From: Tony Whittam <tony.whittam@rapttouch.com>
To: intel-gfx@lists.freedesktop.org
Subject: (no subject)
Date: Mon, 16 Jan 2017 16:28:46 +0000 [thread overview]
Message-ID: <CAHPSuFO2bsACkHFh-oN_-430f=mL_7+25Gq=fb9RnnrbK+uRmw@mail.gmail.com> (raw)
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Hi everyone,
I don't know if this is too specialised for this list. Anyway, no harm in
asking the question :-)
*Preamble*
Build: Yocto from the Apollo Lake BSP release *gold, *
Hardware: Oxbow Hill Rev B CRB with Intel Atom E3950 and 4GB DDR3 RAM (one
SODIMM)
Build: core-image-sato-sdk
Installed on the onboard eMMC.
OpenCL: installed user space drivers from SRB4 https://software.intel.
com/file/533571/download
I'm currently evaluating the Apollo Lake platform as a candidate to run our
embedded application. We already have this application running on less
powerful ARM based Linux systems with Mali GPU using OpenCL 1.2. We're now
evaluating the E3950 as a faster alternative. To evaluate the application I
need OpenCL 1.2 or later.
To verify the OpenCL installation I have built and run the Intel demo apps:
CapsBasic and Bitonic Sort. CapsBasic sees two devices: CPU and GPU and
Bitonic sort can run its kernels correctly on both the CPU and the GPU.
*The issue*
Simply put, the application has
- thread 1 (feeder): has a loop that feeds data into OpenCL and queues
kernels
- thread 2 (consumer): waits for results and reads output data.
- an OpenCL Host command queue with out-of-order execution enabled
When I run my app and select the GPU OpenCL device, the feeder thread *stalls
inside a blocking call to clEnqueueMapBuffer(). *At this point only one
thing has been queued on the command queue: a buffer unmap command for a
different buffer. This unmap is waiting for an OpenCL event that will
indicate data ready to be processed.
In contrast, when I run my app and select the *CPU OpenCL *device, it works
perfectly.
Does anyone have any ideas on
1. what might be causing this problem running with the GPU?
2. how to debug this on the Yocto platform?
Best regards,
Tony
--
Tony Whittam
Rapt Touch
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next reply other threads:[~2017-01-16 16:28 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-16 16:28 Tony Whittam [this message]
-- strict thread matches above, loose matches on Subject: below --
2018-07-06 14:42 (no subject) Christian König
2018-07-05 10:38 rosdi ablatiff
2016-11-11 16:16 [PATCH i-g-t v5 1/4] lib: add igt_dummyload Daniel Vetter
2016-11-14 18:24 ` (no subject) Abdiel Janulgue
2015-06-12 17:09 [PATCH 2/2] drm/i915: Rework order of operations in {__intel, logical}_ring_prepare() Dave Gordon
[not found] ` <1433789441-8295-1-git-send-email-david.s.gordon@intel.com>
2015-06-12 17:09 ` [PATCH v2] Resolve issues with ringbuffer space management Dave Gordon
2015-06-12 20:25 ` (no subject) Dave Gordon
2015-06-17 11:04 ` Daniel Vetter
2015-06-17 12:41 ` Jani Nikula
2015-06-18 10:30 ` Dave Gordon
2015-04-14 10:10 Mika Kahola
2014-01-21 16:38 [PATCH] drm/i915: (VLV2) Fix the hotplug detection bits Todd Previte
2014-01-23 4:22 ` (no subject) Todd Previte
2013-12-30 2:29 Oravil Nair
2014-01-07 7:32 ` Daniel Vetter
[not found] <CAEyVMbDjLwcDFrQ7y4UtGp7HOT1wi5MB2EWLGTuOdJCKDWsUew@mail.gmail.com>
2013-04-03 15:46 ` Daniel Vetter
2012-07-19 20:00 Olivier Galibert
2012-05-31 18:00 Muhammad Jamil
2012-04-12 0:55 Rodrigo Vivi
2012-04-08 2:26 Muhammad Jamil
2012-04-05 6:44 Muhammad Jamil
2012-04-03 18:25 Muhammad Jamil
2012-04-03 12:42 Muhammad Jamil
2011-04-14 18:13 forcewake v4 (now with spinlock) Ben Widawsky
2011-04-14 18:13 ` (no subject) Ben Widawsky
2011-04-08 17:47 forcewake junk, RFC, RFT(test) Ben Widawsky
2011-04-09 20:26 ` forcewake junk, part2 Ben Widawsky
2011-04-09 20:26 ` (no subject) Ben Widawsky
2011-04-07 21:32 Jesse Barnes
2010-11-09 9:17 [PATCH] drm/i915/ringbuffer: set force wake bit before reading ring register Zou Nan hai
2010-11-09 9:17 ` Zou, Nanhai
2010-11-09 10:50 ` Chris Wilson
2010-11-10 0:36 ` Zou, Nanhai
2010-11-10 7:54 ` Chris Wilson
2010-11-10 18:47 ` Jesse Barnes
2010-11-17 22:52 ` (no subject) Thantry, Hariharan L
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