Pre-submission Checklist
GPU Hardware
B70
DRI Devices Information
ls -ls /dev/dri/*
0 crw-rw----+ 1 root video 226, 0 Sep 14 21:52 /dev/dri/card0
0 crw-rw----+ 1 root video 226, 1 Sep 14 21:52 /dev/dri/card1
0 crw-rw----+ 1 root render 226, 128 Sep 14 21:52 /dev/dri/renderD128
0 crw-rw----+ 1 root render 226, 129 Sep 14 21:52 /dev/dri/renderD129
/dev/dri/by-path:
total 0
0 lrwxrwxrwx+1 root root 8 Sep 14 21:52 pci-0000:00:02.0-card -> ../card0
0 lrwxrwxrwx+1 root root 13 Sep 14 21:52 pci-0000:00:02.0-render -> ../renderD128
0 lrwxrwxrwx+1 root root 8 Sep 14 21:52 pci-0000:03:00.0-card -> ../card1
0 lrwxrwxrwx+1 root root 13 Sep 14 21:52 pci-0000:03:00.0-render -> ../renderD129
GPU Detailed Information (lspci output)
lspci -vvv -k -s 0000:03:00.0
03:00.0 VGA compatible controller: Intel Corporation Battlemage G31 [Arc Pro B70] (prog-if 00 [VGA controller])
Subsystem: Shenzhen Gunnir Technology Development Co., Ltd Device 2742
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin ? routed to IRQ 172
IOMMU group: 15
Region 0: Memory at 7607000000 (64-bit, prefetchable) [size=16M]
Region 2: Memory at 6000000000 (64-bit, prefetchable) [size=32G]
Expansion ROM at 60400000 [disabled] [size=2M]
Capabilities: <access denied>
Kernel driver in use: xe
Kernel modules: xe
Driver Version
26.31.39395.13
Installed GPU Driver Packages
sudo dpkg --list | grep -iE "igc|gmm|opencl|level-zero|fc|level_zero|ocloc|libze"
ii bpfcc-tools 0.35.0+ds-1ubuntu2 all tools for BPF Compiler Collection (BCC)
ii clinfo 3.0.25.02.14-1build1 amd64 Query OpenCL system information
ii elementary-xfce-icon-theme 0.22-1 all elementary icon theme modified for Xfce
ii gir1.2-libxfce4ui-2.0:amd64 4.20.2-1 amd64 Typelib file for libxfce4ui
ii gir1.2-libxfce4util-1.0:amd64 4.20.1-1build1 amd64 Typelib file for libxfce4util
ii gir1.2-xfconf-0:amd64 4.20.0-1build1 amd64 utilities for managing settings in Xfce - introspection support
ii intel-igc-core-2 2.40.13 amd64 Intel(R) Graphics Compiler for OpenCL(TM)
ii intel-igc-opencl-2 2.40.13 amd64 Intel(R) Graphics Compiler for OpenCL(TM)
ii intel-ocloc 26.31.39395.13-1~26.04~ppa1 amd64 Tool for managing Intel Compute GPU device binary format
ii intel-opencl-icd 26.31.39395.13-1~26.04~ppa1 amd64 Intel graphics compute runtime for OpenCL
ii intltool-debian 0.35.0+20060710.6build1 all Help i18n of RFC822 compliant config files
ii libbpfcc:amd64 0.35.0+ds-1ubuntu2 amd64 shared library for BPF Compiler Collection (BCC)
ii libcbor0.10:amd64 0.10.2-2ubuntu3 amd64 library for parsing and generating CBOR (RFC 7049)
ii libcgi-fast-perl 1:2.17-1 all CGI subclass for work with FCGI
ii libdebconfclient0:amd64 0.280ubuntu1 amd64 Debian Configuration Management System (C-implementation library)
ii libemail-address-xs-perl 1.05-1build5 amd64 Perl library for RFC 5322 address/group parsing and formatting
ii libexo-2-0:amd64 4.20.0-1build1 amd64 Library with extensions for Xfce (GTK-3 version)
ii libfcgi-bin 2.4.5-0.1build2 amd64 FastCGI bridge from CGI
ii libfcgi-perl 0.82+ds-3build3 amd64 helper module for FastCGI
ii libfcgi0t64:amd64 2.4.5-0.1build2 amd64 shared library of FastCGI
ii libfile-fcntllock-perl 0.22-4ubuntu6 amd64 Perl module for file locking with fcntl(2)
