On Friday, 4 November 2016 at 17:40:05 UTC, Andrei Alexandrescu
wrote:
On 11/04/2016 01:12 PM, Andrei Alexandrescu wrote:
So I'm working on the checkedint pull request (really need to
get that
in...) and was trying to get some benchmarks going with ldc.
The stock
ldc on mint is outdated and it can't compile the code, so I
needed to do
a self-installation. I've put it in
~/bin/ldc2-1.1.0-beta3-linux-x86. Then:
$ PATH=~/bin/ldc2-1.1.0-beta3-linux-x86/bin:$PATH
Found the problem, sorry for the distraction. I'd downloaded
the 32-bit version not the 64-bit one. I got it working with
the right download.
BTW the benchmark results have been pretty good:
======================================
Running trialPrimes() benchmark...
int: 37 ms, 789 μs, and 8
hnsecs
Checked!(int, void): 25 ms and 398 μs
Checked!(int, Warn): 64 ms, 653 μs, and 9
hnsecs
uint: 42 ms, 361 μs, and 1
hnsec
Checked!(uint, void): 42 ms, 49 μs, and 5
hnsecs
Checked!(uint, Warn): 72 ms, 322 μs, and 7
hnsecs
long: 67 ms and 893 μs
Checked!(long, void): 54 ms, 512 μs, and 3
hnsecs
Checked!(long, Warn): 91 ms and 932 μs
ulong: 69 ms and 567 μs
Checked!(ulong, void): 69 ms, 136 μs, and 4
hnsecs
Checked!(ulong, Warn): 95 ms, 196 μs, and 7
hnsecs
DONE
Running collatzSort() benchmark...
int: 43 ms, 967 μs, and 9
hnsecs
Checked!(int, void): 44 ms, 104 μs, and 8
hnsecs
Checked!(int, Warn): 81 ms, 833 μs, and 1
hnsec
uint: 43 ms, 398 μs, and 3
hnsecs
Checked!(uint, void): 43 ms, 560 μs, and 6
hnsecs
Checked!(uint, Warn): 82 ms, 727 μs, and 7
hnsecs
long: 43 ms, 208 μs, and 4
hnsecs
Checked!(long, void): 43 ms, 734 μs, and 5
hnsecs
Checked!(long, Warn): 83 ms, 868 μs, and 5
hnsecs
ulong: 43 ms, 459 μs, and 4
hnsecs
Checked!(ulong, void): 43 ms, 544 μs, and 5
hnsecs
Checked!(ulong, Warn): 84 ms, 567 μs, and 7
hnsecs
DONE
======================================
The Checked!(int, void) type is a checkedint that just "goes
through" the framework (it's a wrapper struct that doesn't
insert any checks) and to ldc's credit it gets optimized to
pretty much a built-in int.
The Checked!(int, Warn) type inserts all checks necessary to
print a warning to stderr in case anything wrong happens. We're
looking at a 2x speed reduction, which is up to par with
Thomas' library (https://code.dlang.org/packages/checkedint).
I've tried to run the corresponding test for that and ran into
a snag. It does work with dmd but not with my locally-installed
ldc. Any idea on what could be happening? Here's the trace:
$dub run checkedint:tests --build=release --verbose
--compiler=$HOME/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2
Using dub registry url 'http://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at
/var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
No package found in current working directory.
Building package checkedint:tests in
/home/andrei/.dub/packages/checkedint-0.5.3/tests/
Refreshing local packages (refresh existing: false)...
Looking for local package map at
/var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
Found dependency checkedint 0.5.3
Checking for missing dependencies.
Refreshing local packages (refresh existing: false)...
Looking for local package map at
/var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
Found dependency checkedint 0.5.3
Checking for upgrades.
Using cached upgrade results...
Generating using build
Generate target checkedint:tests (executable
/home/andrei/.dub/packages/checkedint-0.5.3/tests
checkedint_tests)
Generate target checkedint (staticLibrary
/home/andrei/.dub/packages/checkedint-0.5.3 checkedint)
Performing "release" build using
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 for
x86_64.
Target
'/home/andrei/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a' doesn't exist, need rebuild.
checkedint 0.5.3: building configuration "library"...
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 -lib
-of.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a -release -enable-inlining -O -ignore -w -oq -od=.dub/obj -d-version=Have_checkedint -I.dub/packages/checkedint-0.5.3/source/ .dub/packages/checkedint-0.5.3/source/checkedint/asserts.d .dub/packages/checkedint-0.5.3/source/checkedint/flags.d .dub/packages/checkedint-0.5.3/source/checkedint/noex.d .dub/packages/checkedint-0.5.3/source/checkedint/package.d .dub/packages/checkedint-0.5.3/source/checkedint/throws.d .dub/packages/checkedint-0.5.3/source/checkedint/traits.d .dub/packages/checkedint-0.5.3/source/future/bitop.d .dub/packages/checkedint-0.5.3/source/future/math.d .dub/packages/checkedint-0.5.3/source/future/traits0.d
Error: failed to create path to file:
.dub/obj/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a
No such file or directory
FAIL
.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/ checkedint staticLibrary
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 failed
with exit code 1.
Andrei
Nice progress!
About the compilation problems that you're observing, it's most
likely due to LDC issue
https://github.com/ldc-developers/ldc/issues/1819, which has been
fixed since LDC 1.1.0-beta3, though no new version of LDC have
been released since the bug was fixed. You can either build LDC
master from source, or workaround the problem by presenting LDC
as DMD via ldmd2, that is:
dub run checkedint:tests --build=release --verbose
--compiler=$HOME/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldmd2
