-#ifndef _LINUX_RING_BUFFER_FRONTEND_TYPES_H
-#define _LINUX_RING_BUFFER_FRONTEND_TYPES_H
-
-/*
- * linux/ringbuffer/frontend_types.h
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
*
- * (C) Copyright 2005-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lib/ringbuffer/frontend_types.h
*
* Ring Buffer Library Synchronization Header (types).
*
- * Author:
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* See ring_buffer_frontend.c for more information on wait-free algorithms.
- *
- * Dual LGPL v2.1/GPL v2 license.
*/
+#ifndef _LIB_RING_BUFFER_FRONTEND_TYPES_H
+#define _LIB_RING_BUFFER_FRONTEND_TYPES_H
+
#include <linux/kref.h>
-#include "../../wrapper/ringbuffer/config.h"
-#include "../../wrapper/ringbuffer/backend_types.h"
-#include "../../wrapper/prio_heap.h" /* For per-CPU read-side iterator */
+#include <wrapper/ringbuffer/config.h>
+#include <wrapper/ringbuffer/backend_types.h>
+#include <lib/prio_heap/lttng_prio_heap.h> /* For per-CPU read-side iterator */
+#include <lttng-cpuhotplug.h>
/*
* A switch is done during tracing or as a final flush after tracing (so it
/* channel-level read-side iterator */
struct channel_iter {
/* Prio heap of buffers. Lowest timestamps at the top. */
- struct ptr_heap heap; /* Heap of struct lib_ring_buffer ptrs */
+ struct lttng_ptr_heap heap; /* Heap of struct lib_ring_buffer ptrs */
struct list_head empty_head; /* Empty buffers linked-list head */
int read_open; /* Opened for reading ? */
u64 last_qs; /* Last quiescent state timestamp */
unsigned long switch_timer_interval; /* Buffer flush (jiffies) */
unsigned long read_timer_interval; /* Reader wakeup (jiffies) */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+ struct lttng_cpuhp_node cpuhp_prepare;
+ struct lttng_cpuhp_node cpuhp_online;
+ struct lttng_cpuhp_node cpuhp_iter_online;
+#else
struct notifier_block cpu_hp_notifier; /* CPU hotplug notifier */
- struct notifier_block tick_nohz_notifier; /* CPU nohz notifier */
struct notifier_block hp_iter_notifier; /* hotplug iterator notifier */
- int cpu_hp_enable:1; /* Enable CPU hotplug notif. */
- int hp_iter_enable:1; /* Enable hp iter notif. */
+ unsigned int cpu_hp_enable:1; /* Enable CPU hotplug notif. */
+ unsigned int hp_iter_enable:1; /* Enable hp iter notif. */
+#endif
+ struct notifier_block tick_nohz_notifier; /* CPU nohz notifier */
wait_queue_head_t read_wait; /* reader wait queue */
+ wait_queue_head_t hp_wait; /* CPU hotplug wait queue */
+ int finalized; /* Has channel been finalized */
struct channel_iter iter; /* Channel read-side iterator */
struct kref ref; /* Reference count */
};
ITER_NEXT_RECORD,
ITER_PUT_SUBBUF,
} state;
- int allocated:1;
- int read_open:1; /* Opened for reading ? */
+ unsigned int allocated:1;
+ unsigned int read_open:1; /* Opened for reading ? */
};
/* ring buffer state */
struct commit_counters_cold *commit_cold;
/* Commit count per sub-buffer */
+ u64 *ts_end; /*
+ * timestamp_end per sub-buffer.
+ * Time is sampled by the
+ * switch_*_end() callbacks which
+ * are the last space reservation
+ * performed in the sub-buffer
+ * before it can be fully
+ * committed and delivered. This
+ * time value is then read by
+ * the deliver callback,
+ * performed by the last commit
+ * before the buffer becomes
+ * readable.
+ */
atomic_long_t active_readers; /*
* Active readers count
* standard atomic access (shared)
union v_atomic records_count; /* Number of records written */
union v_atomic records_overrun; /* Number of overwritten records */
wait_queue_head_t read_wait; /* reader buffer-level wait queue */
+ wait_queue_head_t write_wait; /* writer buffer-level wait queue (for metadata only) */
int finalized; /* buffer has been finalized */
struct timer_list switch_timer; /* timer for periodical switch */
struct timer_list read_timer; /* timer for read poll */
unsigned long get_subbuf_consumed; /* Read-side consumed */
unsigned long prod_snapshot; /* Producer count snapshot */
unsigned long cons_snapshot; /* Consumer count snapshot */
- int get_subbuf:1; /* Sub-buffer being held by reader */
- int switch_timer_enabled:1; /* Protected by ring_buffer_nohz_lock */
- int read_timer_enabled:1; /* Protected by ring_buffer_nohz_lock */
+ unsigned int get_subbuf:1, /* Sub-buffer being held by reader */
+ switch_timer_enabled:1, /* Protected by ring_buffer_nohz_lock */
+ read_timer_enabled:1, /* Protected by ring_buffer_nohz_lock */
+ quiescent:1;
};
static inline
return chan->backend.priv;
}
+void lib_ring_buffer_lost_event_too_big(struct channel *chan);
+
/*
* Issue warnings and disable channels upon internal error.
* Can receive struct lib_ring_buffer or struct lib_ring_buffer_backend
_____ret; \
})
-#endif /* _LINUX_RING_BUFFER_FRONTEND_TYPES_H */
+#endif /* _LIB_RING_BUFFER_FRONTEND_TYPES_H */
projects / lttng-modules.git / blobdiff