Re: 回复： 回复： some tracepoints not exist in metadata?

[Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org>]

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Hi, 

Make sure you use single quotes in your shell around wildcards, else the 
shell will try to expand them to files in the current directory, e.g., you need to do: 

lttng enable-event -u 'system_event*' -c channel0 -s misc_data 

This could very well explain why sometimes your events don't get enabled: if the 
wildcard matches files in the current directory. 

Thanks, 

Mathieu 

----- On Jun 30, 2020, at 11:56 PM, zhenyu.ren <zhenyu.ren@aliyun.com> wrote: 

> Ah, I have to say that I use the wildcard in tracepoint name when enable-event
> to the channel, i.e. ./lttng enable-event -u system_event* -c channel0 -s
> misc_data. Of course, there are the other tracepoints with wildcard succeed in
> registring.

>> ------------------------------------------------------------------
>> 发件人：zhenyu.ren via lttng-dev <lttng-dev@lists.lttng.org>
>> 发送时间：2020年7月1日(星期三) 11:44
>> 收件人：lttng-dev <lttng-dev@lists.lttng.org>; mathieu.desnoyers
>> <mathieu.desnoyers@efficios.com>
>> 主 题：[lttng-dev] 回复： some tracepoints not exist in metadata?

>> I'd like to add that both "lttng list -u" and "lttng list $session_name" can get
>> those tracepoints' names...
>> ------------------------------------------------------------------
>> 发件人：zhenyu.ren via lttng-dev <lttng-dev@lists.lttng.org>
>> 发送时间：2020年7月1日(星期三) 11:05
>> 收件人：lttng-dev <lttng-dev@lists.lttng.org>; mathieu.desnoyers
>> <mathieu.desnoyers@efficios.com>
>> 主 题：[lttng-dev] some tracepoints not exist in metadata?

>> Hi,
>> I find sometimes there are some tracepoints not exist in metadata file(but they
>> are in the list of lttng list -u) and the end result is they can NOT be logged.
>> I can not always reproduce it. It bothered me for 2 days.
>> The lttng version is 2.7, I know it is not the latest version but there are some
>> reasons I can't update it. So, is this a known bug? If yes, It will be very
>> appreciated if you can give me any advice about the bug info(I can cherry pick
>> the correspond fix). Otherwise, maybe I have to give up my favoriate Lttng....

>> Thank you in advance!
>> zhenyu.ren

-- 
Mathieu Desnoyers 
EfficiOS Inc. 
http://www.efficios.com 

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