[Xen-users] Question about tmem statistics

[Jinchun Kim <cienlux@xxxxxxxxx>]

Hi, All.

I am trying to get tmem statistics from xentop command.

I checked both the host and guest machine enabled tmem features.

From the host machine

root@host-machine:~# xm dmesg | grep tmem

(XEN) tmem: all pools frozen for all domains

(XEN) tmem: all pools thawed for all domains

(XEN) tmem: initializing tmem capability for domid=1...ok

(XEN) tmem: allocating ephemeral-private tmem pool for domid=1...pool_id=0

(XEN) tmem: allocating persistent-private tmem pool for domid=1...pool_id=1

(XEN) tmem: allocating ephemeral-private tmem pool for domid=1...pool_id=2

From the guest machine

root@guest-machine:~# dmesg | grep Trans

[    2.795495] frontswap enabled, RAM provided by Xen Transcendent Memory

[    2.795499] clancache enabled, RAM provided by Xen Transcendent Memory

Also, I confirmed that the guest VM dynamically increases and decreases its allocated memory

as the memory intensive benchmark runs in the guest VM.

I should be able to check the tmem statistics from xentop + tkey.

However, it does not show any tmem related statistics ...

Other options in xentop work fine. (ex: Network, vBds, and VCPUs)

"xm tmem-list --long --all" always returns "-1" and 

"xm tmem-list --long --all | /usr/sbin/xen-tmem-list-parse" seems not working because the host Os complains that

there is no such file /usr/sbin/xen-tmem-list-parse ...

Any idea to solve this problem?

Thanks.

Jinchun Kim

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