280 lines
7.6 KiB
Plaintext
280 lines
7.6 KiB
Plaintext
#
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# Check platform
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#
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# HW is the only kernel that provides appliance of quota to the scheduling.
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#
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assert_spec hw
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#
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# Build
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#
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build "core init timer test/cpu_quota"
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#
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# Boot image
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#
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create_boot_directory
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install_config {
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<config prio_levels="4">
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<parent-provides>
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<service name="ROM"/>
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<service name="IRQ"/>
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<service name="IO_MEM"/>
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<service name="IO_PORT"/>
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<service name="PD"/>
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<service name="RM"/>
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<service name="CPU"/>
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<service name="LOG"/>
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</parent-provides>
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<default-route>
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<any-service><parent/><any-child/></any-service>
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</default-route>
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<default caps="100"/>
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<start name="test-sync">
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<resource name="RAM" quantum="10M"/>
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<provides><service name="Sync"/></provides>
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</start>
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<start name="init_1" priority="-1" caps="1000">
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<binary name="init"/>
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<resource name="RAM" quantum="20M"/>
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<resource name="CPU" quantum="10"/>
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<config>
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<parent-provides>
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<service name="ROM"/>
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<service name="IRQ"/>
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<service name="IO_MEM"/>
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<service name="IO_PORT"/>
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<service name="PD"/>
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<service name="RM"/>
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<service name="CPU"/>
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<service name="LOG"/>
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<service name="Timer"/>
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<service name="Sync"/>
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</parent-provides>
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<default-route>
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<any-service><parent/><any-child/></any-service>
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</default-route>
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<default caps="100"/>
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<start name="test_slow">
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<binary name="test-cpu_quota"/>
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<resource name="RAM" quantum="10M"/>
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<resource name="CPU" quantum="50"/>
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</start>
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</config>
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</start>
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<start name="init_2" priority="-2" caps="1000">
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<binary name="init"/>
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<resource name="RAM" quantum="30M"/>
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<resource name="CPU" quantum="80"/>
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<config prio_levels="2">
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<parent-provides>
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<service name="ROM"/>
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<service name="IRQ"/>
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<service name="IO_MEM"/>
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<service name="IO_PORT"/>
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<service name="PD"/>
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<service name="RM"/>
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<service name="CPU"/>
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<service name="LOG"/>
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<service name="Timer"/>
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<service name="Sync"/>
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</parent-provides>
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<default-route>
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<any-service><parent/></any-service>
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</default-route>
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<default caps="100"/>
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<start name="test_midl" priority="0">
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<binary name="test-cpu_quota"/>
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<resource name="RAM" quantum="10M"/>
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<resource name="CPU" quantum="25"/>
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</start>
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<start name="test_fast" priority="-1">
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<binary name="test-cpu_quota"/>
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<resource name="RAM" quantum="10M"/>
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<resource name="CPU" quantum="75"/>
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</start>
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</config>
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</start>
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<start name="timer" priority="0">
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<resource name="RAM" quantum="10M"/>
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<resource name="CPU" quantum="10"/>
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<provides><service name="Timer"/></provides>
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</start>
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</config>
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}
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build_boot_image "core ld.lib.so init timer test-cpu_quota test-sync"
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#
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# Execution
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#
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append qemu_args "-nographic "
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run_genode_until ".*done.*\n.*done.*\n.*done.*\n" 110
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#
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# Conclusion
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#
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set err_cnt 0
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proc check_counter { name opt cnt total_cnt } {
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global err_cnt
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set bad 0
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set class "Good:"
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set tol 0.01
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set is 0
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#
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# As we test on QEMU possibly paralell to other activities on the same CPU
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# we have to consider inconsistencies in timing.
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#
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if {[have_include "power_on/qemu"]} { set tol 0.03 }
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#
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# FIXME: There is no reasonable explanation by now why the test results
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# are less stable on these platforms. We have tried several things that
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# did not lead to an explanation or improvement:
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#
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# * changing the timing parameters of the scheduler
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# * switching off SMP
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# * double-checking the speed of userland and kernel timers
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#
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if {[have_spec odroid_xu]} { set tol 0.04 }
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if {[have_spec arndale]} { set tol 0.04 }
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if {[expr $total_cnt != 0]} { set is [expr double($cnt) / $total_cnt ] }
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set err [expr $is - $opt]
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set is_fmt [format {%0.3f} [expr $is * 100]]
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set opt_fmt [format {%0.3f} [expr $opt * 100]]
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set err_fmt [format {%0.3f} [expr $err * 100]]
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set tol_fmt [format {%0.3f} [expr $tol * 100]]
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if {[expr abs($err) > $tol]} {
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set class "Bad: "
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set err_cnt [expr $err_cnt + 1]
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}
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puts "$class $name received $is_fmt% CPU (goal $opt_fmt% tol $tol_fmt% err $err_fmt%)"
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}
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proc check_quota { name opt_sp quota_sp opt_pc quota } {
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global err_cnt
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set opt [expr $opt_sp * $opt_pc / 100]
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set quota_err [expr $quota - $opt]
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set quota_class "Good:"
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set sp_class "Good:"
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#
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# We tolerate rounding errors up to 0.01% of the super period as the two
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# quota translations from init to core and then from core to the user are
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# distinct.
