class, fmt, __VA_ARGS__) +#define log_warn(fmt, ...) \ + vlib_log_warn (if_intel_uncore_log.class, fmt, __VA_ARGS__) +#define log_err(fmt, ...) \ + vlib_log_err (if_intel_uncore_log.class, fmt, __VA_ARGS__) + +#define PERF_INTEL_CODE(event, umask, edge, any, inv, cmask) \ + ((event) | (umask) << 8 | (edge) << 18 | (any) << 21 | (inv) << 23 | \ + (cmask) << 24) + +static perfmon_event_t intel_uncore_events[] = { +#define _(unit, event, umask, n, suffix, desc) \ + [INTEL_UNCORE_E_##unit##_##n##_##suffix] = { \ + .config = (event) | (umask) << 8, \ + .name = #n "." #suffix, \ + .description = desc, \ + .type_from_instance = 1, \ + .instance_type = INTEL_UNCORE_UNIT_##unit, \ + }, + + foreach_intel_uncore_event +#undef _ +}; + +static int +intel_uncore_instance_name_cmp (void *v1, void *v2) +{ + perfmon_instance_t *i1 = v1; + perfmon_instance_t *i2 = v2; + return strcmp (i1->name, i2->name); +} + +static void +intel_uncore_add_unit (perfmon_source_t *src, intel_uncore_unit_type_t u, + char *name, char *type_str, char *fmt, + int *socket_by_cpu_id) +{ + static char *base_path = "/sys/bus/event_source/devices/uncore"; + clib_error_t *err; + clib_bitmap_t *cpumask = 0; + perfmon_instance_t *in; + perfmon_instance_type_t *it; + u8 *s = 0; + int i = 0, j; + u32 perf_type; + + vec_validate (src->instances_by_type, u); + it = vec_elt_at_index (src->instances_by_type, u); + it->name = type_str; + + while (1) + { + s = format (s, "%s_%s_%u/type%c", base_path, name, i, 0); + if ((err = clib_sysfs_read ((char *) s, "%u", &perf_type))) + break; + vec_reset_length (s); + + s = format (s, "%s_%s_%u/cpumask%c", base_path, name, i, 0); + if ((err = clib_sysfs_read ((char *) s, "%U", unformat_bitmap_list, + &cpumask))) + break; + vec_reset_length (s); + + clib_bitmap_foreach (j, cpumask) + { + vec_add2 (it->instances, in, 1); + in->type = perf_type; + in->cpu = j; + in->pid = -1; + in->name = (char *) format (0, fmt, socket_by_cpu_id[j], i); + vec_terminate_c_string (in->name); + log_debug ("found %s %s", type_str, in->name); + } + i++; + }; + clib_error_free (err); + clib_bitmap_free (cpumask); + vec_free (s); +} + +static clib_error_t * +intel_uncore_init (vlib_main_t *vm, perfmon_source_t *src) +{ + clib_error_t *err = 0; + clib_bitmap_t *node_bitmap = 0, *cpumask = 0; + int *numa_by_cpu_id = 0; + u32 i, j; + u8 *s = 0; + + if ((err = clib_sysfs_read ("/sys/devices/system/node/has_cpu", "%U", + unformat_bitmap_list, &node_bitmap))) + { + clib_error_free (err); + return clib_error_return (0, "failed to discover numa topology"); + } + + clib_bitmap_foreach (i, node_bitmap) + { + s = format (s, "/sys/devices/system/node/node%u/cpulist%c", i, 0); + if ((err = clib_sysfs_read ((char *) s, "%U", unformat_bitmap_list, + &cpumask))) + { + clib_error_free (err); + err = clib_error_return (0, "failed to discover numa topology"); + goto done; + } + + clib_bitmap_foreach (j, cpumask) + { + vec_validate_init_empty (numa_by_cpu_id, j, -1); + numa_by_cpu_id[j] = i; + } + clib_bitmap_free (cpumask); + vec_reset_length (s); + } + +#define _(t, n, name, fmt) \ + intel_uncore_add_unit (src, INTEL_UNCORE_UNIT_##t, n, name, fmt, \ + numa_by_cpu_id); + foreach_intel_uncore_unit_type; +#undef _ + + for (i = 0, j = 0; i < vec_len (src->instances_by_type); i++) + { + perfmon_instance_type_t *it; + + it = vec_elt_at_index (src->instances_by_type, i); + vec_sort_with_function (it->instances, intel_uncore_instance_name_cmp); + j += vec_len (it->instances); + } + + if (j == 0) + { + vec_free (src->instances_by_type); + return clib_error_return (0, "no uncore units found"); + } + +done: + vec_free (s); + vec_free (cpumask); + vec_free (node_bitmap); + vec_free (numa_by_cpu_id); + return err; +} + +format_function_t format_intel_core_config; + +PERFMON_REGISTER_SOURCE (intel_uncore) = { + .name = "intel-uncore", + .description = "intel uncore events", + .events = intel_uncore_events, + .n_events = INTEL_UNCORE_N_EVENTS, + .init_fn = intel_uncore_init, + .format_config = format_intel_core_config, +}; |