La société Intel a mis à disposition fin 2013 des Intel Xeon Phi de manière à évaluer leurs performances en OpenCL. Les
Il est supposé que le système hôte est une Debian Wheezy standard, sur une architecture AMD64. Le socle présenté ici était un Intel Grizzly disposant 7120. De manière à ne pas toucher au matériel embarqué et polluer le disque dur de la machine, l'équipement démarre par PXE et monte un disque par iSCSI.
La Debian Wheezy disposait d'un noyau 3.2 version 54 (maintenant 57). Un lspsi
offrait pour ce matériel la sortie suivante :
08:00.0 Co-processor: Intel Corporation Device 225c (rev 11)
Le composant MIC n'est donc pas intégré à la liste de périphériques PCI reconnus. La commande @update-pciids@ permet de mettre cette base à jour. Un nouveau lancement de lspci | grep -i phi
offre la sortie suivante :
08:00.0 Co-processor: Intel Corporation Xeon Phi coprocessor SE10/7120 series (rev 11)
Les composants fournis par Intel sont présents sur le site Intel MPSS pour Manycore Platform Software Stack
Il n'existe que les paquets pour quelques distributions RedHat ou dérivées : récupération de la dernière version RedHat
wget http://registrationcenter.intel.com/irc_nas/3778/mpss-3.1.2-rhel-6.5.tar
La documentation MPSS User Guide est indispensable pour commencer.
apt-get install alien
apt-get install pbuilder
apt-get install kernel-package
tar xvf mpss-3.1.2-rhel-6.5.tar cd mpss-3.1.2 ls *.rpm | xargs -I '{}' alien --scripts '{}'
La liste des paquets crés est la suivante :
glibc2.12.2pkg-libmicaccesssdk0_3.1.2-2_amd64.deb glibc2.12.2pkg-libmicaccesssdk-dev_3.1.2-2_amd64.deb glibc2.12.2pkg-libmicaccesssdk-doc_3.1.2-2_amd64.deb glibc2.12.2pkg-libmicmgmt0_3.1.2-2_amd64.deb glibc2.12.2pkg-libmicmgmt-dev_3.1.2-2_amd64.deb glibc2.12.2pkg-libmicmgmt-doc_3.1.2-2_amd64.deb glibc2.12.2pkg-libodmdebug0_3.1.2-2_amd64.deb glibc2.12.2pkg-libodmdebug-dev_3.1.2-2_amd64.deb glibc2.12.2pkg-libsettings0_3.1.2-2_amd64.deb glibc2.12.2pkg-libsettings-dev_3.1.2-2_amd64.deb intel-composerxe-compat-k1om_3.1.2-2_amd64.deb libscif0_3.1.2-2_amd64.deb libscif-dev_3.1.2-2_amd64.deb libscif-doc_3.1.2-2_amd64.deb mpss-boot-files_3.1.2-2_amd64.deb mpss-coi_3.1.2-2_amd64.deb mpss-coi-dev_3.1.2-2_amd64.deb mpss-coi-doc_3.1.2-2_amd64.deb mpss-daemon_3.1.2-2_amd64.deb mpss-daemon-dev_3.1.2-2_amd64.deb mpss-eclipse-cdt-mpm_3.1.2-2_amd64.deb mpss-flash_3.1.2-2_amd64.deb mpss-license_3.1.2-2_amd64.deb mpss-metadata_3.1.2-2_amd64.deb mpss-metadata-dev_3.1.2-2_amd64.deb mpss-miccheck_3.1.2-1_amd64.deb mpss-miccheck-bin_3.1.2-1_amd64.deb mpss-micmgmt_3.1.2-2_amd64.deb mpss-micmgmt-doc_3.1.2-2_amd64.deb mpss-micmgmt-python_3.1.2-2_amd64.deb mpss-modules-2.6.32-431.el6.x86-64_3.1.2-2_amd64.deb mpss-modules-dev-2.6.32-431.el6.x86-64_3.1.2-2_amd64.deb mpss-modules-headers_3.1.2-2_amd64.deb mpss-modules-headers-dev_3.1.2-2_amd64.deb mpss-mpm_3.1.2-2_amd64.deb mpss-mpm-doc_3.1.2-2_amd64.deb mpss-myo_3.1.2-2_amd64.deb mpss-myo-dev_3.1.2-2_amd64.deb mpss-myo-doc_3.1.2-2_amd64.deb mpss-rasmm-kernel_3.1.2-2_amd64.deb mpss-sciftutorials_3.1.2-2_amd64.deb mpss-sciftutorials-doc_3.1.2-2_amd64.deb mpss-sdk-k1om_3.1.2-2_amd64.deb mpss-sysmgmt-micras_3.1.2-2_amd64.deb mpss-sysmgmt-micsmc-gui_3.1.2-2_amd64.deb mpss-sysmgmt-python_3.1.2-2_amd64.deb
Il n'est pas possible de directement créer le module MIC sans modifier le code source. En effet, les fichiers suivants doivent être modifiés pour compiler sur un noyau 3.2 Debian.
