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 <[email protected] (mailto:[email protected])>: > 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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