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#
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set quota_tol [expr $opt_sp * 1 / 10000]
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if {[expr abs($quota_err) > $quota_tol]} {
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set quota_class "Bad: "
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set err_cnt [expr $err_cnt + 1]
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}
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if {[expr $quota_sp != $opt_sp]} {
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set sp_class "Bad: "
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set err_cnt [expr $err_cnt + 1]
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}
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puts "$quota_class $name has_quota $quota us (goal $opt tol $quota_tol err $quota_err us)"
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puts "$sp_class $name has super period $quota_sp us (goal $opt_sp us)"
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}
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# pre-define variables if regexp does not match
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set slow_quota ""; set midl_quota ""; set fast_quota ""
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set slow_quota_sp ""; set midl_quota_sp ""; set fast_quota_sp ""
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regexp {[0-9]+} [regexp -inline {slow. quota [0-9]+} $output] slow_quota
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regexp {[0-9]+} [regexp -inline {midl. quota [0-9]+} $output] midl_quota
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regexp {[0-9]+} [regexp -inline {fast. quota [0-9]+} $output] fast_quota
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regexp {[0-9]+} [regexp -inline {slow. quota super period [0-9]+} $output] slow_quota_sp
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regexp {[0-9]+} [regexp -inline {midl. quota super period [0-9]+} $output] midl_quota_sp
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regexp {[0-9]+} [regexp -inline {fast. quota super period [0-9]+} $output] fast_quota_sp
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set super_period_us 1000000
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check_quota "Slow test" $super_period_us $slow_quota_sp 5 $slow_quota
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check_quota "Middle test" $super_period_us $midl_quota_sp 20 $midl_quota
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check_quota "Fast test" $super_period_us $fast_quota_sp 60 $fast_quota
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regexp {[0-9]+} [regexp -inline {slow. counter A [0-9]+} $output] slow_a_cnt
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regexp {[0-9]+} [regexp -inline {midl. counter A [0-9]+} $output] midl_a_cnt
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regexp {[0-9]+} [regexp -inline {fast. counter A [0-9]+} $output] fast_a_cnt
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regexp {[0-9]+} [regexp -inline {slow. counter B [0-9]+} $output] slow_b_cnt
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regexp {[0-9]+} [regexp -inline {midl. counter B [0-9]+} $output] midl_b_cnt
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regexp {[0-9]+} [regexp -inline {fast. counter B [0-9]+} $output] fast_b_cnt
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set total_cnt [expr $fast_a_cnt + $midl_a_cnt + $slow_a_cnt + $fast_b_cnt + $midl_b_cnt + $slow_b_cnt]
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#
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# Slow 5.0 % claim + 5.0 % fill = 10 %
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# Stage 1
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# A 0.5 % claim + 2.5 % fill = 3 %
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# B 4.5 % claim + 2.5 % fill = 7 %
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# Stage 2
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# A 5.0 % claim + 5.0 % fill = 10 %
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# Total
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# A 3/4 * 3 + 1/4 * 10 = 4.75 %
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# B 3/4 * 7 + 1/4 * 0 = 5.25 %
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#
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check_counter "Slow counter A" 0.0475 $slow_a_cnt $total_cnt
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check_counter "Slow counter B" 0.0525 $slow_b_cnt $total_cnt
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#
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# Middle 20 % claim + 5.0 % fill = 25.0 %
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# Stage 1
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# A 2 % claim + 2.5 % fill = 4.5 %
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# B 18 % claim + 2.5 % fill = 20.5 %
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# Stage 2
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# A 20 % claim + 5.0 % fill = 25.0 %
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# Total
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# A 3/4 * 4.5 + 1/4 * 25 = 9.625 %
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# B 3/4 * 20.5 + 1/4 * 0 = 15.375 %
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#
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check_counter "Middle counter A" 0.09625 $midl_a_cnt $total_cnt
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check_counter "Middle counter B" 0.15375 $midl_b_cnt $total_cnt
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#
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# Fast 60 % claim + 5.0 % fill = 65.0 %
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# Stage 1
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# A 6 % claim + 2.5 % fill = 8.5 %
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# B 54 % claim + 2.5 % fill = 56.5 %
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# Stage 2
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# A 60 % claim + 5.0 % fill = 65.0 %
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# Total
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# A 3/4 * 8.5 + 1/4 * 65 = 22.625 %
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# B 3/4 * 56.5 + 1/4 * 0 = 42.375 %
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#
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check_counter "Fast counter A" 0.22625 $fast_a_cnt $total_cnt
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check_counter "Fast counter B" 0.42375 $fast_b_cnt $total_cnt
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# final conclusion and return
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if {[expr $err_cnt > 0]} {
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puts "Test failed because of $err_cnt errors"
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exit -1
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}
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puts "Test succeeded"
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