host/linvnet.c host/pm_ioctl.c micscif/micscif_debug.c micscif/micscif_rb.c vnet/micveth_dma.c
Voici les opérations nécessaires poir compiler le module associé au noyau :
mkdir mpss-modules cd mpss-modules rpm2cpio ../src/mpss-modules-3.1.2-1.el6.src.rpm | cpio -idmv tar jxf mpss-modules-3.1.2.tar.bz2 wget http://www.cbp.ens-lyon.fr/emmanuel.quemener/software/XeonPhi/PatchDebianWheezyMPSS312.patch patch -p 1 -i ./PatchDebianWheezyMPSS312.patch export INSTALL_MOD_PATH=/lib/modules/$(uname -r)/extra export MIC_CARD_ARCH=k1om make make install depmod -a
Chargement du module par la commande modprobe mic
Dans le dmesg
on obtient :
[ 5486.230236] vnet: mode: dma, buffers: 62 [ 5486.230446] mic 0000:08:00.0: setting latency timer to 64 [ 5486.230662] mic 0000:08:00.0: irq 145 for MSI/MSI-X [ 5486.230701] mic0: Transition from state ready to resetting [ 5496.148217] sched: RT throttling activated [ 5496.150412] mic_probe 8:0:0 as board #0 [ 5496.150545] mic: number of devices detected 1 [ 5497.148253] mic0: Resetting (Post Code 12) [ 5497.148272] mic0: Transition from state resetting to ready [ 5497.148320] My Phys addrs: 0x87cba60000 and scif_addr 0x8818b192c0
En tapant ip link show
on obtient :
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000 link/ether 00:1e:67:7f:e4:eb brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000 link/ether 00:1e:67:7f:e4:ec brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000 link/ether 00:1e:67:7f:e4:ed brd ff:ff:ff:ff:ff:ff 5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000 link/ether 00:1e:67:7f:e4:ee brd ff:ff:ff:ff:ff:ff 7: mic0: <BROADCAST> mtu 64512 qdisc noop state DOWN mode DEFAULT qlen 1000 link/ether 4c:79:ba:32:0f:71 brd ff:ff:ff:ff:ff:ff
Copie du paramétrage pour le module MIC chargé au démarrage
cp /root/mpss-3.1.2/mpss-modules/mic.conf /etc/modprobe.d update-initramfs -k all -u
Les paquets MPSS d'Intel ont été transformés avec alien
dans /root/mpss-3.1.2
Les paquets mpss-modules sont supprimés. Les autres installés tel que.
cd /root/mpss-3.1.2 rm *mpss-modules*deb ls *-lib*deb | xargs -I '{}' dpkg -i '{}' ls *deb | grep -v '\-lib' | xargs -I '{}' dpkg -i '{}'
Par défaut les installations se font dans :
/opt/mpss/3.1.2 /opt/intel/mic/ /etc/mpss /usr/lib64
Ceci n'est plus le cas dans la Debian Wheezy. Il est donc nécessaire de rajouter (salement) un chemin allant chercher les librairies dans /usr/lib64
.
