AnsweredAssumed Answered

OpenCL driver freeze on Linux for clCreateCommandQueue

Question asked by pphd on Feb 9, 2016
Latest reply on Feb 14, 2016 by nibal



I try to run my OpenCL code on AMD hardware but the program freezes on boot.

Here is the following devices on the platform:


Platform Vendor:        Advanced Micro Devices, Inc.

Number of devices:      2


Device: 0

Name:                           Turks

Vendor:                         Advanced Micro Devices, Inc.

Available:                      Yes

Type:                           GPU

Compute Units:                  6

Clock Frequency:                650 mHz

Global Memory:                  512 mb

Max Allocateable Memory:        128 mb

Local Memory:                   32768 kb

Max Workgroup size:             256


Device: 1

Name:                           Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz

Vendor:                         GenuineIntel

Available:                      Yes

Type:                           CPU

Compute Units:                  4

Clock Frequency:                2604 mHz

Global Memory:                  7961 mb

Max Allocateable Memory:        2048 mb

Local Memory:                   32768 kb

Max Workgroup size:             1024



The driver is the one from Debian Jessie (Catalyst 15.9)


When I create a command queue, the function freezes indefinitely, waiting for a semaphore as shown by the following back trace after halting the program with C-C:


Program received signal SIGINT, Interrupt.

sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85

85      ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Aucun fichier ou dossier de ce type.

(gdb) bt

#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85

#1  0x00007ffff2e838a0 in ?? () from /usr/lib/x86_64-linux-gnu/

#2  0x00007ffff2e816d6 in ?? () from /usr/lib/x86_64-linux-gnu/

#3  0x00007ffff2e72993 in ?? () from /usr/lib/x86_64-linux-gnu/

#4  0x00007ffff2e44015 in clCreateCommandQueueWithProperties () from /usr/lib/x86_64-linux-gnu/

#5  0x00007ffff2e44299 in clCreateCommandQueue () from /usr/lib/x86_64-linux-gnu/


It appears when I try running the CL code on the GPU or the CPU.

Does someone have any ideas on the cause?


The program has performed the following CL functions:







    clCreateCommandQueue <== Freeze