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/*
* 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 intel_uncore_unit_type_names_t uncore_unit_names[] = {
{ INTEL_UNCORE_UNIT_IIO,
PERFMON_STRINGS ("PCIe0", "PCIe1", "MCP", "PCIe2", "PCIe3", "CBDMA/DMI") }
};
static perfmon_event_t intel_uncore_events[] = {
#define _(unit, event, umask, ch_mask, fc_mask, n, suffix, desc) \
[INTEL_UNCORE_E_##unit##_##n##_##suffix] = { \
.config = \
(event) | (umask) << 8 | (u64) (ch_mask) << 36 | (u64) (fc_mask) << 48, \
.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_always_inline u8 *
format_instance_name (intel_uncore_unit_type_t u, char *unit_fmt, u8 socket_id,
u8 ubox)
{
u8 *s = 0;
/* uncore ubox may have specific names */
for (u8 i = 0; i < ARRAY_LEN (uncore_unit_names); i++)
{
intel_uncore_unit_type_names_t *n = &uncore_unit_names[i];
if (n->unit_type == u)
{
u8 *fmt = 0;
fmt = format (0, "%s (%s)%c", unit_fmt, (n->unit_names[ubox]), 0);
s = format (0, (char *) fmt, socket_id, ubox);
vec_free (fmt);
return s;
}
}
return format (0, unit_fmt, socket_id, ubox);
}
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_instance_name (u, 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/online", "%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;
}
if (!cpumask)
{
clib_error_free (err);
err = clib_error_return (
0, "while discovering numa topology: cpumask unexpectedly NULL");
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,
};
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