Installation d'un LD_LIBRARY_PATH
sur /usr/lib64
:
echo /usr/lib64 >> /etc/ld.so.conf.d/mic.conf
La commande mpssinfo
MPSS : mpssinfo MpssInfo Utility Log Created Thu Feb 13 15:52:59 2014 System Info HOST OS : Linux OS Version : 3.2.0-4-amd64 Driver Version : 3.1.2-1 MPSS Version : NotAvailable Host Physical Memory : 66010 MB Device No: 0, Device Name: mic0 Board Vendor ID : 0x8086 Device ID : 0x225c Subsystem ID : 0x2500 Coprocessor Stepping ID : 3 PCIe Width : x16 PCIe Speed : 5 GT/s PCIe Max payload size : 256 bytes PCIe Max read req size : 4096 bytes Coprocessor Model : 0x01 Coprocessor Model Ext : 0x00 Coprocessor Type : 0x00 Coprocessor Family : 0x0b Coprocessor Family Ext : 0x00 Coprocessor Stepping : B1 Board SKU : B1PRQ-7110 P/X MICCTRL : micctrl --status mic0: ready
Pour démarrer le système sur le Xeon Phi, le démon mpssd
s'attend à trouver un /var/lock/subsys
pour créer un /var/lock/subsys/mpssd
. Voici une solution pour que, à chaque démarrage, l'opération soit réalisée :
mkdir /var/lock/subsys sed -i "s/^exit/mkdir\ \/var\/lock\/subsys\nexit/g" /etc/rc.local
Lancement avec la commande suivante : micctrl \-\-initdefaults
dont la sortie est la suivante
[Warning] mic0: Generating compat network config file. This will be removed in the 3.2 release [Warning] mic0: User 'root' does not have either rsa or dsa keys created micctrl --config mic0: ============================================================= Linux Kernel: /usr/share/mpss/boot/bzImage-knightscorner BootOnStart: Enabled Shutdowntimeout: 300 seconds ExtraCommandLine: highres=off PowerManagment cpufreq_on;corec6_on;pc3_on;pc6_on UserAuthentication: Local Root Device: Dynamic Ram Filesystem /var/mpss/mic0.image.gz from: Base: /usr/share/mpss/boot/initramfs-knightscorner.cpio.gz CommonDir: /var/mpss/common.filelist MicDir: /var/mpss/mic0.filelist Network: Static Pair Hostname: grizzly-mic0 MIC IP: 172.31.1.1 Host IP: 172.31.1.254 Net Bits: 24 NetMask: 255.255.255.0 MtuSize: 64512 MIC MAC: 4c:79:ba:32:0f:70 Host MAC: 4c:79:ba:32:0f:71 Console: hvc0 VerboseLogging: Disabled
Lancement du démon avec mpssd
Connaissance de d'état de la carte avec micctrl –status
mic0: online (mode: linux image: /usr/share/mpss/boot/bzImage-knightscorner)
Définition de l'adresse statique de l'interface mic0 dans /etc/network/interfaces
auto mic0 iface mic0 inet static address 172.31.1.254 netmask 255.255.255.0 broadcast 172.31.1.255 network 172.31.1.0 post-up /sbin/iptables -t nat -A POSTROUTING -s 172.31.1.0/24 -o eth0 -j MASQUERADE
echo mic >> /etc/modules update-initramfs -k all -u
Chargement de l'interface réseau avec ifup mic0
Connexion sur le xeon-phi avec ssh 172.31.1.1
Vérification du nombre de processeurs avec cat /proc/cpuinfo | grep ^processor | wc -l
lequel donne 244
.
