Subject: Re: [vserver] Per Guest Statistics
From: Ghislain <gadnet@aqueos.com>
Date: Wed, 20 Nov 2013 10:26:44 +0100

on my side iotop is also not working in guest:

works fine in the host but:

(aqadmin)> sudo chcontext --silent --ctx 1 iotop
Could not run iotop as some of the requirements are not met:
- Linux >= 2.6.20 with
   - VM event counters (CONFIG_VM_EVENT_COUNTERS)


strace show this:

open("/proc/vmstat", O_RDONLY)          = -1 ENOENT (No such file or 
directory)
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7f89aee77000
write(1, "Could not run iotop as some of t"..., 61Could not run iotop as 
some of the requirements are not met:
) = 61
write(1, "- Linux >= 2.6.20 with\n", 23- Linux >= 2.6.20 with
) = 23
write(1, "  - VM event counters (CONFIG_VM"..., 49  - VM event counters 
(CONFIG_VM_EVENT_COUNTERS)
) = 49
close(4)                                = 0
close(3)                                = 0


so it seems "/proc/vmstat" is lacking in guest :)

hope this helps.

regards,
Ghislain.