Like yesterday's change to run CPU-parent child tasks serially in thread, this
reduces peak memory usage by improving the temporaly locality of the bitmaps we
create.
E.g. Let's say we start with tasks A B C and D
Queue: [ A B C D ]
Running A creates A' and A", which depend on a bitmap created by A.
Queue: [ B C D A' A" * ]
That bitmap now needs sit around in RAM while B C and D run pointlessly and can
only be destroyed at *. If instead we do this and push dependent child tasks
to the front of the queue, the queue and bitmap lifetime looks like this:
Queue: [ A' A" * B C D ]
This is much, much worse in practice because the queue is often several thousand
tasks long. 100s of megs of bitmaps can pile up for 10s of seconds pointlessly.
To make this work we add addNext() to SkThreadPool and its cousin DMTaskRunner.
I also took the opportunity to swap head and tail in the threadpool
implementation so it matches the comments and intuition better: we always pop
the head, add() puts it at the tail, addNext() at the head.
Before
Debug: 49s, 1403352k peak
Release: 16s, 2064008k peak
After
Debug: 49s, 1234788k peak
Release: 15s, 1903424k peak
BUG=skia:2478
R=bsalomon@google.com, borenet@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/263803003
git-svn-id: http://skia.googlecode.com/svn/trunk@14506 2bbb7eff-a529-9590-31e7-b0007b416f81
These tasks tend to do similar things with similar sized bitmaps, so running
them serially means we tend to hold 2x bitmaps at a time (golden and
comparison) instead of (1+k)x bitmaps (golden and k concurrent comparisons).
We still migrate GPU task's children over to the main CPU thread pool,
because they'll run faster there and free up capacity on the GPU thread.
Before
Debug: 54s, 2.9G peak
Release: 13s, 2.4G peak
After
Debug: 48s, 1.5G peak
Release: 15s, 2.0G peak
BUG=skia:2478
R=borenet@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/261593008
git-svn-id: http://skia.googlecode.com/svn/trunk@14486 2bbb7eff-a529-9590-31e7-b0007b416f81
Before this change, when limited to 4G, pathops threaded tests were the weak
link RAM-consumption-wise (in thread-local font caches) up until about 12
cores, where other problems begin to pile up too.
Tested by running:
ulimit -Sv 4194304
out/Debug/dm --threads N [--pathOpsSingleThread]
After this, we're _probably_ good to go on 32-bit machines with 8 cores.
BUG=skia:2478
R=borenet@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/265593003
git-svn-id: http://skia.googlecode.com/svn/trunk@14463 2bbb7eff-a529-9590-31e7-b0007b416f81
- Rename TileGrid -> Quilt to avoid the name overload.
- Tag all failing GMs with kSkipTiled_Flag.
You may be wondering, do any GMs pass? Yes, some do! And that trends towards all of them as we increase --quiltTile.
Two GMs only fail in --quilt mode in 565. Otherwise all GMs which fail are skipped, and those which don't fail aren't. (The 8888 variants of those two GMs are skipped even though they pass.)
BUG=skia:2477
R=reed@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/256373002
git-svn-id: http://skia.googlecode.com/svn/trunk@14457 2bbb7eff-a529-9590-31e7-b0007b416f81
This CL sets the stage for retracting the SkPicture::kOptimizeForClippedPlayback_RecordingFlag flag
from the public API (more work needs to be done in Blink & Chrome). In the new world the only way
to set this flag (and thus instantiate an SkPicture-derived
class) is by passing a factory to the SkPictureRecorder class. This is to get all clients always using
factories so that we can then change the factory call used (i.e., so the factory just creates a BBH) and
do away with the SkPicture-derived classes.
BUG=skia:2315
R=reed@google.com
Author: robertphillips@google.com
Review URL: https://codereview.chromium.org/239703006
git-svn-id: http://skia.googlecode.com/svn/trunk@14221 2bbb7eff-a529-9590-31e7-b0007b416f81
Record performance as measured by bench_record (out/Release/bench_record --skr) improves by at least 1.9x, at most 6.7x, arithmetic mean 2.6x, geometric mean 3.0x. So, good.
