Ichthyostega
c934e7f079
the `BreakingPoint` tool conducts a binary search to find the ''stress factor'' where a given schedule breaks. There are some known deviations related to the measurement setup, which unfortunately impact the interpretation of the ''stress factor'' scale. Earlier, an attempt was made, to watch those factors empirically and work a ''form factor'' into the ''effective stress factor'' used to guide this measurement method. Closer investigation with extended and elastic load patters now revealed a strong tendency of the Scheduler to scale down the work resources when not fully loaded. This may be mistaken by the above mentioned adjustments as a sign of a structural limiation of the possible concurrency. Thus, as a mitigation, those adjustments are now only performed at the beginning of the measurement series, and also only when the stress factor is high (implying that the scheduler is actually overloaded and thus has no incentive for scaling down). These observations indicate that the »Breaking Point« search must be taken with a grain of salt: Especially when the test load does ''not'' contain a high degree of inter dependencies, it will be ''stretched elastically'' rather than outright broken. And under such circumstances, this measurement actually gauges the Scheduler's ability to comply to an established load and computation goal.
182 lines
3.5 KiB
Text
182 lines
3.5 KiB
Text
digraph {
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// Nodes
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N0[label="0: 37", shape=doublecircle ]
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N1[label="1: 4F" ]
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N2[label="2: 95.2" ]
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N3[label="3: 1C" ]
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N4[label="4: 0A" ]
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N5[label="5: 03" ]
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N6[label="6: 7E.1" ]
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N7[label="7: B4.2" ]
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N8[label="8: BB.2" ]
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N9[label="9: 8F.1" ]
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N10[label="10: 8F.1" ]
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N11[label="11: 4C" ]
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N12[label="12: 4C" ]
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N13[label="13: 0F" ]
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N14[label="14: 0F" ]
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N15[label="15: 5A.1" ]
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N16[label="16: 5A.1" ]
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N17[label="17: 75.1" ]
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N18[label="18: 75.1" ]
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N19[label="19: AC.2" ]
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N20[label="20: AC.2" ]
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N21[label="21: 38" ]
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N22[label="22: 79.1" ]
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N23[label="23: FC.3" ]
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N24[label="24: 29" ]
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N25[label="25: 29" ]
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N26[label="26: 29" ]
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N27[label="27: 29" ]
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N28[label="28: 29" ]
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N29[label="29: A3.2" ]
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N30[label="30: A3.2" ]
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N31[label="31: A3.2" ]
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N32[label="32: A3.2" ]
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N33[label="33: A3.2" ]
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N34[label="34: D8.3" ]
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N35[label="35: B0.2" ]
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N36[label="36: 64.1" ]
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N37[label="37: 64.1" ]
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N38[label="38: E8.3" ]
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N39[label="39: CE.3" ]
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N40[label="40: CE.3" ]
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N41[label="41: 2B" ]
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N42[label="42: 2B" ]
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N43[label="43: 2B" ]
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N44[label="44: 2B" ]
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N45[label="45: 27" ]
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N46[label="46: 27" ]
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N47[label="47: F3.3" ]
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N48[label="48: 27" ]
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N49[label="49: 27" ]
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N50[label="50: EB.3" ]
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N51[label="51: E9.3" ]
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N52[label="52: E9.3" ]
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N53[label="53: 49" ]
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N54[label="54: 49" ]
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N55[label="55: 49" ]
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N56[label="56: 49" ]
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N57[label="57: CB.3" ]
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N58[label="58: 3A" ]
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N59[label="59: 3A" ]
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N60[label="60: 3A" ]
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N61[label="61: BC.2", shape=box, style=rounded ]
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N62[label="62: BC.2", shape=box, style=rounded ]
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N63[label="63: 4B", shape=box, style=rounded ]
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// Layers
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{ /*0*/ rank=min N0 }
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{ /*1*/ rank=same N1 }
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{ /*2*/ rank=same N2 }
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{ /*3*/ rank=same N3 }
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{ /*4*/ rank=same N4 }
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{ /*5*/ rank=same N5 }
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{ /*6*/ rank=same N6 }
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{ /*7*/ rank=same N7 }
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{ /*8*/ rank=same N8 }
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{ /*9*/ rank=same N9 N10 }
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{ /*10*/ rank=same N11 N12 }
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{ /*11*/ rank=same N13 N14 }
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{ /*12*/ rank=same N15 N16 }
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{ /*13*/ rank=same N17 N18 }
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{ /*14*/ rank=same N19 N20 }
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{ /*15*/ rank=same N21 }
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{ /*16*/ rank=same N22 }
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{ /*17*/ rank=same N23 }
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{ /*18*/ rank=same N24 N25 N26 N27 N28 }
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{ /*19*/ rank=same N29 N30 N31 N32 N33 }
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{ /*20*/ rank=same N34 N35 }
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{ /*21*/ rank=same N36 N37 N38 }
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{ /*22*/ rank=same N39 N40 N41 N42 N43 N44 }
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{ /*23*/ rank=same N45 N46 N47 N48 N49 N50 }
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{ /*24*/ rank=same N51 N52 N53 N54 N55 N56 N57 N58 N59 N60 }
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{ /*25*/ rank=same N61 N62 N63 }
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// Topology
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N0 -> N1
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N1 -> N2
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N2 -> N3
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N3 -> N4
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N4 -> N5
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N5 -> N6
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N6 -> N7
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N23 -> N28
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N25 -> N30
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N26 -> N31
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N27 -> N32
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N28 -> N33
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N29 -> N34
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N32 -> N35
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N36 -> N39
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N38 -> N43
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N38 -> N44
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N39 -> N45
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N39 -> N46
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N39 -> N47
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N40 -> N48
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N40 -> N49
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N40 -> N47
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N41 -> N47
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N42 -> N47
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N43 -> N47
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N44 -> N50
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N45 -> N51
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N46 -> N52
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N47 -> N53
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N47 -> N54
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N47 -> N55
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N47 -> N56
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N47 -> N57
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N48 -> N57
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N49 -> N57
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N50 -> N58
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N50 -> N59
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N50 -> N60
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N50 -> N57
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N51 -> N61
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N51 -> N62
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N51 -> N63
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N52 -> N63
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N53 -> N63
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N54 -> N63
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N55 -> N63
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N56 -> N63
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N57 -> N63
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N58 -> N63
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N59 -> N63
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N60 -> N63
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}
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