ii libgarcon-1-0:amd64 4.20.0-1build1 amd64 freedesktop.org compliant menu implementation for Xfce
ii libgarcon-gtk3-1-0:amd64 4.20.0-1build1 amd64 menu library for Xfce (GTK3 library)
ii libigc2 2.40.13+ds1-1~26.04 amd64 Core libraries for Intel(R) Graphics Compiler for OpenCL(TM)
ii libigdfcl2 2.40.13+ds1-1~26.04 amd64 OpenCL library for Intel(R) Graphics Compiler for OpenCL(TM)
ii libigdgmm12:amd64 22.10.1-1~26.04~ppa1 amd64 Intel Graphics Memory Management Library -- shared library
ii libmath-base85-perl 0.5+dfsg-2 all Perl extension for base 85 numbers, as referenced by RFC 1924
ii libsigc++-2.0-0v5:amd64 2.12.1-4build1 amd64 type-safe Signal Framework for C++ - runtime
ii libsigc++-3.0-0:amd64 3.6.0-2build1 amd64 type-safe Signal Framework for C++ - runtime
ii libxfce4panel-2.0-4 4.20.7-1 amd64 Xfce4 panel library (GTK3 variant)
ii libxfce4ui-2-0:amd64 4.20.2-1 amd64 widget library for Xfce - Gtk+3 variant
ii libxfce4ui-common 4.20.2-1 all common files for libxfce4ui
ii libxfce4ui-utils 4.20.2-1 amd64 Utility files for libxfce4ui
ii libxfce4util-bin 4.20.1-1build1 amd64 tools for libxfce4util
ii libxfce4util-common 4.20.1-1build1 all common files for libxfce4util
ii libxfce4util7:amd64 4.20.1-1build1 amd64 Utility functions library for Xfce4
ii libxfce4windowing-0-0:amd64 4.20.5-1 amd64 Wayland utility functions library for Xfce4
ii libxfce4windowing-common 4.20.5-1 all common files for libxfce4windowing
ii libxfconf-0-3:amd64 4.20.0-1build1 amd64 Client library for Xfce4 configure interface
ii libze-dev:amd64 1.32.0-1~26.04~ppa1 amd64 oneAPI Level Zero -- development files
ii libze-intel-gpu1 26.31.39395.13-1~26.04~ppa1 amd64 Intel oneAPI L0 support implementation for Intel GPUs -- shared library
ii libze1:amd64 1.32.0-1~26.04~ppa1 amd64 oneAPI Level Zero -- share libraries
ii linux-firmware-qlogic 20260319.git217ca6e4-0ubuntu1.1 all Firmware for QLogic SCSI, FC, and IB host bus and Ethernet adapters
ii mousepad 0.7.0-1 amd64 simple Xfce oriented text editor
ii node-punycode 2.3.1+~2.1.4-1 all Nodejs robust Punycode converter fully RFC compliant
ii node-uuid 8.3.2+~8.3.4-3 all simple and fast RFC4122 UUID generation - Node.js module
ii node-ws 8.19.0+~cs14.19.1-1 all RFC-6455 WebSocket implementation module for Node.js
ii nvidia-cuda-toolkit-doc 12.4.1-8 all NVIDIA CUDA and OpenCL documentation
ii nvidia-opencl-dev:amd64 12.4.127~12.4.1-8 amd64 NVIDIA OpenCL development files
ii nvidia-profiler 12.4.127~12.4.1-8 amd64 NVIDIA Profiler for CUDA and OpenCL
ii ocl-icd-libopencl1:amd64 2.3.4-1 amd64 Generic OpenCL ICD Loader
ii ocl-icd-opencl-dev:amd64 2.3.4-1 amd64 OpenCL development files
ii opencl-c-headers 3.0~2025.07.22-2build1 all OpenCL (Open Computing Language) C header files
ii opencl-clhpp-headers 3.0~2025.07.22-1ubuntu2 all C++ headers for OpenCL development
ii python3-bpfcc 0.35.0+ds-1ubuntu2 all Python 3 wrappers for BPF Compiler Collection (BCC)
ii python3-idna 3.11-1ubuntu0.1 all Python IDNA2008 (RFC 5891) handling (Python 3)
ii ristretto 0.13.4-1 amd64 lightweight picture-viewer for the Xfce desktop environment
ii thunar 4.20.7-1 amd64 File Manager for Xfce
ii wezterm 20240203-110809-5046fc22 amd64 Wez's Terminal Emulator.
