oprofile works incorrectly under KVM guest?
If I do 'opcontrol --dump' outside the KVM guest, the output of opreport
inside the KVM guest will change.
#Guest
[...@djt_10_192 ~]# opcontrol --start; opcontrol --reset; ./a.out 1 10000;
opcontrol --dump; opreport
Profiler running.
Signalling daemon... done
crc:a4580383
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
TIMER:0|
samples| %|
------------------
13698 81.8084 no-vmlinux
2417 14.4350 libcrypto.so.0.9.8e
473 2.8249 libz.so.1.2.3
58 0.3464 a.out
42 0.2508 libc-2.5.so
34 0.2031 ld-2.5.so
14 0.0836 bash
4 0.0239 gawk
2 0.0119 oprofiled
1 0.0060 GBK.so
1 0.0060 libstdc++.so.6.0.8
#Host
[...@djt_10_48 ~]# opcontrol --dump
#Guest
[...@djt_10_192 ~]# opreport
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
TIMER:0|
samples| %|
------------------
336162 98.9203 no-vmlinux
2422 0.7127 libcrypto.so.0.9.8e
473 0.1392 libz.so.1.2.3
335 0.0986 opreport
156 0.0459 libc-2.5.so
94 0.0277 ld-2.5.so
58 0.0171 a.out
34 0.0100 bash
34 0.0100 oprofiled
33 0.0097 libstdc++.so.6.0.8
15 0.0044 gawk
6 0.0018 less
4 0.0012 GBK.so
2 5.9e-04 grep
1 2.9e-04 sed
1 2.9e-04 libm-2.5.so
1 2.9e-04 sshd
[...@djt_10_192 ~]#
Regards,
Kirby Zhou
from SOHU-RD +86-10-6272-8261
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