Hello gerry, hello kit
I tested your fix proposal on my opteron system (before kit answered).
With this fix, the system boots,
but the lgrp framework doesn't seem to be initialized properly.
The latency stats are weird.
> lgrp_plat_node_domain::print
[
{
exists = 0x1
prox_domain = 0x2
}
{
exists = 0x1
prox_domain = 0x1
}
{
exists = 0
prox_domain = 0
}
{
exists = 0
prox_domain = 0
}
{
exists = 0
prox_domain = 0
}
{
exists = 0
prox_domain = 0
}
{
exists = 0
prox_domain = 0
}
{
exists = 0
prox_domain = 0
}
]
> lgrp_plat_cpu_node::print
[
{
exists = 0x1
node = 0x1
apicid = 0
prox_domain = 0x1
}
{
exists = 0x1
node = 0
apicid = 0x2
prox_domain = 0x2
}
{
exists = 0x1
node = 0x1
apicid = 0x1
prox_domain = 0x1
}
{
exists = 0x1
node = 0
apicid = 0x3
prox_domain = 0x2
}
{
exists = 0
node = 0
apicid = 0
prox_domain = 0
}
{
exists = 0
node = 0
apicid = 0
prox_domain = 0
}
{
exists = 0
node = 0
apicid = 0
prox_domain = 0
}
{
exists = 0
node = 0
apicid = 0
prox_domain = 0
}
{
exists = 0
node = 0
apicid = 0
> lgrp_plat_node_memory::print
[
{
start = 0x80000
end = 0xfffff
exists = 0x1
prox_domain = 0x2
}
{
start = 0
end = 0x7ffff
exists = 0x1
prox_domain = 0x1
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
{
start = 0
end = 0
exists = 0
prox_domain = 0
}
]
> lgrp_plat_lat_stats::print
{
latencies = [
[ 0x2, 0x3, 0, 0, 0, 0, 0, 0 ]
[ 0x3, 0x2, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
]
latency_max = 0x3
latency_min = 0x2
}
bash-3.2# lgrpinfo -Ta
$0
|-- 1
| CPUs: 0 2
| Memory: installed 2.0G, allocated 196M, free 1.8G
| Load: 4.58e-05
| Latency: 2
`-- 2
CPUs: 1 3
Memory: installed 1.8G, allocated 519M, free 1.3G
Load: 0.603
Latency: 2
Lgroup latencies:
---------
| 0 1 2
---------
0 | 3 3 3
1 | 3 2 3
2 | 3 3 2
---------
bash-3.2# lgrpinfo
lgroup 0 (root):
Children: 1 2
CPUs: 0-3
Memory: installed 3.8G, allocated 715M, free 3.1G
Lgroup resources: 1 2 (CPU); 1 2 (memory)
Latency: 3
lgroup 1 (leaf):
Children: none, Parent: 0
CPUs: 0 2
Memory: installed 2.0G, allocated 198M, free 1.8G
Lgroup resources: 1 (CPU); 1 (memory)
Load: 0.503
Latency: 2
lgroup 2 (leaf):
Children: none, Parent: 0
CPUs: 1 3
Memory: installed 1.8G, allocated 517M, free 1.3G
Lgroup resources: 2 (CPU); 2 (memory)
Load: 0.13
Latency: 2
The result is very different from what we get when srat is disabled (with my
patch proposal) :
bash-3.2# lgrpinfo
lgroup 0 (root):
Children: 1 2
CPUs: 0-3
Memory: installed 3.8G, allocated 1.1G, free 2.7G
Lgroup resources: 1 2 (CPU); 1 2 (memory)
Latency: 139
lgroup 1 (leaf):
Children: none, Parent: 0
CPUs: 0 2
Memory: installed 2.0G, allocated 411M, free 1.6G
Lgroup resources: 1 (CPU); 1 (memory)
Load: 0.497
Latency: 105
lgroup 2 (leaf):
Children: none, Parent: 0
CPUs: 1 3
Memory: installed 1.8G, allocated 722M, free 1.1G
Lgroup resources: 2 (CPU); 2 (memory)
Load: 0.0722
Latency: 105
bash-3.2# lgrpinfo -Ta
0
|-- 1
| CPUs: 0 2
| Memory: installed 2.0G, allocated 409M, free 1.6G
| Load: 0.0392
| Latency: 105
`-- 2
CPUs: 1 3
Memory: installed 1.8G, allocated 724M, free 1.1G
Load: 0.54
Latency: 105
Lgroup latencies:
---------------
| 0 1 2
---------------
0 | 139 139 139
1 | 139 105 139
2 | 139 139 105
---------------
Thank you
Guy
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