[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681

--- Comment #27 from rainer at ultra-secure.de ---
(In reply to Roger Pau Monné from comment #25)
(freebsd11 <FlameGraph>) 0 # kldload pmc
kldload: can't load pmc: module already loaded or in kernel

(freebsd11 <FlameGraph>) 1 # kldstat 
Id Refs Address            Size     Name
 1   49 0xffffffff80200000 1fa7c38  kernel
 2    1 0xffffffff821a9000 30aec0   zfs.ko
 3   11 0xffffffff824b4000 adc0     opensolaris.ko
 4    1 0xffffffff824bf000 1620     accf_data.ko
 5    1 0xffffffff824c1000 2710     accf_http.ko
 6    1 0xffffffff824c4000 3a78     cc_htcp.ko
 7    1 0xffffffff82619000 587b     fdescfs.ko
 8    1 0xffffffff8261f000 3710     ums.ko
 9    1 0xffffffff82623000 665d     nullfs.ko
10    1 0xffffffff8262a000 adec     tmpfs.ko
11    1 0xffffffff82635000 1bb42    hwpmc.ko
12    1 0xffffffff82651000 848      dtraceall.ko
13    9 0xffffffff82652000 3d890    dtrace.ko
14    1 0xffffffff82690000 4860     dtmalloc.ko
15    1 0xffffffff82695000 5aef     dtnfscl.ko
16    1 0xffffffff8269b000 6832     fbt.ko
17    1 0xffffffff826a2000 585be    fasttrap.ko
18    1 0xffffffff826fb000 172e     sdt.ko
19    1 0xffffffff826fd000 cf3d     systrace.ko
20    1 0xffffffff8270a000 cd44     systrace_freebsd32.ko
21    1 0xffffffff82717000 535e     profile.ko

Do you have an idea what has to be done on XenServer to enable PMU?

In any case, I cannot do any configuration on Dom0. My coworker would have to
do that tomorrow (CET)


Best Regards
Rainer

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