ii xfburn 0.7.2-1build1 amd64 CD-burner application for Xfce Desktop Environment
ii xfce4-appfinder 4.20.0-2build1 amd64 Application finder for the Xfce4 desktop environment
ii xfce4-clipman 2:1.6.6-1build2 amd64 clipboard history utility
ii xfce4-clipman-plugin 2:1.6.6-1build2 amd64 clipboard history plugin for Xfce panel
ii xfce4-cpugraph-plugin:amd64 1.2.10-1build3 amd64 CPU load graph plugin for the Xfce4 panel
ii xfce4-dict 0.8.8-1build1 amd64 Dictionary plugin for Xfce4 panel
ii xfce4-helpers 4.20.1-1ubuntu2 amd64 helpers for the Xfce4 desktop environment
ii xfce4-indicator-plugin 2.4.2-1build3 amd64 plugin to display information from applications in the Xfce4 panel
ii xfce4-mailwatch-plugin 1.3.1-1build3 amd64 mail watcher plugin for the Xfce4 panel
ii xfce4-netload-plugin:amd64 1.5.0-1 amd64 network load monitor plugin for the Xfce4 panel
ii xfce4-notifyd 0.9.7-2build1 amd64 simple, visually-appealing notification daemon for Xfce
ii xfce4-panel 4.20.7-1 amd64 panel for Xfce4 desktop environment
ii xfce4-panel-profiles 1.0.15-1build1 all layout manager for the Xfce panel
ii xfce4-places-plugin:amd64 1.8.3-1build3 amd64 quick access to folders, documents and removable media
ii xfce4-power-manager 4.20.0-1build1 amd64 power manager for Xfce desktop
ii xfce4-power-manager-data 4.20.0-1build1 all power manager for Xfce desktop, arch-indep files
ii xfce4-power-manager-plugins 4.20.0-1build1 amd64 power manager plugins for Xfce panel
ii xfce4-pulseaudio-plugin:amd64 0.5.1-1 amd64 Xfce4 panel plugin to control pulseaudio
ii xfce4-screensaver 4.20.1-1build1 amd64 screen saver and locker that is integrated with the xfce4 desktop
ii xfce4-screenshooter 1.11.1-1build1 amd64 screenshots utility for Xfce
ii xfce4-session 4.20.4-1 amd64 Xfce4 Session Manager
ii xfce4-settings 4.20.1-1ubuntu2 amd64 graphical application for managing Xfce settings
ii xfce4-systemload-plugin:amd64 1:1.3.2-2ubuntu4 amd64 system load monitor plugin for the Xfce4 panel
ii xfce4-taskmanager 1.5.8-1build1 amd64 process manager for the Xfce4 Desktop Environment
ii xfce4-terminal 1.1.5-1 amd64 Xfce terminal emulator
ii xfce4-verve-plugin:amd64 2.0.3-1build3 amd64 Verve (command line) plugin for Xfce panel
ii xfce4-weather-plugin:amd64 0.12.0-1build1 amd64 weather information plugin for the Xfce4 panel
ii xfce4-whiskermenu-plugin 2.10.1-1 amd64 Alternate menu plugin for the Xfce desktop environment
ii xfce4-xkb-plugin:amd64 1:0.8.5-1build1 amd64 xkb layout switch plugin for the Xfce4 panel
ii xfconf 4.20.0-1build1 amd64 utilities for managing settings in Xfce
ii xfdesktop4 4.20.1-1ubuntu2 amd64 Xfce desktop background, icons and root menu manager
ii xfdesktop4-data 4.20.1-1ubuntu2 all Xfce desktop background, icons and root menu (common files)
ii xfwm4 4.20.0-1build1 amd64 window manager of the Xfce project
Driver Installation Details
Download deb files in https://github.com/intel/compute-runtime/releases/tag/26.31.39395.13.
sudo dpkg -i *.deb.
