Man page - tep_get_sub_buffer_size(3)
Packages contains this manual
- tep_plugin_kvm_put_func(3)
- tep_register_event_handler(3)
- trace_seq_do_fprintf(3)
- tep_print_func_field(3)
- tep_set_file_bigendian(3)
- trace_seq_reset(3)
- tep_filter_free(3)
- tep_ref(3)
- tep_list_events_copy(3)
- tep_get_any_field_val(3)
- kbuffer_missed_events(3)
- tep_load_plugins_hook(3)
- tep_set_page_size(3)
- kbuffer_event_size(3)
- tep_filter_strerror(3)
- tep_print_event(3)
- kbuffer_subbuffer(3)
- tep_set_test_filters(3)
- kbuffer_read_event(3)
- tep_filter_reset(3)
- tep_filter_compare(3)
- tep_kbuffer(3)
- tep_data_pid_from_comm(3)
- tep_find_any_field(3)
- tep_list_events(3)
- tep_get_long_size(3)
- tep_data_pid(3)
- tep_clear_flag(3)
- tep_get_sub_buffer_size(3)
- tep_print_field_content(3)
- tep_get_first_event(3)
- kbuffer_alloc(3)
- tep_find_function(3)
- tep_get_header_page_size(3)
- tep_register_comm(3)
- trace_seq_putc(3)
- kbuffer_curr_index(3)
- kbuffer_refresh(3)
- tep_record_is_event(3)
- tep_parse_kallsyms(3)
- tep_print_printk(3)
- tep_event_fields(3)
- tep_find_function_info(3)
- tep_get_events_count(3)
- tep_read_number(3)
- trace_seq_vprintf(3)
- tep_get_field_val(3)
- tep_set_function_resolver(3)
- tep_parse_saved_cmdlines(3)
- tep_parse_header_page(3)
- tep_get_page_size(3)
- tep_override_comm(3)
- tep_data_flags(3)
- kbuffer_subbuf_timestamp(3)
- kbuffer_subbuffer_size(3)
- tep_get_ref(3)
- tep_get_event(3)
- tep_alloc(3)
- tep_is_old_format(3)
- tep_find_event(3)
- kbuffer_dup(3)
- tep_unref(3)
- trace_seq_destroy(3)
- trace_seq_init(3)
- trace_seq_terminate(3)
- kbuffer_curr_offset(3)
- tep_get_field_raw(3)
- tep_plugin_kvm_get_func(3)
- tep_set_cpus(3)
- tep_set_local_bigendian(3)
- tep_data_comm_from_pid(3)
- tep_event_common_fields(3)
- tep_plugin_add_option(3)
- tep_test_flag(3)
- tep_filter_make_string(3)
- tep_unregister_event_handler(3)
- kbuffer_curr_size(3)
- tep_find_event_by_record(3)
- tep_filter_remove_event(3)
- tep_print_num_field(3)
- tep_cmdline_pid(3)
- tep_free(3)
- tep_get_sub_buffer_data_size(3)
- tep_load_plugins(3)
- tep_print_fields(3)
- tep_register_function(3)
- tep_record_print_fields(3)
- kbuffer_load_subbuffer(3)
- tep_data_preempt_count(3)
- tep_find_common_field(3)
- tep_find_event_by_name(3)
- tep_set_long_size(3)
- tep_reset_function_resolver(3)
- tep_filter_alloc(3)
- kbuffer_timestamp(3)
- tep_find_field(3)
- tep_get_header_timestamp_size(3)
- tep_plugin_print_options(3)
- trace_seq_printf(3)
- tep_set_flag(3)
- tep_unload_plugins(3)
- tep_is_bigendian(3)
- trace_seq_puts(3)
- kbuffer_read_buffer(3)
- tep_unregister_print_function(3)
- tep_get_cpus(3)
- tep_get_common_field_val(3)
- kbuffer_start_of_data(3)
- tep_is_local_bigendian(3)
- tep_print_funcs(3)
- tep_is_file_bigendian(3)
- tep_filter_copy(3)
- tep_set_loglevel(3)
- tep_filter_add_filter_str(3)
- tep_data_type(3)
- tep_register_print_string(3)
- tep_filter_match(3)
- kbuffer_next_event(3)
- tep_read_number_field(3)
- tep_get_function_count(3)
- tep_find_function_address(3)
- tep_add_plugin_path(3)
- tep_parse_event(3)
- trace_seq_do_printf(3)
