[CentOS] Cemtos 7 : Systemd alternatives ?

[Lamar Owen]

On 07/08/2014 01:22 PM, John R Pierce wrote:
> On 7/8/2014 9:25 AM, Lamar Owen wrote:
>> Physical servers can be told to skip certain parts of their POST,
>> especially the memory test.  Memory tests are redundant with ECC.
> but, you HAVE to zero ALL of memory with ECC to initialize it.
>

True enough; but this shouldn't take five minutes on a server with 
multiple GB/s memory bandwidth.  My Dell 6950's take a full five minutes 
to POST, and that's ridiculous.  There's eight cores; each core has 
enough bandwidth to its local RAM (NUMA, of course) where it should be 
able to sustain 2GB/s zeroing without a lot of trouble; that's a rate of 
16GB/s aggregate, and my 32GB of RAM should be zeroed in 2 seconds or 
so.  Not five minutes.

It's still not as bad as our Sun Enterprise 6500 with 18GB, though, 
which takes about a minute per GB, which is also ridiculous (it's also 
NUMA, and the Sun firmware does start up each CPU to test it's own local 
RAM blocks).