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 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 >> 发送时间：2020年7月1日(星期三) 11:44 >> 收件人：lttng-dev ; mathieu.desnoyers >> >> 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 >> 发送时间：2020年7月1日(星期三) 11:05 >> 收件人：lttng-dev ; mathieu.desnoyers >> >> 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