- kbuffer_free(3)
- tep_record_print_selected_fields(3)
- tep_parse_printk_formats(3)
- libtraceevent(3)
- tep_is_pid_registered(3)
- tep_parse_format(3)
- tep_strerror(3)
- tep_register_print_function(3)
- tep_event_filtered(3)
apt-get install libtraceevent-doc
Manual
LIBTRACEEVENT
NAMESYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
FILES
SEE ALSO
AUTHOR
REPORTING BUGS
LICENSE
RESOURCES
NOTES
NAME
tep_get_page_size, tep_set_page_size, tep_get_sub_buffer_data_size, tep_get_sub_buffer_size - Get / set the size of a memory page on the machine, where the trace is generated
SYNOPSIS
#include <event-parse.h>
int
tep_get_page_size
(struct tep_handle *
tep
);
void
tep_set_page_size
(struct tep_handle *
tep
,
int
page_size
);
int
tep_get_sub_buffer_size
(struct tep_handle
*
tep
);
int
tep_get_sub_buffer_data_size
(struct tep_handle
*
tep
);
int
tep_get_sub_buffer_commit_offset
(struct
tep_handle *
tep
);
DESCRIPTION
The tep_get_page_size() function returns the size of a memory page on the machine, where the trace is generated. The tep argument is trace event parser context.
The tep_set_page_size() function stores in the tep context the size of a memory page on the machine, where the trace is generated. The tep argument is trace event parser context. The page_size argument is the size of a memory page, in bytes.
The tep_get_sub_buffer_size() returns the size of each "sub buffer" of the ring buffer. The Linux kernel ring buffer is broken up into sections called sub buffers. This returns the size of those buffers.
The tep_get_sub_buffer_data_size() returns the size of just the data portion of the sub buffers.
The tep_get_sub_buffer_commit_offset() returns the offset on the sub buffer that holds the committed portion of data. This number contains the index from the data portion of the sub buffer that is the end of the last element on the sub buffer.
RETURN VALUE
The tep_get_page_size() function returns size of the memory page, in bytes.
The tep_get_sub_buffer_size() function returns the number of bytes each sub buffer is made up of.
The tep_get_sub_buffer_commit_offset() function returns the location on the sub buffer that contains the index of the last element.
EXAMPLE
#include
<unistd.h>
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int page_size = getpagesize();
tep_set_page_size(tep, page_size);
printf("The page size for this machine is %d\n", tep_get_page_size(tep));
FILES
event-parse.h
Header file to include in order to have access to the
library APIs.
-ltraceevent
Linker switch to add when building a program that uses the
library.
SEE ALSO
libtraceevent (3), trace-cmd (1)
AUTHOR
Steven
Rostedt
<
rostedt@goodmis.org
[1]
>, author of
libtraceevent
.
Tzvetomir Stoyanov
<
tz.stoyanov@gmail.com
[2]
>, author of this man
page.
REPORTING BUGS
Report bugs to < linux-trace-devel@vger.kernel.org [3] >
LICENSE
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
NOTES
|
1. |
rostedt@goodmis.org |
mailto:rostedt@goodmis.org
|
2. |
tz.stoyanov@gmail.com |
mailto:tz.stoyanov@gmail.com
|
3. |
linux-trace-devel@vger.kernel.org |
mailto:linux-trace-devel@vger.kernel.org