On 01/18/13 08:13 AM, Philip Brown wrote:
From x4100 class hardware --
root@ovm-svr3:~# time pkgrepo list -s
https://oracle-oem-oc-mgmt-sunspot:8002/IPS >/dev/null
real 0m16.664s
user 0m13.317s
sys 0m0.512s
root@ovm-svr3:~# time pkgrepo list -s
https://oracle-oem-oc-mgmt-sunspot:8002/IPS >/dev/null
real 0m13.931s
user 0m12.588s
sys 0m0.433s
From T5220 hardware --
root@its-zones6:~# time pkgrepo list -s
https://oracle-oem-oc-mgmt-sunspot:8002/IPS >/dev/null
real 0m47.065s
user 0m45.310s
sys 0m1.316s
root@its-zones6:~# time pkgrepo list -s
https://oracle-oem-oc-mgmt-sunspot:8002/IPS >/dev/null
real 0m47.921s
user 0m45.327s
sys 0m1.277s
Note that this ratio of about 4:1 performance difference is much
better than the ratio of their specint values. Oracle doesn't
publish them, but you can get an idea on T1-T3 by dividing the
specintrate by the number of threads. Note that this DOESN'T
work on T4, since those machines will do out of order issue
and use all available chip pipelines for one thread, so
single thread performance is much better than you'd estimate
using this method. For the older chips, though, this seems to
match empirical observations.
SPECINT_rate2006 of T5220 is 83.2; that benchmark used 64 threads.
SPECINT_rate2006 of DL360G5 is 73; that benchmark used 4 thread.
e.g. about 14:1 difference. In cases where no downloads are
required, I've seen pkg a factor of 10 slower on T1/T2 than
fast Intel kit.
Since python performance is pretty proportional to SPECint (per
thread rating), these machines will always be significantly slower
than Intel hardware on single threaded, non-parallel workloads.
Note that you can use parallel zone update in U1 to put more of
those slow, but plentiful threads to work at the same time.
T4 performance is much better running pkg.
- Bart
--
Bart Smaalders Solaris Core OS
[email protected] http://blogs.oracle.com/barts
"You will contribute more with Mercurial than with Thunderbird."
"Civilization advances by extending the number of important
operations which we can perform without thinking about them."
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