apt-get install amd-clinfo amd-libopencl1 amd-opencl-icd
Number of platforms: 1 Platform Profile: FULL_PROFILE Platform Version: OpenCL 1.2 AMD-APP (938.2) Platform Name: AMD Accelerated Parallel Processing Platform Vendor: Advanced Micro Devices, Inc. Platform Extensions: cl_khr_icd cl_amd_event_callback cl_amd_offline_devices Platform Name: AMD Accelerated Parallel Processing Number of devices: 1 Device Type: CL_DEVICE_TYPE_CPU Device ID: 4098 Board name: Max compute units: 32 Max work items dimensions: 3 Max work items[0]: 1024 Max work items[1]: 1024 Max work items[2]: 1024 Max work group size: 1024 Preferred vector width char: 16 Preferred vector width short: 8 Preferred vector width int: 4 Preferred vector width long: 2 Preferred vector width float: 4 Preferred vector width double: 0 Native vector width char: 16 Native vector width short: 8 Native vector width int: 4 Native vector width long: 2 Native vector width float: 4 Native vector width double: 0 Max clock frequency: 1200Mhz Address bits: 64 Max memory allocation: 16898804736 Image support: Yes Max number of images read arguments: 128 Max number of images write arguments: 8 Max image 2D width: 8192 Max image 2D height: 8192 Max image 3D width: 2048 Max image 3D height: 2048 Max image 3D depth: 2048 Max samplers within kernel: 16 Max size of kernel argument: 4096 Alignment (bits) of base address: 1024 Minimum alignment (bytes) for any datatype: 128 Single precision floating point capability Denorms: Yes Quiet NaNs: Yes Round to nearest even: Yes Round to zero: Yes Round to +ve and infinity: Yes IEEE754-2008 fused multiply-add: Yes Cache type: Read/Write Cache line size: 64 Cache size: 32768 Global memory size: 67595218944 Constant buffer size: 65536 Max number of constant args: 8 Local memory type: Global Local memory size: 32768 Kernel Preferred work group size multiple: 1 Error correction support: 0 Unified memory for Host and Device: 1 Profiling timer resolution: 1 Device endianess: Little Available: Yes Compiler available: Yes Execution capabilities: Execute OpenCL kernels: Yes Execute native function: Yes Queue properties: Out-of-Order: No Profiling : Yes Platform ID: 0x7f926ed1bce0 Name: Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz Vendor: GenuineIntel Device OpenCL C version: OpenCL C 1.2 Driver version: 2.0 (sse2,avx) Profile: FULL_PROFILE Version: OpenCL 1.2 AMD-APP (938.2) Extensions: cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_popcnt
Seuls les processeurs CPU sont détectés
python-pyopencl python-pyopencl-doc
python /usr/share/doc/python-pyopencl-doc/examples/benchmark-all.py
('Execution time of test without OpenCL: ', 7.673499822616577, 's') =============================================================== ('Platform name:', 'AMD Accelerated Parallel Processing') ('Platform profile:', 'FULL_PROFILE') ('Platform vendor:', 'Advanced Micro Devices, Inc.') ('Platform version:', 'OpenCL 1.2 AMD-APP (938.2)') --------------------------------------------------------------- ('Device name:', 'Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz') ('Device type:', 'CPU') ('Device memory: ', 64463, 'MB') ('Device max clock speed:', 1200, 'MHz') ('Device compute units:', 32) Execution time of test: 0.00112901 s Results OK root@grizzly:~# ^C root@grizzly:~# python /usr/share/doc/python-pyopencl-doc/examples/benchmark-all.py ('Execution time of test without OpenCL: ', 7.43899393081665, 's') =============================================================== ('Platform name:', 'AMD Accelerated Parallel Processing') ('Platform profile:', 'FULL_PROFILE') ('Platform vendor:', 'Advanced Micro Devices, Inc.') ('Platform version:', 'OpenCL 1.2 AMD-APP (938.2)') --------------------------------------------------------------- ('Device name:', 'Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz') ('Device type:', 'CPU') ('Device memory: ', 64463, 'MB') ('Device max clock speed:', 1200, 'MHz') ('Device compute units:', 32) Execution time of test: 0.000632971 s Results OK
Intel publie ses versions de OpenCL.
