Orbit: C/C++ Performance Profiler

by dosshell • 2 years ago

209 59 2 years ago

elromulous2• 2 years ago

As a xoogler who's wanted to use this and invest in it, I'm curious about the state it's in. Google has been investing in perfetto, this is different, but has some redundancy. It would would be nice to know this isn't abandonware.

sjwhevvvvvsj3• 2 years ago

Looks like it may have been stadia related.

wmf• 2 years ago

Ah, I was wondering why Google would develop a profiler with Wine/Proton support.

OlivierLi2• 2 years ago

Using some scripts/parsers to take DTrace/perf/Instruments/ETW data and transfer it to perfetto was one of the most exciting moments of my performance engineering career. It’s such a powerful thing compared to every single other workflow I’ve ever used.

It just shows contention in a way that so hard to see otherwise.

If this tool packages some of that in an easier to use package it’s going to be a great tool for some.

protomolecule2• 2 years ago

"It just shows contention in a way that so hard to see otherwise."

Could you elaborated on this? I've never used it myself.

Ygg2• 2 years ago

I'm curious how does it work on Windows?

winrid• 2 years ago

It looks like all the top contributors no longer work on it much, based on github's insights.

pzo• 2 years ago

at least looks like they dropping support for windows

"Orbit's focus has shifted to the Linux version. Windows local profiling is currently only supported partially and major features, such as dynamic instrumentation, are not yet implemented. It is possible however to profile Linux executables from a Windows UI instance. For Windows local profiling, you can still use the released binaries, but please note that they are deprecated and mostly undocumented."

jonstewart2• 2 years ago

What’s the difference between this and libprofile in GPT? Just earlier in its transition to Google abandonware?

rvnx• 2 years ago

According to the presentation video, it is a profiling tool used for Stadia Games ( https://www.youtube.com/watch?v=8V-EPBPGZPs ) that can adapt to Unity and Unreal Engine. Which seems to make sense as the original developer has experience developing on video games.

The main selling point of the tool is Dynamic instrumentation, which allows you to generate Flame charts without manual code annotation (you pick functions that you are interested into, and the profiler adds a hook to these functions in order to log the entry+exit time).

jonstewart2• 2 years ago

That’s what libprofiler does, too, sample the stack during runs.

dataflow2• 2 years ago

At first glance - how is this different from VTune?

paulddraper• 2 years ago

dataflow2• 2 years ago

Huh? Isn't their most recent release 2024.0.1? https://www.intel.com/content/www/us/en/developer/articles/r...

vient• 2 years ago

Last VTune release was three months ago, can you elaborate?

zokier2• 2 years ago

Its foss, vtune is proprietary.

nnevatie• 2 years ago

Considering Stadia's demise, is orbit dead as well?

Ono-Sendai3• 2 years ago

There's a bunch of really good C++ profilers already. My current favourite is Tracy: https://github.com/wolfpld/tracy

forrestthewoods2• 2 years ago

Tracy and Superluminal.

Ono-Sendai3• 2 years ago

Superluminal is great as well. I currently prefer Tracy because it gives faster profiling feedback.

latenightcoding• 2 years ago

Not if you are on macOS, the number of available profilers drops after every release. Same with leak detectors, valgrind doesnt work, sanitizers don't work anymore (even if you compile your own clang).

saagarjha• 2 years ago

Apple mostly keeps their sanitizers up-to-date? Not that it’s really a profiler, to be honest.

mmastrac• 2 years ago

samply is pretty sweet. It's been my go-to for Deno work for the last year or so.

Ono-Sendai3• 2 years ago

Sanitizers only sometimes work on Windows too :)

1over137• 2 years ago

It took Apple a long time to bring ASan and TSan to macOS, but they work now, for me at least. (MSan still unavailable though).

interroboink• 2 years ago

At least in the specific case of Tracy, you can profile over the network. So, you instrument your OSX application, and it streams its data in realtime to your profiler viewer.

Though it's true that more advanced features require OS support (eg: showing how threads get moved amongst CPU cores, and so on).

optymizer• 2 years ago

I found that you can use the 'leaks' command to replace vlgrind memcheck

tempodox• 2 years ago

Both address sanitizer and UB sanitizer work for me (macOS-13.6, Intel). You have to add a library search path and the appropriate `libclang_rt.*` library to your build.

Library search path is `/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/1[4-9].[0-9].[0-9]/lib/darwin`.

Sesse__• 2 years ago

Is there _any_ usable profiler on macOS? I've found Instruments to be straight-up useless (very slow, frequently gives just plain wrong results on larger projects) and pretty much every search I've tried just gives “use Instruments”.

eclectic29• 2 years ago

Any googlers chime in? Is this any good? Or just a dump of one of their internal unused products?

signa11• 2 years ago

i don't really think there is _anything_ that comes even close to tracy https://github.com/wolfpld/tracy.

on top of this, given google's penchant for dumping projects aka abandonware, this would be an easy pass.

cmovq• 2 years ago

What surprised me about Tracy was just how easy it was to include in a C++ project. Just compile and link a single .cpp file (TracyClient.cpp)

Jamie9912• 2 years ago

Orbit doesn't require you to change any code at all, according to their readme

Veserv• 2 years ago

Does tracy support automatic function entry/exit (FEE) traces (i.e. all functions are automatically instrumented with a start/end)? The documentation seems to indicate traces are all manual which is pretty inconvenient. There are very few cases where you even need manual instrumentation if you have FEE data from my experience.

zokier2• 2 years ago

What about vtune? I was under the impression that it is pretty much the state of art in profiling

maccard• 2 years ago

ETW Traces are the gold standard for most uses IMO - https://randomascii.wordpress.com/2015/09/24/etw-central/.

For architecture specific profiling, Vtune is still pretty good though.

sahlab2• 2 years ago

Tracy is amazing. Having just integrated it into a major project, it's leaps and bounds above what we were using previously.

mvelbaum• 2 years ago

Can anyone suggest a good non-sampling profiler for low latency apps? The only one I can think of is https://github.com/morganstanley/Xpedite but it's not even clear that it is being maintained anymore.

DeathArrow• 2 years ago

It supports native applications written in languages such as C, C++, Rust, or Go.

Seeing it supports Go, I wonder if it supports other AoT compiled languages with garbage collectors, like .NET.

Gupie• 2 years ago

VTunes can tell you the average time that functions take to run but which tools can highlight functions that very occasionally run a lot slower than normal?

yb303• 2 years ago

Why does it sound like a remake of FlameGraph?

Orbit: C/C++ Performance Profiler

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