Total amount of memory is wrong on Windows

[eschnett]

I see this output on Windows (Cygwin):

$ hwloc-ls --version
hwloc-ls 1.11.0
$ hwloc-ls
Machine (1862MB total) + NUMANode L#0 (P#0 1862MB) + Package L#0 + L2 L#0 (3072KB)
  L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0 + PU L#0 (P#0)
  L1d L#1 (32KB) + L1i L#1 (32KB) + Core L#1 + PU L#1 (P#1)

The total amount of memory available is 4 GByte, shown correctly e.g. by top or /proc/meminfo.

[bgoglin]

If I remember correctly, we couldn't find a way to retrieve the total memory from the windows API, that's why we're showing the available memory only. If you know how to fix this, please let us know.

[eschnett]

I found this source of information: http://superuser.com/questions/412808/how-do-i-detect-my-computers-ram-configuration

This outputs for me:

$ wmic MemoryChip get BankLabel, Capacity, DeviceLocator
BankLabel  Capacity    DeviceLocator  
           2147483648  XMM1           
           2147483648  XMM3           
           4194304     SYSTEM ROM     

This implies I have 4 GByte RAM and a bit of ROM, which looks correct.

[bgoglin]

It looks like wmic reports information from DMI (like dmidecode on Linux). Unfortunately we don't know how to match those output lines to NUMA nodes. Hence (if we find an API to read those from hwloc), we'd have to assume NUMA nodes are populated with same numbers of DIMMs.