La dernière version est la 3.2.1.16712
cd /root wget http://registrationcenter.intel.com/irc_nas/3809/intel_sdk_for_ocl_applications_xe_2013_r3_sdk_3.2.1.16712_x64.tgz tar xzf intel_sdk_for_ocl_applications_xe_2013_r3_sdk_3.2.1.16712_x64.tgz cd /root/intel_sdk_for_ocl_applications_xe_2013_r3_sdk_3.2.1.16712_x64
ls *.rpm | xargs -I '{}' alien --scripts '{}'
opencl-1.2-base_3.2.1.16712-2_amd64.deb generated opencl-1.2-devel_3.2.1.16712-2_amd64.deb generated opencl-1.2-intel-cpu_3.2.1.16712-2_amd64.deb generated opencl-1.2-intel-devel_3.2.1.16712-2_amd64.deb generated
dpkg -i *.deb
Un lien est réalisé entre /opt/intel/opencl-1.2-3.2.1.16712
et '/etc/alternatives/opencl-intel-runtime'
echo /etc/alternatives/opencl-intel-runtime/lib64 >> /etc/ld.so.conf.d/mic.conf echo /etc/alternatives/opencl-intel-runtime/libmic >> /etc/ld.so.conf.d/mic.conf ldconfig clinfo | grep "Device Type"
Plus besoin d'établir les liens pour l'ICD.
3 composants sont détectés :
Device Type: CL_DEVICE_TYPE_CPU Device Type: CL_DEVICE_TYPE_CPU Device Type: CL_DEVICE_TYPE_ACCRLERATOR
Lancement du test Python OpenCL 'python /usr/share/doc/python-pyopencl-doc/examples/benchmark-all.py' :
('Execution time of test without OpenCL: ', 7.768199920654297, 's') =============================================================== ('Platform name:', 'AMD Accelerated Parallel Processing') ('Platform profile:', 'FULL_PROFILE') ('Platform vendor:', 'Advanced Micro Devices, Inc.') ('Platform version:', 'OpenCL 1.2 AMD-APP (938.2)') --------------------------------------------------------------- ('Device name:', 'Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz') ('Device type:', 'CPU') ('Device memory: ', 64463, 'MB') ('Device max clock speed:', 1200, 'MHz') ('Device compute units:', 32) Execution time of test: 0.000990689 s Results OK =============================================================== ('Platform name:', 'Intel(R) OpenCL') ('Platform profile:', 'FULL_PROFILE') ('Platform vendor:', 'Intel(R) Corporation') ('Platform version:', 'OpenCL 1.2 LINUX') --------------------------------------------------------------- ('Device name:', ' Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz') ('Device type:', 'CPU') ('Device memory: ', 64463, 'MB') ('Device max clock speed:', 2700, 'MHz') ('Device compute units:', 32) /usr/lib/python2.7/dist-packages/pyopencl/__init__.py:36: CompilerWarning: Non-empty compiler output encountered. Set the environment variable PYOPENCL_COMPILER_OUTPUT=1 to see more. "to see more.", CompilerWarning) Execution time of test: 0.00065297 s Results OK =============================================================== ('Platform name:', 'Intel(R) OpenCL') ('Platform profile:', 'FULL_PROFILE') ('Platform vendor:', 'Intel(R) Corporation') ('Platform version:', 'OpenCL 1.2 LINUX') --------------------------------------------------------------- ('Device name:', 'Intel(R) Many Integrated Core Acceleration Card') ('Device type:', 'ACCELERATOR') ('Device memory: ', 5772, 'MB') ('Device max clock speed:', 1100, 'MHz') ('Device compute units:', 240) Execution time of test: 0.00400693 s Results OK