1 #ifndef _LTT_CHANNELS_H
2 #define _LTT_CHANNELS_H
5 * Copyright (C) 2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
7 * Dynamic tracer channel allocation.
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <linux/limits.h>
25 //ust// #include <linux/kref.h>
26 //ust// #include <linux/list.h>
29 #include "kernelcompat.h"
30 #include <kcompat/kref.h>
32 #define EVENTS_PER_CHANNEL 65536
34 struct ltt_trace_struct
;
37 struct ltt_channel_struct
{
38 /* First 32 bytes cache-hot cacheline */
39 struct ltt_trace_struct
*trace
;
41 void *trans_channel_data
;
44 unsigned int n_subbufs_order
;
45 unsigned long commit_count_mask
; /*
46 * Commit count mask, removing
47 * the MSBs corresponding to
48 * bits used to represent the
51 /* End of first 32 bytes cacheline */
54 * buffer_begin - called on buffer-switch to a new sub-buffer
55 * @buf: the channel buffer containing the new sub-buffer
57 void (*buffer_begin
) (struct rchan_buf
*buf
,
58 u64 tsc
, unsigned int subbuf_idx
);
60 * buffer_end - called on buffer-switch to a new sub-buffer
61 * @buf: the channel buffer containing the previous sub-buffer
63 void (*buffer_end
) (struct rchan_buf
*buf
,
64 u64 tsc
, unsigned int offset
, unsigned int subbuf_idx
);
65 struct kref kref
; /* Channel transport reference count */
66 unsigned int subbuf_size
;
67 unsigned int subbuf_cnt
;
68 const char *channel_name
;
71 } ____cacheline_aligned
;
73 struct ltt_channel_setting
{
74 unsigned int subbuf_size
;
75 unsigned int subbuf_cnt
;
76 struct kref kref
; /* Number of references to structure content */
77 struct list_head list
;
78 unsigned int index
; /* index of channel in trace channel array */
79 u16 free_event_id
; /* Next event ID to allocate */
83 int ltt_channels_register(const char *name
);
84 int ltt_channels_unregister(const char *name
);
85 int ltt_channels_set_default(const char *name
,
86 unsigned int subbuf_size
,
87 unsigned int subbuf_cnt
);
88 const char *ltt_channels_get_name_from_index(unsigned int index
);
89 int ltt_channels_get_index_from_name(const char *name
);
90 struct ltt_channel_struct
*ltt_channels_trace_alloc(unsigned int *nr_channels
,
93 void ltt_channels_trace_free(struct ltt_channel_struct
*channels
);
94 int _ltt_channels_get_event_id(const char *channel
, const char *name
);
95 int ltt_channels_get_event_id(const char *channel
, const char *name
);
97 #endif /* _LTT_CHANNELS_H */
This page took 0.032766 seconds and 5 git commands to generate.