Correctness as measured by DM (out/Debug/dm --skr) is ~ok. One GM (shadertext2) fails because we're assuming all paint effects are immutable, but SkShaders are still mutable.
To do after this CL:
- measure playback speed
- catch up feature-wise to SkPicture
- match today's playback speed
BUG=skia:
R=robertphillips@google.com, bsalomon@google.com, reed@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/206313003
git-svn-id: http://skia.googlecode.com/svn/trunk@14010 2bbb7eff-a529-9590-31e7-b0007b416f81
DM will now read and write a custom image format, which begins first with a
normal PNG, but also includes the bitmap's raw pixels. Most tools (file
browser, Preview, Chrome, Skia image decoder) will read the file as PNG. DM
skips the encoded PNG and reads the raw pixels instead.
This scheme allows perfect pixel comparisons that never go through PM -> UPM or
UPM -> PM conversions, as long as you compare on a machine with the same native
pixel format as the machine which generated the images. Since we've only ever
used this to do same-machine comparisons, that's more than good enough for now.
We could convert as needed to a standardized PM pixel format if we find we want
these files to be portable.
DM -w output now does increase to ~1.3G. If that turns out to be annoyingly
big, I'm sure I can come up with a simple pixelwise RLE instead of writing
uncompressed pixels.
BUG=skia:
R=reed@google.com, bsalomon@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/185343002
git-svn-id: http://skia.googlecode.com/svn/trunk@13638 2bbb7eff-a529-9590-31e7-b0007b416f81
The main meat of things is in SkThreadPool. We can now give SkThreadPool a
type for each thread to create and destroy on its local stack. It's TLS
without going through SkTLS.
I've split the DM tasks into CpuTasks that run on threads with no TLS, and
GpuTasks that run on threads with a thread local GrContextFactory.
The old CpuTask and GpuTask have been renamed to CpuGMTask and GpuGMTask.
Upshot: default run of out/Debug/dm goes from ~45 seconds to ~20 seconds.
BUG=skia:
R=bsalomon@google.com, mtklein@google.com, reed@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/179233005
git-svn-id: http://skia.googlecode.com/svn/trunk@13632 2bbb7eff-a529-9590-31e7-b0007b416f81
Also:
- make GrMemoryPoolBenches threadsafe
- some tweaks to various DM code
- rename GM::shortName() to getName() to match benches and tests
On my desktop, (289 GMs, 617 benches) x 4 configs, 227 tests takes 46s in Debug, 14s in Release. (Still minutes faster than running tests && bench && gm.) GPU singlethreading is definitely the limiting factor again; going to reexamine whether that's helpful to thread it again.
BUG=skia:
R=reed@google.com, bsalomon@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/178473006
git-svn-id: http://skia.googlecode.com/svn/trunk@13603 2bbb7eff-a529-9590-31e7-b0007b416f81
- refactor GYPs and a few flags
- make GPU tests grab a thread-local GrContextFactory when needed as we do in DM for GMs
- add a few more UI features to make DM more like tests
I believe this makes the program 'tests' obsolete.
It should be somewhat faster to run the two sets together than running the old binaries serially:
- serial: tests 20s (3m18s CPU), dm 21s (3m01s CPU)
- together: 27s (6m21s CPU)
Next up is to incorporate benches. I'm only planning there on a single-pass sanity check, so that won't obsolete the program 'bench' just yet.
Tested: out/Debug/tests && out/Debug/dm && echo ok
BUG=skia:
Committed: http://code.google.com/p/skia/source/detail?r=13586R=reed@google.com, bsalomon@google.com, mtklein@google.com, tfarina@chromium.org
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/178273002
git-svn-id: http://skia.googlecode.com/svn/trunk@13592 2bbb7eff-a529-9590-31e7-b0007b416f81
- refactor GYPs and a few flags
- make GPU tests grab a thread-local GrContextFactory when needed as we do in DM for GMs
- add a few more UI features to make DM more like tests
I believe this makes the program 'tests' obsolete.
