[lttng-dev] Is it safe to use multiple lfht instances?

[Mathieu Desnoyers]

----- On Nov 13, 2017, at 5:44 AM, Yu Yang <yyangplus at gmail.com> wrote: 

> hello
> I want to implement a multi-tree using lfht in urcu, every node in the tree
> needs a lfht instance to track the children, I'm not sure if it is safe to use
> tree like this in multiple threads environments. thanks in advance.

Yes, the RCU lock-free hash table is multi-thread safe. 

It is also safe to have multiple RCU lfht instances within a given process. An example 
of a program doing that is lttng-tools session daemon. 

Best regards, 

Mathieu 

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