Sorry for the delay. I was busy graduating and didn't have much time in the past two weeks for testing.
The gpu hang is still there and I haven't been able to make a c version of the test program. However, I have found another problem with the newly merged opencl1.2 APIs when testing sth else. The c test program to trigger the issue is here[1]. When running on my Haswell CPU, beignet hangs in clWaitForEvents with the backtrace #0 0x00007ffff78cc9d0 in __nanosleep_nocancel () from /usr/lib/libc.so.6 #1 0x00007ffff78f6c94 in usleep () from /usr/lib/libc.so.6 #2 0x00007ffff73dfc8a in clWaitForEvents (num_events=1, event_list=0x7fffffffda58) at /home/yuyichao/projects/mlinux/pkg/all/beignet-git/src/beignet/src/cl_api.c:1316 #3 0x00007ffff7bc861e in clWaitForEvents (num_events=1, event_list=0x7fffffffda58) at ocl_icd_loader.c:873 #4 0x00000000004009aa in main () at beignet-bug2.c:34 It seems that the problem only happens for the event returned by clEnqueueBarrierWithWaitList when the wait list is not empty. I hope I am not using the api in the wrong way but I don't have another working opencl 1.2 implementation (pocl crashes on clEnqueueBarrier*...) to test it......... [1] https://gist.github.com/yuyichao/8b661d51c81f1c85466e On Wed, Jun 4, 2014 at 7:29 AM, Yichao Yu <[email protected]> wrote: > On Tue, Jun 3, 2014 at 11:15 PM, Yang, Rong R <[email protected]> wrote: >> Printf is not a built in function OpenCL 1.1, so beignet don't support it >> now. However, beignet are supporting it, maybe you could use it soon. >> > > However, even if the function is not defined, shouldn't the compiler > return a error (opencl error) rather than raising a exception and > abort? > >> Yes, the patch about 3D pipe have not push now, but You can apply by manual >> and try it. > > I'm afraid I don't have time to test it soon... > >> >> -----Original Message----- >> From: Yichao Yu [mailto:[email protected]] >> Sent: Thursday, May 29, 2014 8:40 PM >> To: Yang, Rong R >> Cc: [email protected] >> Subject: Re: [Beignet] Beignet not working on Dell Precision M3800 >> >> On Thu, May 29, 2014 at 4:46 AM, Yang, Rong R <[email protected]> wrote: >>> I have checked this issue, it is a beignet compiler bug, should be fix by >>> patch "GBE: Change 64bit integer storage in register". >>> >>> For the first problem, I have sent some patch, can you try them? The patch >>> " HSW: Restore L3 control register to disable SLM mode." fix a 3D pipe >>> affect by Beignet bug. May be the same problem you met. >> >> I am testing using the current master >> >> c34eba71bd5a518906d6d5d3ba26e44327cab251 >> GBE: fix one illegal instruction when replace a uniform dst. >> >> So the patch u mentioned for 3D pipe doesn't seem to be included yet. >> >> Here are what I saw, >> 1, `printf("%d\n", i);` works on pocl but still crashes the compiler on >> beignet with the same error. >> 2, the c example I gave works but the original python version does not... >> Will figure out the difference once I get more time. >> 3, the interference with opengl seems to be different. The same effect I >> mentioned last time shows up when sth is running on the GPU but recovers >> afterward. However, it now gives your email a funny texture by replacing >> some of the characters with another one...