-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* lttng-context-perf-counters.c
*
* LTTng performance monitoring counters (perf-counters) integration module.
*
* Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/cpu.h>
#include <lttng-events.h>
#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/cpu.h>
#include <wrapper/vmalloc.h>
#include <wrapper/perf.h>
#include <lttng-tracer.h>
chan->ops->event_write(ctx, &value, sizeof(value));
}
-#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,99))
+#if defined(CONFIG_PERF_EVENTS) && (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0))
static
void overflow_callback(struct perf_event *event,
struct perf_sample_data *data,
{
struct perf_event **events = field->u.perf_counter->e;
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
{
int ret;
&field->u.perf_counter->cpuhp_prepare.node);
WARN_ON(ret);
}
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
{
int cpu;
- get_online_cpus();
+ lttng_cpus_read_lock();
for_each_online_cpu(cpu)
perf_event_release_kernel(events[cpu]);
- put_online_cpus();
+ lttng_cpus_read_unlock();
#ifdef CONFIG_HOTPLUG_CPU
unregister_cpu_notifier(&field->u.perf_counter->nb);
#endif
}
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
kfree(field->event_field.name);
kfree(field->u.perf_counter->attr);
lttng_kvfree(events);
kfree(field->u.perf_counter);
}
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
int lttng_cpuhp_perf_counter_online(unsigned int cpu,
struct lttng_cpuhp_node *node)
return 0;
}
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
#ifdef CONFIG_HOTPLUG_CPU
#endif
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
int lttng_add_perf_counter_to_ctx(uint32_t type,
uint64_t config,
goto find_error;
}
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
perf_field->cpuhp_prepare.component = LTTNG_CONTEXT_PERF_COUNTERS;
ret = cpuhp_state_add_instance(lttng_hp_prepare,
if (ret)
goto cpuhp_online_error;
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
{
int cpu;
perf_field->nb.priority = 0;
register_cpu_notifier(&perf_field->nb);
#endif
- get_online_cpus();
+ lttng_cpus_read_lock();
for_each_online_cpu(cpu) {
events[cpu] = wrapper_perf_event_create_kernel_counter(attr,
cpu, NULL, overflow_callback);
goto counter_busy;
}
}
- put_online_cpus();
+ lttng_cpus_read_unlock();
perf_field->hp_enable = 1;
}
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
field->destroy = lttng_destroy_perf_counter_field;
field->u.perf_counter = perf_field;
lttng_context_update(*ctx);
- wrapper_vmalloc_sync_all();
+ wrapper_vmalloc_sync_mappings();
return 0;
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
cpuhp_online_error:
{
int remove_ret;
WARN_ON(remove_ret);
}
cpuhp_prepare_error:
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
counter_busy:
counter_error:
{
if (events[cpu] && !IS_ERR(events[cpu]))
perf_event_release_kernel(events[cpu]);
}
- put_online_cpus();
+ lttng_cpus_read_unlock();
#ifdef CONFIG_HOTPLUG_CPU
unregister_cpu_notifier(&perf_field->nb);
#endif
}
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
find_error:
lttng_remove_context_field(ctx, field);
append_context_error: