F1实例出现运行时错误：[XRT] ERROR: No devices found
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【以下的问题经过翻译处理】 我是 FPGA 开发的新手，在 AWS 实例上使用 Vitis 进行项目开发。主机和内核代码都是用 C/C++ 编写，它们已经在 Vitis 中成功地通过了软件和硬件仿真。
为了进行综合和仿真，我使用了一个 c4.4xlarge 实例，其中安装的是 FPGA Developer AMI - 1.8.1。在进行系统硬件构建、创建 AFI 并等待 AFI 可用后，我停止了 c4.4xlarge 实例，并将它更改为 f1.2xlarge 实例。
然后，在 f1.2xlarge 实例中，我按照链接 https://github.com/aws/aws-fpga/blob/master/Vitis/README.md 中的步骤来source vitis_runtime_setup.sh，这个脚本显示：
INFO: XRT Runtime setup Done INFO: XRT Install, non-dev INFO: Starting MPD INFO: Vitis runtime check PASSED
然后我用 $ systemctl status mpd 来检查 mpd 的状态，它显示：
● mpd.service - Xilinx Management Proxy Daemon (MPD) Loaded: loaded (/etc/systemd/system/mpd.service; disabled; vendor preset: disabled) Active: inactive (dead)
然后我通过 ./host ./binary_container_1.awsxclbin 来执行主机代码，但出现了错误：
Current working dir: /home/centos/Vitis-tutorial/aws-fpga/Vitis/tools File opened successfully! XRT build version: 2.3.0 Build hash: 9e13d57c4563e2c19bf5f518993f6e5a8dadc18a Build date: 2020-02-06 15:08:44 Git branch: 2019.2 PID: 3639 UID: 1000 [Tue Jun 30 15:24:36 2020] HOST: ip-172-31-18-64.ec2.internal EXE: /home/centos/Vitis-tutorial/aws-fpga/Vitis/tools/host [XRT] ERROR: No devices found ../src/xcl2.cpp:48 Error calling err = cl::Platform::get(&platforms), error code is: -1
目前已经使用了最新的 FPGA AMI，理论上XRT 应该是预装的，目前这个错误的原因会是什么？
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【以下的回答经过翻译处理】 需要确认下是否使用“centos”用户运行相关命令？启动mpd后，可以检查以下内容：
sudo systemctl status mpd
● mpd.service - Xilinx Management Proxy Daemon (MPD)
Loaded: loaded (/etc/systemd/system/mpd.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2020-07-07 18:21:57 UTC; 3min 11s ago
Main PID: 1891 (mpd)
CGroup: /system.slice/mpd.service
└─1891 /opt/xilinx/xrt/bin/mpd
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] read 72 bytes out of 72 bytes from fd 5, valid: 1
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: AwsDev: 0000:00:1d.0(index: 0)
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] mpd daemon: request 11 received(reqSize: 24)
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] write 2104 bytes out of 2104 bytes to fd 5
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] msg arrived on mailbox fd 5
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] retrieved msg size from mailbox: 48 bytes
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] read 80 bytes out of 80 bytes from fd 5, valid: 1
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] mpd daemon: request 10 received(reqSize: 32)
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: AwsDev: 0000:00:1d.0(index: 0)
Jul 07 18:22:10 ip-172-31-39-217.ec2.internal mpd[1891]: [0:0:1d.0] write 524360 bytes out of 524360 bytes to fd 5
然后可以用 root 用户来 source 代码
[centos@ip-172-31-39-217 aws-fpga]$ sudo -E /bin/bash
[root@ip-172-31-39-217 aws-fpga]# source vitis_runtime_setup.sh
INFO: Setting up environment variables
INFO: Changing AWS_FPGA_REPO_DIR from /home/centos/src/project_data/aws-fpga to /home/centos/aws-fpga
INFO: Sourcing sdk_setup.sh
INFO: Setting up environment variables
DEBUG: AWS_FPGA_REPO_DIR=/home/centos/aws-fpga
Entering /home/centos/aws-fpga/sdk/userspace/utils
rm -f *.o *.a ../lib/libutils.a
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../include -I/usr/include -c -o io.o io.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../include -I/usr/include -c -o log.o log.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../include -I/usr/include -c -o logger-kmsg.o logger-kmsg.c
mkdir -p ../lib
ar rcs ../lib/libutils.a io.o log.o logger-kmsg.o
Entering /home/centos/aws-fpga/sdk/userspace/fpga_libs/fpga_pci
rm -f *.o ../../lib/libfpga_pci.a
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_pci.o fpga_pci.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_pci_sysfs.o fpga_pci_sysfs.c
mkdir -p ../../lib
ar rcs ../../lib/libfpga_pci.a fpga_pci.o fpga_pci_sysfs.o
Entering /home/centos/aws-fpga/sdk/userspace/fpga_libs/fpga_dma
rm -f *.o ../../lib/libfpga_dma.a
