allow ARL to switch to check for all memory for load shedding based on config

Summary:
This is to support ARL to switch to check for all memory based on the new enum

- a new enum `CGroupResourceMemoryType` is introduced, `CgroupResources` can be initialized based `CGroupResourceMemoryType` to check `anon` or `all` memory
    - I don't use a flag in config as this flag will not be included in `arlConfig` and every service initialize the resource differently, so I just let the service determine whether they want to initialize with different memory type.

- delete all APIs / counters related to `memAll` as after this diff we will only have one view of mem (more discussion [here](https://fb.workplace.com/groups/proxygendevelopers/posts/3064051317235572/?comment_id=3064123973894973&fbclid=IwZXh0bgNhZW0CMTEAAR0i2R_cHSSEKChgn7vq_1u9aCDnCIY4xzaeHkUyFLqxR4TfbZh55f8kbPI_aem_k0DpcV2UpwH-h4LErupCkA))

See more discussion in https://fb.workplace.com/groups/proxygendevelopers/permalink/3441253179515382/ (S479847). TLDR edgetee OOM because of socket mem but ARL doesn't count it so ARL didn't kick in.

Reviewed By: dddmello

Differential Revision: D67954452

fbshipit-source-id: 3b99555ed644ac57e80da44d7a01c8ae1568a9a9

Author: Rongxin Xia

proxygen/lib/stats/ResourceData.h

@@ -132,14 +132,6 @@ struct ResourceData : public PeriodicStatsDataBase {
     return usedMemBytes_;
   }
 
-  // Similar to getUsedMemBytes but difference is that
-  // `getUsedMemBytes` only contains anon memory while
-  // `getUsedMemBytesAll` contains file cache and all the other
-  // types of memory
-  uint64_t getUsedMemBytesAll() const {
-    return usedMemBytesAll_;
-  }
-
   [[nodiscard]] double getMemPressureAvg10Pct() const {
     return memPressureAvg10Pct_;
   }
@@ -194,15 +186,6 @@ struct ResourceData : public PeriodicStatsDataBase {
     return ((double)usedMemBytes_) / totalMemBytes_ * 100;
   }
 
-  double getUsedMemAllPct() const {
-    return ((double)usedMemBytesAll_) / totalMemBytes_ * 100;
-  }
-
-  // Gets the used total memory (0-1.0) of the system as a ratio
-  double getUsedMemAllRatio() const {
-    return ((double)usedMemBytesAll_) / totalMemBytes_;
-  }
-
   // Gets the used anonymous memory (0-1.0) of the system as a ratio
   double getUsedMemRatio() const {
     return ((double)usedMemBytes_) / totalMemBytes_;
@@ -342,11 +325,8 @@ struct ResourceData : public PeriodicStatsDataBase {
     softIrqCpuCoreRatioUtils_ = std::move(softIrqCpuCoreRatioUtils);
   }
 
-  void setMemStats(uint64_t usedMemBytes,
-                   uint64_t usedMemBytesAll,
-                   uint64_t totalMemBytes) {
+  void setMemStats(uint64_t usedMemBytes, uint64_t totalMemBytes) {
     usedMemBytes_ = usedMemBytes;
-    usedMemBytesAll_ = usedMemBytesAll;
     totalMemBytes_ = totalMemBytes;
   }
 
@@ -411,9 +391,6 @@ struct ResourceData : public PeriodicStatsDataBase {
   double cpuSoftIrqRatioUtil_{0};
   std::vector<double> softIrqCpuCoreRatioUtils_;
   uint64_t usedMemBytes_{0};
-  // usedMemBytes_ contains only anon memory while usedMemBytesAll_ contains
-  // all the memory including file cache.
-  uint64_t usedMemBytesAll_{0};
   uint64_t totalMemBytes_{0};
   uint64_t tcpMemoryPages_{0};
   uint64_t maxTcpMemLimit_{0};

proxygen/lib/stats/test/MockResources.h

@@ -60,7 +60,6 @@ class MockResources : public proxygen::Resources {
         std::vector<double>(params.numCpuCores, params.cpuSoftIrqUtilRatio));
     uint64_t totalMemBytes = 100;
     data.setMemStats(
-        folly::to<uint64_t>(round(params.memUtilRatio * totalMemBytes)),
         folly::to<uint64_t>(round(params.memUtilRatio * totalMemBytes)),
         totalMemBytes);
     uint64_t totalNetMemBytes = 100;