Man page - tep_get_header_timestamp_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_header_page_size, tep_get_header_timestamp_size, tep_is_old_format - Get the data stored in the header page, in kernel context.
SYNOPSIS
#include <event-parse.h>
int
tep_get_header_page_size
(struct tep_handle
*
tep
);
int
tep_get_header_timestamp_size
(struct tep_handle
*
tep
);
bool
tep_is_old_format
(struct tep_handle
*
tep
);
DESCRIPTION
These functions retrieve information from kernel context, stored in tracefs events/header_page. Old kernels do not have header page info, so default values from user space context are used.
The tep_get_header_page_size() function returns the size of a long integer, in kernel context. The tep argument is trace event parser context. This information is retrieved from tracefs events/header_page, "commit" field.
The tep_get_header_timestamp_size() function returns the size of timestamps, in kernel context. The tep argument is trace event parser context. This information is retrieved from tracefs events/header_page, "timestamp" field.
The tep_is_old_format() function returns true if the kernel predates the addition of events/header_page, otherwise it returns false.
RETURN VALUE
The tep_get_header_page_size() function returns the size of a long integer, in bytes.
The tep_get_header_timestamp_size() function returns the size of timestamps, in bytes.
The tep_is_old_format() function returns true, if an old kernel is used to generate the tracing data, which has no event/header_page. If the kernel is new, or tep is NULL, false is returned.
EXAMPLE
#include
<event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int longsize;
int timesize;
bool old;
longsize =
tep_get_header_page_size(tep);
timesize = tep_get_header_timestamp_size(tep);
old = tep_is_old_format(tep);
printf
("%s kernel is used to generate the tracing
data.\n",
old?"Old":"New");
printf("The size of a long integer is %d
bytes.\n", longsize);
printf("The timestamps size is %d bytes.\n",
timesize);
...
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