qqvpp commented on code in PR #8726:
URL: https://github.com/apache/hadoop/pull/8726#discussion_r4147651929
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsV2ResourceCalculator.java:
##########
@@ -110,11 +110,24 @@ public CGroupsV2ResourceCalculator(String pid) {
super(
pid,
Collections.singletonList(CPU_STAT),
- MEM_STAT,
- MEMSW_STAT
+ MEM_STAT
);
}
+ @Override
+ protected long calculateVirtualMemory() {
+ // Unlike cgroup v1, cgroup v2 does not expose a combined memory+swap
+ // counter. The virtual memory has to be derived by adding the swap usage
+ // (memory.swap.current) to the resident anonymous memory
+ // (memory.stat#anon).
+ long anon = getStat(MEM_STAT);
Review Comment:
Thank you for pointing this out. You are right — memory.current should
exactly match the way it is accounted for in cgroup v1. I’ve updated the
implementation accordingly, and instead of memory.stat#anon, it now uses
memory.current.
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