Linux Distribution
Other (please specify below)
Other Linux Distribution
Ubuntu 26.04
Kernel Version & Boot Parameters
uname -r
7.0.0-30-generic
cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-7.0.0-30-generic root=UUID=19454695-456c-4aaf-ae90-ed26476bc394 ro quiet splash i915.force_probe=!56a0,!4682,!e223 xe.force_probe=56a0,4682,e223
lsmod | grep -E 'i915|xe'
xe 4419584 15
drm_gpusvm_helper 57344 1 xe
gpu_sched 69632 1 xe
drm_gpuvm 57344 1 xe
drm_buddy 28672 1 xe
drm_ttm_helper 20480 1 xe
ttm 135168 2 drm_ttm_helper,xe
drm_exec 12288 2 drm_gpuvm,xe
drm_suballoc_helper 24576 1 xe
drm_display_helper 303104 1 xe
cec 106496 2 drm_display_helper,xe
i2c_algo_bit 16384 1 xe
intel_vsec 24576 3 intel_pmc_ssram_telemetry,pmt_telemetry,xe
video 77824 1 xe
Actual Behavior
sycl::malloc_device() failed when allocate memory size is more than 19.4GB, through the "Max memory allocation" is 30.3GB (clinfo) on B70.
When allocate <=19.3GB, it's successful.
Expected Behavior
sycl::malloc_device() should be successful when allocate memory size<= 30.3GB (Max memory allocation) on B70.
When allocate <=19.3GB, it's successful.
Reproduction Rate
Always reproduces - 100%
Steps to Reproduce
icpx -fsycl -o alloc_20gb alloc_20gb.cpp
./alloc_20gb 19.3
./alloc_20gb 19.4
alloc_20gb.cpp
#include <sycl/sycl.hpp>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <chrono>
#include <thread>
uint64_t get_free_intel_gpu_memory(const sycl::queue &q)
{
const sycl::device dev = q.get_device();
if (!dev.has(sycl::aspect::ext_intel_free_memory))
{
return 0;
}
try
{
return dev.get_info<sycl::ext::intel::info::device::free_memory>();
}
catch (const sycl::exception &)
{
return 0;
}
}
uint64_t get_gpu_max_memory_allocation(const sycl::queue &q)
{
const sycl::device dev = q.get_device();
try
{
return static_cast<uint64_t>(
dev.get_info<sycl::info::device::max_mem_alloc_size>());
}
catch (const sycl::exception &)
{
return 0;
}
}
int main(int argc, char *argv[])
{
try
{
float max_size_g = 19.0f;
if (argc > 1)
{
try
{
max_size_g = std::stof(argv[1]);
}
catch (const std::exception &)
{
max_size_g = 19.0f;
}
}
sycl::queue q(sycl::gpu_selector_v);
std::cout << "SYCL device: " << q.get_device().get_info<sycl::info::device::name>() << "\n\n";
std::cout << "GPU max memory allocation: "
<< std::fixed << std::setprecision(2)
<< get_gpu_max_memory_allocation(q) / (1024.0 * 1024.0 * 1024.0)
<< " GiB\n\n";
const size_t one_gib = static_cast<size_t>(max_size_g * 1024ULL * 1024ULL * 1024ULL);
std::vector<void *> allocations;
std::cout << "Starting allocations...\n\n";
for (int i = 1; i <= 1; ++i)
{
std::cout << "=== Allocation " << max_size_g << "(GiB) ===\n";
std::cout << "Free Intel GPU memory BEFORE: "
<< std::fixed << std::setprecision(2)
<< get_free_intel_gpu_memory(q) / (1024.0 * 1024.0) << " MiB\n";
void *dev_ptr = sycl::malloc_device(one_gib, q);
if (dev_ptr == nullptr)
{
std::cerr << "Failed to allocate " << max_size_g << " GiB on device!\n";
break;
}
allocations.push_back(dev_ptr);
std::cout << "Successfully allocated " << max_size_g << " GiB at: " << dev_ptr << "\n";
std::cout << "Free Intel GPU memory AFTER : "
<< std::fixed << std::setprecision(2)
<< get_free_intel_gpu_memory(q) / (1024.0 * 1024.0) << " MiB\n\n";
}
// Keep memory allocated until user presses a key or program ends
std::cout << "Memory will be released when the program ends.\n";
// Free all allocations at the end
std::cout << "Freeing all device memory...\n";
for (auto ptr : allocations)
{
sycl::free(ptr, q);
}
std::cout << "All device memory freed.\n";
}
catch (const sycl::exception &e)
{
std::cerr << "SYCL exception: " << e.what() << std::endl;
return 1;
}
return 0;
}
Is this a regression?
