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CPU session: apply quota via relative weightings

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Physical CPU quota was previously given to a thread on construction only
by directly specifying a percentage of the quota of the according CPU
session. Now, a new thread is given a weighting that can be any value.
The physical counter-value of such a weighting depends on the weightings
of the other threads at the CPU session. Thus, the physical quota of all
threads of a CPU session must be updated when a weighting is added or
removed. This is each time the session creates or destroys a thread.

This commit also adapts the "cpu_quota" test in base-hw accordingly.

Ref #1464
This commit is contained in:
Martin Stein
2015-03-27 14:05:55 +01:00
committed by Christian Helmuth
parent 955977b516
commit c9272937e7
71 changed files with 1230 additions and 483 deletions
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161
repos/base-hw/run/cpu_quota.run
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@@ -1,161 +0,0 @@
#
# Build
#
build "core init drivers/timer test/cpu_quota"
#
# Boot image
#
create_boot_directory
install_config {
<config prio_levels="4">
<parent-provides>
<service name="ROM"/>
<service name="RAM"/>
<service name="IRQ"/>
<service name="IO_MEM"/>
<service name="CAP"/>
<service name="PD"/>
<service name="RM"/>
<service name="CPU"/>
<service name="LOG"/>
<service name="SIGNAL"/>
</parent-provides>
<default-route>
<any-service><parent/><any-child/></any-service>
</default-route>
<start name="timer">
<resource name="RAM" quantum="10M"/>
<provides><service name="Timer"/></provides>
</start>
<start name="init_1" priority="-1">
<binary name="init"/>
<resource name="RAM" quantum="10M"/>
<resource name="CPU" quantum="10"/>
<config prio_levels="2">
<parent-provides>
<service name="ROM"/>
<service name="RAM"/>
<service name="IRQ"/>
<service name="IO_MEM"/>
<service name="CAP"/>
<service name="PD"/>
<service name="RM"/>
<service name="CPU"/>
<service name="LOG"/>
<service name="SIGNAL"/>
<service name="Timer"/>
</parent-provides>
<default-route>
<any-service><parent/><any-child/></any-service>
</default-route>
<!-- should receive 10 % of the CPU time -->
<start name="test_slow" priority="-1">
<binary name="test-cpu_quota"/>
<resource name="RAM" quantum="10M"/>
<resource name="CPU" quantum="50"/>
</start>
</config>
</start>
<start name="init_2" priority="-2">
<binary name="init"/>
<resource name="RAM" quantum="100M"/>
<resource name="CPU" quantum="80"/>
<config>
<parent-provides>
<service name="ROM"/>
<service name="RAM"/>
<service name="CPU"/>
<service name="RM"/>
<service name="CAP"/>
<service name="PD"/>
<service name="LOG"/>
<service name="SIGNAL"/>
<service name="Timer"/>
</parent-provides>
<default-route>
<any-service><parent/></any-service>
</default-route>
<!-- should receive 25 % of the CPU time -->
<start name="test_middle">
<binary name="test-cpu_quota"/>
<resource name="RAM" quantum="10M"/>
<resource name="CPU" quantum="25"/>
</start>
<!-- should receive 65 % of the CPU time -->
<start name="test_fast">
<binary name="test-cpu_quota"/>
<resource name="RAM" quantum="10M"/>
<resource name="CPU" quantum="75"/>
</start>
</config>
</start>
</config>
}
build_boot_image "core init timer test-cpu_quota"
#
# Execution
#
append qemu_args "-nographic -m 64"
run_genode_until "test.*\n.*test.*\n.*test.*\n" 60
#
# Conclusion
#
set slow_opt 0.10
set middle_opt 0.25
set fast_opt 0.65
set err 0.02
regexp {[0-9]+} [regexp -inline {slow.*[0-9]+} $output] slow_cnt
regexp {[0-9]+} [regexp -inline {middle.*[0-9]+} $output] middle_cnt
regexp {[0-9]+} [regexp -inline {fast.*[0-9]+} $output] fast_cnt
set total_cnt [expr $fast_cnt + $middle_cnt + $slow_cnt]
set slow_fac [expr $slow_cnt / double($total_cnt) ]
set middle_fac [expr $middle_cnt / double($total_cnt) ]
set fast_fac [expr $fast_cnt / double($total_cnt) ]
set failed 0
if {[expr $slow_fac > $slow_opt + $err || $slow_fac < $slow_opt - $err]} {
set is_pc [expr round($slow_fac * 10000) / 100]
set opt_pc [expr round($slow_opt * 10000) / 100]
puts stderr "Error: Slow counter received $is_pc% of the CPU time."
puts stderr " Should receive $opt_pc%."
set failed 1
}
if {[expr $middle_fac > $middle_opt + $err || $middle_fac < $middle_opt - $err]} {
set is_pc [expr round($middle_fac * 10000) / 100]
set opt_pc [expr round($middle_opt * 10000) / 100]
puts stderr "Error: Middle counter received $is_pc% of the CPU time."
puts stderr " Should receive $opt_pc%."
set failed 1
}
if {[expr $fast_fac > $fast_opt + $err || $fast_fac < $fast_opt - $err]} {
set is_pc [expr round($fast_fac * 10000) / 100]
set opt_pc [expr round($fast_opt * 10000) / 100]
puts stderr "Error: Fast counter received $is_pc% of the CPU time."
puts stderr " Should receive $opt_pc%."
set failed 1
}
if {$failed} {
exit -1
} else {
puts "Test succeeded"
}