Hi Alexey,
Alexey Starikovskiy wrote:
I think the least troubling place to add cond_resched() is then ACPICA
is exiting interpreter.
Please check if the attached patch helps with latencies.
There was no real change (latency was still bad). If you look at the
trace (before your patch) on
http://sucs.org/~sits/test/eeepc-debug/20080923/latency_trace.gz
(700kbyte compressed, 15Mbytes uncompressed) you can see that
acpi_ex_exit_interpreter is only called once near the end of the trace:
cat-5901 0.N.. 270496us : acpi_ex_exit_interpreter
(acpi_ev_address_space_dispatch)
By then the time had already been racked up...
--
Sitsofe | http://sucs.org/~sits/
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