Last Known Working Driver Version
No response
First Known Failing Driver Version
No response
API Call Logs
19.3 GB - passed
./alloc_20gb 19.3
SYCL device: Intel(R) Arc(TM) Pro B70 Graphics
GPU max memory allocation: 30.30 GiB
Starting allocations...
=== Allocation 19.30(GiB) ===
Free Intel GPU memory BEFORE: 32586.04 MiB
Successfully allocated 19.30 GiB at: 0xffffd556b6400000
Free Intel GPU memory AFTER : 12822.70 MiB
Memory will be released when the program ends.
Freeing all device memory...
All device memory freed.
19.4GB - failed
./alloc_20gb 19.4
SYCL device: Intel(R) Arc(TM) Pro B70 Graphics
GPU max memory allocation: 30.30 GiB
Starting allocations...
=== Allocation 19.40(GiB) ===
Free Intel GPU memory BEFORE: 32586.04 MiB
Failed to allocate 19.4 GiB on device!
Memory will be released when the program ends.
Freeing all device memory...
All device memory freed.
strace Logs
No response
System Logs / dmesg Output
No response
Backtrace (if crash or hang occurred)
No response
Source Code / Reproducer
No response
Command Line / Application Details
No response
oneAPI Version (if applicable)
No response
Screenshots / Video
No response
Additional Notes
It's impact the llama.cpp SYCL backend. Refer to issue: ggml-org/llama.cpp#28778
Pre-submission Checklist
GPU Hardware
B70
DRI Devices Information
GPU Detailed Information (lspci output)
Driver Version
26.31.39395.13
Installed GPU Driver Packages
Driver Installation Details
Download deb files in https://github.com/intel/compute-runtime/releases/tag/26.31.39395.13.
sudo dpkg -i *.deb.
Linux Distribution
Other (please specify below)
Other Linux Distribution
Ubuntu 26.04
Kernel Version & Boot Parameters
Actual Behavior
sycl::malloc_device() failed when allocate memory size is more than 19.4GB, through the "Max memory allocation" is 30.3GB (clinfo) on B70.
When allocate <=19.3GB, it's successful.
Expected Behavior
sycl::malloc_device() should be successful when allocate memory size<= 30.3GB (Max memory allocation) on B70.
When allocate <=19.3GB, it's successful.
Reproduction Rate
Always reproduces - 100%
Steps to Reproduce
icpx -fsycl -o alloc_20gb alloc_20gb.cpp
./alloc_20gb 19.3
./alloc_20gb 19.4
alloc_20gb.cpp
Is this a regression?
Last Known Working Driver Version
No response
First Known Failing Driver Version
No response
API Call Logs
19.3 GB - passed
19.4GB - failed
strace Logs
No response
System Logs / dmesg Output
No response
Backtrace (if crash or hang occurred)
No response
Source Code / Reproducer
No response
Command Line / Application Details
No response
oneAPI Version (if applicable)
No response
Screenshots / Video
No response
Additional Notes
It's impact the llama.cpp SYCL backend. Refer to issue: ggml-org/llama.cpp#28778