imx6q GPU problem

gangli — Mon, 22 Dec 2014 04:24:29 GMT

Our board is based on SabreSD(i.MX6Q), using Android JB4.3_1.1.0(Updated to 1.1.1 recently).

We use the GPU(gc2000) inside i.MX6Q to do some image processing, mostly making use of the fragement shader with glsl. Everything was okay when it started. But when the number of rows came to a certain level(maybe 200 or less), the program crashed.

After I updated Android JB4.3 from 1.1.0 to 1.1.1, some of our programs that used to crash work, while the others(with more rows) still crash.

So I wonder to know if there is limit on the number of lines of the fragement shader program?

Re: imx6q GPU problem

gangli — Mon, 22 Dec 2014 04:27:48 GMT

backtrace when program crashed,

It looks like the program crashed when libGAL.so trying to Optimize the Shader code in gcOptimizeShader.

Build fingerprint: 'Freescale/sabresd_6dq/sabresd_6dq:4.3/1.1.1-rc2/20141017:eng/dev-keys'

Revision: '405522'

pid: 6118, tid: 6131, name: Thread-201 >>> com.ljgabc.clearview <<<

signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000014

r0 0000000d r1 00000000 r2 647dc490 r3 647e59f0

r4 647dc4e0 r5 647892c8 r6 647e48c0 r7 00000000

r8 64798d00 r9 00000000 sl 00000000 fp 00000007

ip 00000006 sp 698029e0 lr 644828e9 pc 6448360a cpsr 800f0030

d0 0000000000000000 d1 0000000000000000

d2 0000000000000000 d3 0000000000000000

d4 000000003f800000 d5 3f80000000000000

d6 0000000400000000 d7 4013333333333333

d8 0000000000000000 d9 0000000000000000

d10 0000000000000000 d11 0000000000000000

d12 0000000000000000 d13 0000000000000000

d14 0000000000000000 d15 0000000000000000

d16 00000000005f79e8 d17 0000000000004008

d18 4010000000000000 d19 4241c37937e08000

d20 3fc554e7eb0eb47c d21 bf66c0c55ca9076a

d22 bfb1be5a93a83e1d d23 3f50000000000000

d24 3f62cda65e663694 d25 bf62cda764a98eab

d26 bfbaf8e8210a415c d27 4000000000000000

d28 40008df2d49d41f1 d29 3fb0f4a31edab38b

d30 3ff0000000000000 d31 3f4de16b9c24a98f

scr 80000010

backtrace:

#00 pc 0007d60a /system/lib/libGAL.so

#01 pc 0007eccf /system/lib/libGAL.so

#02 pc 0007f5ab /system/lib/libGAL.so

#03 pc 00079a27 /system/lib/libGAL.so (gcOptimizeShader+94)

#04 pc 0007587d /system/lib/libGAL.so (gcLinkShaders+84)

#05 pc 0000b9cd /system/lib/egl/libGLESv2_VIVANTE.so

#06 pc 0001712b /system/lib/egl/libGLESv2_VIVANTE.so (glLinkProgram+346)

#07 pc 00006ecb /data/app-lib/com.ljgabc.clearview-2/libclearview.so (OpenGLClearView::CreateProgram(unsigned int&)+98)

#08 pc 00007291 /data/app-lib/com.ljgabc.clearview-2/libclearview.so (OpenGLClearView::Create()+88)

#09 pc 00006a03 /data/app-lib/com.ljgabc.clearview-2/libclearview.so (Java_com_ljgabc_clearview_JNIInterface_setup+42)

#10 pc 0001dc4c /system/lib/libdvm.so (dvmPlatformInvoke+112)

#11 pc 0004decf /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+398)

#12 pc 000386c9 /system/lib/libdvm.so (dvmCheckCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+8)

#13 pc 0004f8bd /system/lib/libdvm.so (dvmResolveNativeMethod(unsigned int const*, JValue*, Method const*, Thread*)+184)

#14 pc 00027060 /system/lib/libdvm.so

#15 pc 0002b5ec /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)

#16 pc 0005ff21 /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+292)

#17 pc 0005ff4b /system/lib/libdvm.so (dvmCallMethod(Thread*, Method const*, Object*, JValue*, ...)+20)

#18 pc 00054ccb /system/lib/libdvm.so

#19 pc 0000ca78 /system/lib/libc.so (__thread_entry+72)

#20 pc 0000cbf4 /system/lib/libc.so (pthread_create+208)

Re: Re: imx6q GPU problem

igorpadykov — Mon, 22 Dec 2014 06:33:49 GMT

Hi Gang

had you applied all latest JB_4.3_1.1.1 GPU patches, as attached ?

Best regards

igor

Re: imx6q GPU problem

gangli — Mon, 22 Dec 2014 10:10:16 GMT

Hi igor,

I have already applied all atest JB_4.3_1.1.1 GPU patches。 On JB_4.3_1.1.0, my app wouldn't run at all, but on JB_4.3_1.1.1, my app sometimes run very well, about one times out of ten.

Re: imx6q GPU problem

igorpadykov — Mon, 22 Dec 2014 13:08:52 GMT

Hi Gang

had you tried to increase gpumem kernel boot parameter?

~igor

Re: imx6q GPU problem

gangli — Tue, 23 Dec 2014 02:35:23 GMT

Hi, igor,

Yes, I had tried add gpumem=256M/512M to the bootargs, but nothing happened.

Re: imx6q GPU problem

igorpadykov — Wed, 24 Dec 2014 02:58:17 GMT

Hi Gang

had you tried to increase vmalloc and work with

other parameters, such as

ldo_active=off/on, enable_wait_mode=off

~igor

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