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YARN-5969. FairShareComparator: Cache value of getResourceUsage for better performance. (zhangshilong via kasha)

This commit is contained in:
Karthik Kambatla 2016-12-27 12:30:35 -08:00
parent c0e0ef2969
commit c3973e7080
1 changed files with 11 additions and 8 deletions
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19
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
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@ -79,29 +79,32 @@ public class FairSharePolicy extends SchedulingPolicy {
double minShareRatio1, minShareRatio2;
double useToWeightRatio1, useToWeightRatio2;
double weight1, weight2;
//Do not repeat the getResourceUsage calculation
Resource resourceUsage1 = s1.getResourceUsage();
Resource resourceUsage2 = s2.getResourceUsage();
Resource minShare1 = Resources.min(RESOURCE_CALCULATOR, null,
s1.getMinShare(), s1.getDemand());
Resource minShare2 = Resources.min(RESOURCE_CALCULATOR, null,
s2.getMinShare(), s2.getDemand());
boolean s1Needy = Resources.lessThan(RESOURCE_CALCULATOR, null,
s1.getResourceUsage(), minShare1);
resourceUsage1, minShare1);
boolean s2Needy = Resources.lessThan(RESOURCE_CALCULATOR, null,
s2.getResourceUsage(), minShare2);
minShareRatio1 = (double) s1.getResourceUsage().getMemorySize()
resourceUsage2, minShare2);
minShareRatio1 = (double) resourceUsage1.getMemorySize()
/ Resources.max(RESOURCE_CALCULATOR, null, minShare1, ONE).getMemorySize();
minShareRatio2 = (double) s2.getResourceUsage().getMemorySize()
minShareRatio2 = (double) resourceUsage2.getMemorySize()
/ Resources.max(RESOURCE_CALCULATOR, null, minShare2, ONE).getMemorySize();
weight1 = s1.getWeights().getWeight(ResourceType.MEMORY);
weight2 = s2.getWeights().getWeight(ResourceType.MEMORY);
if (weight1 > 0.0 && weight2 > 0.0) {
useToWeightRatio1 = s1.getResourceUsage().getMemorySize() / weight1;
useToWeightRatio2 = s2.getResourceUsage().getMemorySize() / weight2;
useToWeightRatio1 = resourceUsage1.getMemorySize() / weight1;
useToWeightRatio2 = resourceUsage2.getMemorySize() / weight2;
} else { // Either weight1 or weight2 equals to 0
if (weight1 == weight2) {
// If they have same weight, just compare usage
useToWeightRatio1 = s1.getResourceUsage().getMemorySize();
useToWeightRatio2 = s2.getResourceUsage().getMemorySize();
useToWeightRatio1 = resourceUsage1.getMemorySize();
useToWeightRatio2 = resourceUsage2.getMemorySize();
} else {
// By setting useToWeightRatios to negative weights, we give the
// zero-weight one less priority, so the non-zero weight one will