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Tweak JIT's loopunroll threshold on Kobo 16bpp (#4157)

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* Tweak JIT's loopunroll threshold on Kobo 16bpp
    To avoid early blacklist of the blitbuffer code on alpha-blending
    workloads.
    Least terrible workaround we could come up with to "fix" #4137

* gzip kindle/kobo/pb OTA tarballs w/ --rsyncable
    Should make them more zsync friendly.
This commit is contained in:
NiLuJe
2018-08-12 20:01:04 +02:00
committed by GitHub
parent 4b54af2b32
commit 5f4841e277
3 changed files with 17 additions and 5 deletions
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6
Makefile
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@@ -186,7 +186,7 @@ kindleupdate: all
# note that the targz file extension is intended to keep ISP from caching
# the file, see koreader#1644.
cd $(INSTALL_DIR) && \
tar -czah --no-recursion -f ../koreader-$(DIST)-$(MACHINE)-$(VERSION).targz \
tar -I"gzip --rsyncable" -cah --no-recursion -f ../koreader-$(DIST)-$(MACHINE)-$(VERSION).targz \
-T koreader/ota/package.index
koboupdate: all
@@ -215,7 +215,7 @@ koboupdate: all
koreader/ota/package.index koreader.png README_kobo.txt
# make gzip koboupdate for zsync OTA update
cd $(INSTALL_DIR) && \
tar -czah --no-recursion -f ../koreader-kobo-$(MACHINE)-$(VERSION).targz \
tar -I"gzip --rsyncable" -cah --no-recursion -f ../koreader-kobo-$(MACHINE)-$(VERSION).targz \
-T koreader/ota/package.index
pbupdate: all
@@ -252,7 +252,7 @@ pbupdate: all
applications/koreader/ota/package.index system
# make gzip pbupdate for zsync OTA update
cd $(INSTALL_DIR)/applications && \
tar -czah --no-recursion -f ../../koreader-pocketbook-$(MACHINE)-$(VERSION).targz \
tar -I"gzip --rsyncable" -cah --no-recursion -f ../../koreader-pocketbook-$(MACHINE)-$(VERSION).targz \
-T koreader/ota/package.index
utupdate: all

2
base

Submodule base updated: 08c021af2a...10d3aa4375

14
frontend/device/kobo/device.lua
View File

@@ -23,7 +23,7 @@ local Kobo = Generic:new{
model = "Kobo",
isKobo = yes,
isTouchDevice = yes, -- all of them are
hasBGRFrameBuffer = yes, -- has always been the case, even on 16bpp FWs
hasBGRFrameBuffer = yes, -- True when >16bpp
-- most Kobos have X/Y switched for the touch screen
touch_switch_xy = true,
@@ -198,6 +198,18 @@ local KoboNova = Kobo:new{
function Kobo:init()
self.screen = require("ffi/framebuffer_mxcfb"):new{device = self, debug = logger.dbg}
-- NOTE: Something about the extra work needed to handle RGB565 conversions is making the JIT optimizer crazy when doing
-- alpha-blending, causing it to very quickly blacklist the entire blitbuffer code, which basically murders performance.
-- The least terrible workaround we could come up with is tweaking the optimizer's thresholds a bit,
-- to convince it not to give up too early.
-- As this may have a detrimental effect on performance, we try to deviate from defaults as little as possible,
-- completely avoiding it if possible...
-- c.f., #4137 for the gory details.
if self.screen.fb_bpp == 16 then
logger.info("Enabling Kobo @ 16bpp tweaks")
jit.opt.start("loopunroll=45")
self.hasBGRFrameBuffer = no
end
self.powerd = require("device/kobo/powerd"):new{device = self}
self.input = require("device/input"):new{
device = self,