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5189055396
The test always succeeded because I forgot to set the error tolerance from my debugging value 1 back to the correct value 0.01 before commiting the test. Ref #1616
249 lines
7.0 KiB
Plaintext
249 lines
7.0 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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# On X86, the timer driver uses the PIT with a timeout of max. 54 ms. Thus,
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# the driver needs to restart the timer permanently which is a hard job with 6
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# high-priority counter-threads in the background. As a consequence, timeouts
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# take much longer than requested and the test fails. However, as the PIT
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# tends to be replaced by a better timing source, we simply skip X86 for now.
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#
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#
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assert_spec hw
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assert_spec arm
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#
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# Build
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#
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build "core init drivers/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="RAM"/>
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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="CAP"/>
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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="SIGNAL"/>
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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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<start name="timer">
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<resource name="RAM" quantum="10M"/>
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<provides><service name="Timer"/></provides>
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</start>
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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">
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<binary name="init"/>
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<resource name="RAM" quantum="10M"/>
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<resource name="CPU" quantum="10"/>
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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="RAM"/>
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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="CAP"/>
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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="SIGNAL"/>
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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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<start name="test_slow" 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="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">
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<binary name="init"/>
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<resource name="RAM" quantum="100M"/>
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<resource name="CPU" quantum="80"/>
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<config>
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<parent-provides>
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<service name="ROM"/>
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<service name="RAM"/>
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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="CAP"/>
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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="SIGNAL"/>
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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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<start name="test_midl">
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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">
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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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</config>
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}
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build_boot_image "core 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 -m 64"
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run_genode_until ".*done.*\n.*done.*\n.*done.*\n" 100
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#
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# Conclusion
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#
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proc check_counter { name opt cnt total_cnt } {
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set err 0.01
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set is [expr double($cnt) / $total_cnt ]
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set is_pc [expr double(round($is * 100000)) / 1000]
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set opt_pc [expr double(round($opt * 100000)) / 1000]
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if {[expr $is > $opt + $err || $is < $opt - $err]} {
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puts stderr "Error: $name received $is_pc % of the CPU time."
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puts stderr " Should receive $opt_pc %."
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exit -1
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}
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puts "$name: $is_pc % (optimal $opt_pc %)"
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}
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proc check_quota { name opt_sp quota_sp opt quota } {
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if {[expr $quota != $opt]} {
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puts stderr "Error: $name has CPU quota of $quota us."
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puts stderr " Should have $opt us."
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exit -1
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}
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if {[expr $quota_sp != $opt_sp]} {
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puts stderr "Error: $name has CPU quota super-period of $quota_sp us."
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puts stderr " Should have $opt_sp us."
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exit -1
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}
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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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#
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# We have to consider the rounding errors as the two translations from init to
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# core and then from core to the user are distinct.
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#
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# Slow quota (1000000 * (0x8000 * 5 / 100)) / 0x8000 = 49987
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# Slow quota (1000000 * (0x8000 * 20 / 100)) / 0x8000 = 199981
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# Slow quota (1000000 * (0x8000 * 60 / 100)) / 0x8000 = 599975
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#
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check_quota "Slow test" 1000000 $slow_quota_sp 49987 $slow_quota
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check_quota "Middle test" 1000000 $midl_quota_sp 199981 $midl_quota
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check_quota "Fast test" 1000000 $fast_quota_sp 599975 $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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# A 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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# A 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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# A 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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puts "Test succeeded"
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