cargo-profiler

Cargo subcommand to profile binaries.

To install

NOTE: This subcommand can only be used on Linux machines.

First install valgrind:

$ sudo apt-get install valgrind

Then you can install cargo-profiler via cargo install.

Alternatively, you can clone this repo and build the binary from the source.

$ cargo build --release

Now, copy the built binary to the same directory as cargo.

$ sudo cp ./target/release/cargo-profiler $(dirname $(which cargo))/

To run

Cargo profiler currently supports callgrind and cachegrind.

$ cargo profiler callgrind --bin $PATH_TO_BINARY $ cargo profiler cachegrind --bin $PATH_TO_BINARY

You can limit the number of functions you'd like to look at:

``` $ cargo profiler callgrind --bin ./target/debug/rsmat -n 10

Profiling rsmat with callgrind...

Total Instructions...198,466,456

78,346,775 (39.5%) dgemmkernel.rs:matrixmultiply::gemm::maskedkernel

23,528,320 (11.9%) iter.rs:_..std..ops..Range..A....as..std..iter..Iterator..::next

16,824,925 (8.5%) loopmacros.rs:matrixmultiply::gemm::masked_kernel

10,236,864 (5.2%) mem.rs:core::mem::swap

7,712,846 (3.9%) memset.S:memset

7,197,344 (3.6%) ???:core::cmp::impls::_..impl..cmp..PartialOrd..for..usize..::lt

6,979,680 (3.5%) ops.rs:_..usize..as..ops..Add..::add

```

With cachegrind, you can also sort the data by a particular metric column:

``` $ cargo profiler cachegrind --bin ./target/debug/rsmat -n 10 --sort dr

Profiling rsmat with cachegrind...

Total Memory Accesses...320,385,356

Total L1 I-Cache Misses...371 (0%) Total LL I-Cache Misses...308 (0%) Total L1 D-Cache Misses...58,549 (0%) Total LL D-Cache Misses...8,451 (0%)

Ir I1mr ILmr Dr D1mr LLmr Dw D1mw LLmw

0.40 0.18 0.21 0.35 0.93 1.00 0.38 0.00 0.00 dgemmkernel.rs:matrixmultiply::gemm::maskedkernel

0.08 0.04 0.05 0.12 0.00 0.00 0.02 0.00 0.00 loopmacros.rs:matrixmultiply::gemm::masked_kernel

0.12 0.02 0.02 0.10 0.00 0.00 0.15 0.00 0.00 iter.rs:_std..ops..RangeAasstd..iter..Iterator::next

0.05 0.01 0.01 0.07 0.00 0.00 0.08 0.00 0.00 mem.rs:core::mem::swap

0.03 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 ???:core::cmp::impls::_implcmp..PartialOrdforusize::lt

0.03 0.01 0.01 0.04 0.00 0.00 0.03 0.00 0.00 ops.rs:_busizeasops..Addausize::add

0.04 0.01 0.01 0.04 0.00 0.00 0.03 0.00 0.00 ptr.rs:core::ptr::_implconstT::offset

0.02 0.01 0.00 0.03 0.00 0.00 0.01 0.00 0.00 ???:_usizeasops..Add::add

0.01 0.01 0.01 0.02 0.00 0.00 0.01 0.00 0.00 mem.rs:core::mem::uninitialized

0.02 0.01 0.01 0.02 0.00 0.00 0.04 0.00 0.00 wrapping.rs:XorShiftRngasRng::nextu32

```

TODO

• cmp subcommand - compare binary profiles