Julian Seward <jsew...@acm.org> writes:

  The Power7 machine is also useful for Valgrind support.  Without it it
  would be more difficult to maintain the ppc64 Valgrind port.
  
Let's really hope IBM maintains these machines for the community use
even as this Compile Farm shrinks.

We should remind IBM that we appreciate the machines, and that they
enable our porting and continued support of Free Software for their
systems.

  There are (or were, at one time) a lot of machines in the farm, but most
  of them were x86 variants, which IMO are the least valuable because that
  hardware is most widely available.  What the farm is really useful
  for is the more obscure stuff, viz, MIPS, PPC, ARM, which are harder to
  get hold of.  For sure if there were fast, solid MIPS32/64 and AArch32/64
  machines, they would be useful for Valgrind testing and development.
  
Same goes for GMP and other GNU projects I involve myself in.

I have over the last two years moved full system emulation based on qemu
for most non-x86 testing.  It is adequate, in particular for automated
regression testing where speed is less important.  I have an armv5, an
armv7, and an armv8/64 system, MIPS64 (el and eb), and some PPC systems.

There is a resilience aspect of emulation which I really appreciate;
once you have a working system image, then you can boot it on an array
of systems.  You don't rely on any piece of hardware.  (OK, you need to
keep backups of the system images, or in the worst case recreate them.)

  My impression is that it would be preferable to have fewer machines in
  the farm, but concentrate on providing at least one reliable, fast
  implementation of each of MIPS, PPC and ARM (32 and 64 bit in all
  cases).  That is, to try and emphasise quality (breadth and reliability
  of supported targets) over quantity (numbers of machines).
  
I completely agree.


Torbjörn
Please encrypt, key id 0xC8601622

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