Jürgen Keil wrote:
A kernel profile seems to show that the kernel is busy with gzip'ing
(and busy with computing SHA1 hashes?):
# lockstat -kIW -D 20 sleep 20
Profiling interrupt: 3882 events in 20.021 seconds (194 events/sec)
Count indv cuml rcnt nsec Hottest CPU+PIL Caller
-------------------------------------------------------------------------------
1802 46% 46% 0.00 1931 cpu[0] mach_cpu_idle
517 13% 60% 0.00 6178 cpu[1] SHA1Transform
65 2% 87% 0.00 5438 cpu[1] SHA1Update
16 0% 96% 0.00 752 cpu[0] SHA1Final
The reason you are busy computing SHA1 hashes is you are using
/dev/urandom. The implementation of drv/random uses SHA1 for mixing,
actually strictly speaking it is the swrand provider that does that part.
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/crypto/io/swrand.c
--
Darren J Moffat
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