[1] (o in this >> case...) I also remember seeing this problem randomly sometime before but it >> was not as reproducible... >> >> I guess I will test again once those 3d pipe fixing patches are applied. >> >> [1] http://wstaw.org/m/2014/05/29/plasma-desktopzSP722.png >> >> Yichao Yu >> >>> -----Original Message----- >>> From: Yichao Yu [mailto:[email protected]] >>> Sent: Wednesday, May 28, 2014 11:49 PM >>> To: Yang, Rong R >>> Cc: [email protected] >>> Subject: Re: [Beignet] Beignet not working on Dell Precision M3800 >>> >>> On Wed, May 28, 2014 at 11:45 AM, Yichao Yu <[email protected]> wrote: >>>> On Wed, May 28, 2014 at 10:39 AM, Yichao Yu <[email protected]> wrote: >>>>>> The second problem is that there seems to be sth wrong if I run two >>>>>> tests in series. More specifically, `test_elwise_kernel`[3], >>>>>> `test_elwise_kernel_with_option`[4] and >>>>>> `test_ranged_elwise_kernel`[5] can all pass if I run them >>>>>> individually. However, if I run them together, only the first one >>>>>> can pass... I will try to reproduce this in C... >>>>> >>>>> Sorry this is NOT what happened... I was not using the right >>>>> parameter to select the tests and there isn't any (at least no >>>>> evidence for it) interference between kernels. >>>>> The problem is rather the test_elsize_kernel_with_option and >>>>> test_ranged_elwise_kernel are not working.. >>>>> Also the failing one sometimes (~2 times in 8) hang the wm for ~10s... >>>>> will try to make a c version.... >>>>> >>>> >>>> And it seems that none of them is actually working, just that when >>>> the difference is calculated using OpenCL, it always returns 0... >>>> >>>> so here[1] is the c version. The problem seems to be related to the >>>> use of get_local_size and/or get_group_id in the kernel. When I was >>>> using a simple kernel with `int i = get_global_id(0);`, everything >>>> works fine. >>> >>> I haven't applied the patch for using local memory in the kernel. Does that >>> patch affect not only local memory but also local size somehow? >>> >>>> >>>> [1] https://gist.github.com/yuyichao/242fd2a812088930af91 >>>> >>>> P.S. I was trying to use printf in the kernel and it seems to crash >>>> the compiler..... Not sure if I was using it correctly but I guess it >>>> shouldn't crash in any case... >>>> >>>> here is the error: >>>> ``` >>>> ASSERTION FAILED: it != instrinsicMap.map.end() at file >>>> /home/yuyichao/projects/mlinux/pkg/all/beignet-git/src/beignet/backen >>>> d /src/llvm/llvm_gen_backend.cpp, function void >>>> gbe::GenWriter::regAllocateCallInst(llvm::CallInst&), >>>> line 2115 [1] 28951 trace trap (core dumped) ./beignet-bug >>>> ``` >>>> >>>> with the following kernel (not sure if it is valid haven't use printf >>>> before....), >>>> >>>> ``` >>>> __kernel void fill_one(__global float *out, long n) { >>>> int i = get_global_id(0); >>>> printf("%d\n", i); >>>> if (i < n) { >>>> out[i] = 1; >>>> } >>>> } >>>> ``` >>>> (this kernel (without printf) works btw....) >>>> >>>> Yichao Yu >>>> >>>>>> >>>>>> [1] http://wstaw.org/m/2014/05/28/plasma-desktopObn722.png >>>>>> [2] http://wstaw.org/m/2014/05/28/plasma-desktopWbB722.png >>>>>> [3] >>>>>> https://github.com/pyopencl/pyopencl/blob/master/test/test_algorith >>>>>> m >>>>>> .py#L45 [4] >>>>>> https://github.com/pyopencl/pyopencl/blob/master/test/test_algorith >>>>>> m >>>>>> .py#L66 [5] >>>>>> https://github.com/pyopencl/pyopencl/blob/master/test/test_algorith >>>>>> m >>>>>> .py#L97 >>>>>>> >>>>>> >>>>>> Yours, >>>>>> Yichao Yu >>>>>> >>>>>>> >>>>>>>>>>>>Thanks for point out it, I have sent a patch to correct it. >>>>>>> >>>>>> >>>>>> Seems fixed. THX. =) _______________________________________________ Beignet mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/beignet
