GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  ET_SELECTOR (3)

NAME

et_selector - Define event transforms and trace patterns

CONTENTS

Description
Exports

DESCRIPTION

EXPORTS

make_pattern(RawPattern) -> TracePattern

Types:

RawPattern = detail_level()
TracePattern = erlang_trace_pattern_match_spec()
detail_level() = min | max | integer(X) when X >= 0, X =< 100

Makes a trace pattern suitable to feed change_pattern/1

Min detail level deactivates tracing of calls to et:trace_me/4,5

Max detail level activates tracing of all calls to et:trace_me/4,5

integer(X) detail level activates tracing of all calls to et:trace_me/4,5 whose detail level argument is lesser than X.

See also erlang:trace_pattern/2 for more info about its match_spec()

change_pattern(Pattern) -> ok

Types:

Pattern = detail_level() | empty_match_spec() | erlang_trace_pattern_match_spec()
detail_level() = min | max | integer(X) when X >= 0, X =< 100
empty_match_spec() = []

Activates/deactivates tracing by changing the current trace pattern.

min detail level deactivates tracing of calls to et:trace_me/4,5

max detail level activates tracing of all calls to et:trace_me/4,5

integer(X) detail level activates tracing of all calls to et:trace_me/4,5 whose detail level argument is lesser than X.

An empty match spec deactivates tracing of calls to et:trace_me/4,5

Other match specs activates tracing of calls to et:trace_me/4,5 accordingly with erlang:trace_pattern/2.

parse_event(Mod, ValidTraceData) -> false | true | {true, Event}

Types:

Mod = module_name() | undefined <v>module_name() = atom() <v>ValidTraceData = erlang_trace_data() | record(event)
erlang_trace_data() = {trace, Pid, Label, Info} | {trace, Pid, Label, Info, Extra} | {trace_ts, Pid, Label, Info, ReportedTS} | {trace_ts, Pid, Label, Info, Extra, ReportedTS} | {seq_trace, Label, Info} | {seq_trace, Label, Info, ReportedTS} | {drop, NumberOfDroppedItems}

Transforms trace data and makes an event record out of it.

See erlang:trace/3 for more info about the semantics of the trace data.

An event record consists of the following fields:

detail_level: Noise has a high level as opposed to essentials.
trace_ts: Time when the trace was generated. Same as event_ts if omitted in trace data.
event_ts: Time when the event record was created.
from: From actor, such as sender of a message.
to: To actor, such as receiver of message.
label: Label intended to provide a brief event summary.
contents: All nitty gritty details of the event.

See et:trace_me/4and et:trace_me/5 for details.

Returns:

{true, Event}: where Event is an #event{} record representing the trace data
true: means that the trace data already is an event record and that it is valid as it is. No transformation is needed.
false: means that the trace data is uninteresting and should be dropped
Search for    or go to Top of page |  Section 3 |  Main Index


Ericsson AB ET_SELECTOR (3) et 1.5.1

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.