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Can't run Geekbench 6 Arm Preview on AmpereOne 192-core system

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geerlingguy

16 Oct, 2024 04:51 PM

When I attempt to run the latest Geekbench 6 Arm Preview on a 192-core AmpereOne system, I get the following error:

ubuntu@ubuntu:~/Geekbench-6.3.0-LinuxARMPreview$ ./geekbench6
<jemalloc>: Unsupported system page size
<jemalloc>: Unsupported system page size
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted (core dumped)

The current PAGE_SIZE:

ubuntu@ubuntu:~/Geekbench-6.3.0-LinuxARMPreview$ getconf PAGE_SIZE
65536

Is it possible to run Geekbench on systems with page sizes larger than 4K? I know there's also the issue: Can't run Geekbench on systems with 16k page size which affects the default Raspberry Pi configuration too.

1. 1 Posted by Bao Nguyen on 27 Nov, 2024 05:36 PM

   

   Same problems with Nvidia GH200 Grace CPU with 64k page size

   root@tendollars-gh200:~# ./Geekbench-6.3.0-LinuxARMPreview/geekbench6
   <jemalloc>: Unsupported system page size
   <jemalloc>: Unsupported system page size
   terminate called after throwing an instance of 'std::bad_alloc'
     what():  std::bad_alloc
   Aborted (core dumped)
   root@tendollars-gh200:~# getconf PAGE_SIZE
   65536
   root@tendollars-gh200:~# cat /proc/cmdline
   BOOT_IMAGE=/boot/vmlinuz-6.8.0-1017-nvidia-64k root=UUID=d92de826-8a46-496f-9bf5-b4f0ac4bb9ea ro consoleblank=0 mpt3sas.max_queue_depth=1000 vultr ds=vultr console=ttyAMA0,115200n8 console=tty0
   root@tendollars-gh200:~#
   

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2. 2 Posted by Dave Neary on 06 May, 2025 11:08 PM

   

   Hi!

   The issue is that jemalloc is compiled by default with a hard-coded 4K system page size. To build it to support 4K, 16K, and 64K page size, you need to compile the upstream project from source to have a memory allocation granularity of 2^16 bytes - building from source, that means:
   

   ./configure --with-lg-page=16
   make
   make install
   

   Depending on the distribution, this should be the default build option in more recent versions of jemalloc, but the upstream project still has the hard-coded page size by default.

   Dave.

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