- Make sure your rust application uses https://github.com/gnzlbg/jemallocator as the global memory allocator (when in doubt, grep
jemallocator
in yourCargo.lock
). - Install
jemalloc
(we'll only needjeprof
),dot
,ps2pdf
andlibunwind
on your system. Enable jemallocator'sprofiling
feature (ifjemallocator
is an indirect dependency, one trick to do is to add a dependencyjemallocator = { version = "*", features = ["profiling"] }
to your app and let cargo select the||
of features for you). export _RJEM_MALLOC_CONF=prof:true,lg_prof_interval:32,lg_prof_sample:19
.lg_prof_interval
sets how often profile dump should be written to disk measured in allocated bytes. The value is passed as a power of two, which is 2^32 in our case, i.e. every 4 GiB of allocations of long-lived objects (see https://github.com/jemalloc/jemalloc/wiki/Use-Case%3A-Heap-Profiling).lg_prof_sample:19
tells jemalloc to take a profiling sample every 2^19 = 512 KiB.- Running your binary should produce a bun
This gist is just a compilation of the hard work that others have put in. I'm not a software developer, so if there are any mistakes or better ways of doing things, I'd appreciate any suggestions. Here's a list of the real heroes who made this possible:
Kernel Patches: aunali (https://github.com/aunali1/)
T2 security chip bypass to allow access to the SSD, keyboard, and trackpad: MCMrARM (https://github.com/MCMrARM)
Audio: kevineinarsson