It should be somewhat faster to run the two sets together than running the old binaries serially:
- serial: tests 20s (3m18s CPU), dm 21s (3m01s CPU)
- together: 27s (6m21s CPU)
Next up is to incorporate benches. I'm only planning there on a single-pass sanity check, so that won't obsolete the program 'bench' just yet.
Tested: out/Debug/tests && out/Debug/dm && echo ok
BUG=skia:
R=reed@google.com, bsalomon@google.com, mtklein@google.com, tfarina@chromium.org
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/178273002
git-svn-id: http://skia.googlecode.com/svn/trunk@13586 2bbb7eff-a529-9590-31e7-b0007b416f81
We've already decoded the PNGs themselves into unpremultiplied bitmaps with native byte order. SkColor is just not the right choice unless you get lucky.
dm -w /tmp/dm && dm -r /tmp/dm still works on Linux, and it's much closer to working on Mac:
0 tasks left, 2 failed
Failures:
matrixconvolution_gpu
colormatrix_gpu
BUG=skia:
R=reed@google.com
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/139943002
git-svn-id: http://skia.googlecode.com/svn/trunk@13101 2bbb7eff-a529-9590-31e7-b0007b416f81
PNGs store unpremultiplied colors, so we have to convert back and forth with
SkBitmap. This is lossy. GM solves this problem by stripping the alpha
channel before writing the PNG.
This flips it around, converting the GM's output to unpremultiplied as needed. This way each pixel goes from premul to unpremul once, never back.
Tested:
out/Release/dm -w /tmp/w --config 565 8888 gpu
out/Release/dm -r /tmp/w --config 565 8888 gpu
BUG=
R=bsalomon@google.com
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/122923003
git-svn-id: http://skia.googlecode.com/svn/trunk@12926 2bbb7eff-a529-9590-31e7-b0007b416f81
DM writes out its images in a hierarchy that's a little different than GM,
so this can't read GM's output. But it can read its own, written with -w.
Example usage:
$ out/Release/dm -w /tmp/baseline
$ out/Release/dm -r /tmp/baseline -w /tmp/new
(and optionally)
$ mkdir /tmp/diff; out/Release/skdiff /tmp/baseline /tmp/new /tmp/diff
GM's IndividualImageExpectationsSource and Expectations are a little too eager
about decoding and hashing the expected images, so I took the opportunity to
add DM::Expectations that mostly replaces skiagm::ExpectationsSource and
skiagm::Expectations in DM. It mainly exists to move the image decoding and
comparison off the main thread, which would otherwise be a major speed
bottleneck.
I tried to use skiagm code where possible. One notable place where I differed
is in this new feature. When -r is a directory of images, DM does no hashing.
It considerably faster to read the expected file into an SkBitmap and do a
byte-for-byte comparison than to hash the two bitmaps and check those.
The example usage above isn't quite working 100% yet. Expectations on some GMs
fail, even with no binary change. I haven't pinned down whether this is due to
- a bug in DM
- flaky GMs
- unthreadsafe GMs
- flaky image decoding
- unthreadsafe image decoding
- something else
but I intend to. Leon, Derek and I have suspected PNG decoding isn't
threadsafe, but are as yet unable to prove it.
I also seem to be able to cause malloc to fail on my laptop if I run too many
configs at once, though I never seem to be using more than ~1G of RAM. Will
track that down too.
BUG=
R=reed@google.com, bsalomon@google.com
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/108963002
git-svn-id: http://skia.googlecode.com/svn/trunk@12596 2bbb7eff-a529-9590-31e7-b0007b416f81
This is sort of the near-minimal proof-of-concept skeleton.
- It can run existing GMs.
- It supports most configs (just not PDF).
- --replay is the only "fancy" feature it currently supports
Hopefully you will be disturbed by its speed.
BUG=
R=epoger@google.com
Review URL: https://codereview.chromium.org/22839016
git-svn-id: http://skia.googlecode.com/svn/trunk@11802 2bbb7eff-a529-9590-31e7-b0007b416f81
