[ltt-dev] General Questions

[Michel Dagenais]

> I'm looking into an issue where fsync() is being called repeatedly by
> an application but some of those fsync() calls stall sometimes. Would
> LTT be useful for trying to see what is happening inside the kernel
> that causes those fsync() calls to stall?

Yes, very much! Fsync is relatively infrequent and easy to search for in
a trace. From there you need the detailed scheduling information to
understand why it is blocking, which is exactly what LTT will give you.