Best regards
- Eli
天涯无处不重逢
a leaf duckweed belongs to the sea, where not to meet in life
2017-03-03 10:24 GMT+08:00 Marcelo Tosatti <mtosatti@xxxxxxxxxx>:
On Mon, Feb 27, 2017 at 03:22:56PM +0800, Eli Qiao wrote:
> Add new virsh command line `nodecachestats` to expose the cache usage
> on a node.
Testing:
Setup: one guest with 3072 bytes reserved for it.
hi Marcelo
Thanks for the testing.
I improved default schemata calculating from V10, and V10 is on the top of master branch.
Test-1: start libvirt with free cache.
resctrlfs default: L3:0=fffff;1=fffff
# LD_LIBRARY_PATH=/root/git/libvirt/src/.libs/ ./virshnodegetcachestats
ret=0 nparams=10
L3.0: 13824
L3.1: 13824
Result: correct.
Test-2: start libvirt with a manual reservation in place
(sharing space with default reservation, which is a
valid scenario).
./schemata: L3:0=fffff;1=fffff
./manualres/schemata: L3:0=f;1=f
How many bytes free there are to allocate?
Mask 0xffff0 is free. Bytes = 12288.
After start libvirt daemon:
Value of resctrlfs files:
./schemata: L3:0=fffff;1=fffff
./manualres/schemata: L3:0=f;1=f
Run cmd:
# LD_LIBRARY_PATH=/root/git/libvirt/src/.libs/ /root/git/ virshnodegetcachestats
ret=0 nparams=10
L3.0: 0
L3.1: 0
./schemata: L3:0=3;1=3
./manualres/schemata: L3:0=f;1=f1
Result: incorrect.
Test-3: start libvirt with a manual reservation in place
(not sharing space with default reservation):
./schemata: L3:0=ffff0;1=ffff0
./manualres/schemata: L3:0=f;1=f
How many bytes free there are to allocate?
Mask 0xffff0 is free. Bytes = 12288.
./schemata: L3:0=ffff0;1=ffff0
./manualres/schemata: L3:0=f;1=f
# LD_LIBRARY_PATH=/root/git/libvirt/src/.libs/ /root/git/ virshnodegetcachestats
ret=0 nparams=10
L3.0: 0
L3.1: 0
So the interface is very buggy, please fix it (and execute the tests
above to make sure it is fixed).
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