Re: [HACKERS] Dynamic instrumentation of lwlock wait times (lwlock flamegraphs)

> On 23 Jun 2017, at 00:08, Andres Freund wrote: > > Hi, > > At pgcon some people were talking about the difficulty of instrumenting > the time actually spent waiting for lwlocks and related measurements. > I'd mentioned that linux these days provides infrastructure to

[HACKERS] Dynamic instrumentation of lwlock wait times (lwlock flamegraphs)

Hi, At pgcon some people were talking about the difficulty of instrumenting the time actually spent waiting for lwlocks and related measurements. I'd mentioned that linux these days provides infrastructure to measure such things in unmodified binaries. Attached is a prototype of a script that