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_dma_utils.o fpga_dma_utils.c
mkdir -p ../../lib
ar rcs ../../lib/libfpga_dma.a fpga_dma_utils.o
Entering /home/centos/aws-fpga/sdk/userspace/fpga_libs/fpga_mgmt
rm -f *.o ../../lib/libfpga_mgmt.a ../../lib/so/libfpga_mgmt.so.1.0.0
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_mgmt_cmd.o fpga_mgmt_cmd.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_mgmt.o fpga_mgmt.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -std=gnu99 -fPIC -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I. -I../../include -I/usr/include -c -o fpga_hal_mbox.o fpga_hal_mbox.c
mkdir -p ../../lib
for library in ../../lib/libfpga_pci.a ../../lib/libutils.a ../../lib/libfpga_dma.a; do ar -x $library; done
ar rcs ../../lib/libfpga_mgmt.a *.o
mkdir -p ../../lib/so
cc -o ../../lib/so/libfpga_mgmt.so.1.0.0 -shared fpga_mgmt_cmd.o fpga_mgmt.o fpga_hal_mbox.o -Wl,-soname,libfpga_mgmt.so.1 -Wl,--whole-archive ../../lib/libfpga_pci.a ../../lib/libutils.a ../../lib/libfpga_dma.a -Wl,--no-whole-archive -lrt -lpthread
ln -sf libfpga_mgmt.so.1.0.0 ../../lib/so/libfpga_mgmt.so
Entering /home/centos/aws-fpga/sdk/userspace/fpga_mgmt_tools/src
rm -f *.o *.a fpga-local-cmd static-fpga-local-cmd
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I../../include/hal -I../../include -I../. -I. -c -o fpga_local_cmd.o fpga_local_cmd.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I../../include/hal -I../../include -I../. -I. -c -o fpga_local_cmd_parse.o fpga_local_cmd_parse.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I../../include/hal -I../../include -I../. -I. -c -o virtual_jtag_pcie.o virtual_jtag_pcie.c
cc -DCONFIG_LOGLEVEL=0 -DFPGA_PCI_BARS_MAX=64 -DCLI_VERSION='"1.4.14"' -g -Wall -Werror -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I../../include/hal -I../../include -I../. -I. -c -o virtual_jtag_server.o virtual_jtag_server.c
cc -o fpga-local-cmd fpga_local_cmd.o fpga_local_cmd_parse.o virtual_jtag_pcie.o virtual_jtag_server.o -L../../lib/so -lfpga_mgmt
cc -o static-fpga-local-cmd fpga_local_cmd.o fpga_local_cmd_parse.o virtual_jtag_pcie.o virtual_jtag_server.o -L../../lib -lfpga_mgmt -lrt -lpthread
Build complete.
Executing as root...
AWS FPGA: Copying Amazon FPGA Image (AFI) Management Tools to /usr/bin
AWS FPGA: Installing shared library to /usr/local/lib64
libfpga_mgmt.so.1 (libc6,x86-64) => /usr/local/lib64/libfpga_mgmt.so.1
AWS FPGA: Installing python bindings for FPGA management library
Installed /usr/lib64/python2.7/site-packages/fpga_dma.py
Installed /usr/lib64/python2.7/site-packages/fpga_mgmt.py
Installed /usr/lib64/python2.7/site-packages/fpga_pci.py
AWS FPGA: Done with Amazon FPGA Image (AFI) Management Tools install.
Done with SDK install.
INFO: sdk_setup.sh PASSED
INFO: You are using instance with installed vivado tools. determining VIVADO version for runtime setup...
INFO: VIVADO_TOOL_VERSION is 2019.2
INFO: Installed kernel version : 3.10.0-1062.4.1.el7.x86_64
INFO: kernel version 3.10.0-1062.4.1.el7.x86_64 has been validated for this devkit.
INFO: Xilinx Vivado version is 2019.2
INFO: XRT installed. proceeding to check version compatibility
INFO: Installed XRT version : 2019.2:9e13d57c4563e2c19bf5f518993f6e5a8dadc18a
INFO: XRT version 2019.2:9e13d57c4563e2c19bf5f518993f6e5a8dadc18a is supported.
INFO: Now checking XOCL driver...
INFO: Found 'xocl Driver is installed and running. '
XILINX_XRT : /opt/xilinx/xrt
PATH : /opt/xilinx/xrt/bin:/home/centos/aws-fpga/shared/bin/scripts:/opt/Xilinx/Vitis/2019.2/bin:/opt/Xilinx/Vivado/2019.2/bin:/sbin:/bin:/usr/sbin:/usr/bin:/srv/git/centos-git-common
LD_LIBRARY_PATH : /opt/xilinx/xrt/lib:
PYTHONPATH : /opt/xilinx/xrt/python:/home/centos/aws-fpga/shared/lib:/home/centos/aws-fpga/shared/bin/scripts:/opt/Xilinx/Vitis/2019.2/bin:/opt/Xilinx/Vivado/2019.2/bin:/sbin:/bin:/usr/sbin:/usr/bin:/srv/git/centos-git-common
INFO: XRT Runtime setup Done
INFO: XRT Install, non-dev
INFO: Starting MPD
INFO: Vitis runtime check PASSED
<Run your application now>
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