diff --git a/src/main/java/com/google/devtools/build/lib/metrics/BUILD b/src/main/java/com/google/devtools/build/lib/metrics/BUILD
index 6015565..a4f89c1 100644
--- a/src/main/java/com/google/devtools/build/lib/metrics/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/metrics/BUILD
@@ -49,6 +49,7 @@
         "//src/main/java/com/google/devtools/build/lib/packages/metrics:package_load_metrics_java_proto",
         "//src/main/java/com/google/devtools/build/lib/profiler",
         "//src/main/java/com/google/devtools/build/lib/profiler:network_metrics_collector",
+        "//src/main/java/com/google/devtools/build/lib/sandbox:cgroups_info",
         "//src/main/java/com/google/devtools/build/lib/skyframe:execution_finished_event",
         "//src/main/java/com/google/devtools/build/lib/skyframe:top_level_status_events",
         "//src/main/java/com/google/devtools/build/lib/worker:worker_process_metrics",
@@ -88,13 +89,15 @@
 )
 
 java_library(
-    name = "ps_info_collector",
+    name = "resource_collector",
     srcs = [
+        "CgroupsInfoCollector.java",
         "PsInfoCollector.java",
         "ResourceSnapshot.java",
     ],
     deps = [
         "//src/main/java/com/google/devtools/build/lib/clock",
+        "//src/main/java/com/google/devtools/build/lib/sandbox:cgroups_info",
         "//third_party:auto_value",
         "//third_party:flogger",
         "//third_party:guava",
diff --git a/src/main/java/com/google/devtools/build/lib/metrics/CgroupsInfoCollector.java b/src/main/java/com/google/devtools/build/lib/metrics/CgroupsInfoCollector.java
new file mode 100644
index 0000000..684d875
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/metrics/CgroupsInfoCollector.java
@@ -0,0 +1,51 @@
+// Copyright 2024 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.metrics;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.clock.Clock;
+import com.google.devtools.build.lib.sandbox.CgroupsInfo;
+import java.util.Map;
+
+/** Collects resource usage of processes from their cgroups {@code CgroupsInfo}. */
+public class CgroupsInfoCollector {
+  // TODO(b/292634407, b/323341972): Extract a common interface between CgroupsInfoCollector and
+  //  PsInfoCollector to be passed to the WorkerProcessMetricsCollector. Then make both classes
+  //  final.
+
+  // Mainly a singleton for mocking purposes. But also useful if we want to persist additional
+  // state as in the PsInfoCollector.
+  private static final CgroupsInfoCollector instance = new CgroupsInfoCollector();
+
+  private CgroupsInfoCollector() {}
+
+  public static CgroupsInfoCollector instance() {
+    return instance;
+  }
+
+  public ResourceSnapshot collectResourceUsage(Map<Long, CgroupsInfo> pidToCgroups, Clock clock) {
+    ImmutableMap.Builder<Long, Integer> pidToMemoryInKb = ImmutableMap.builder();
+
+    for (Map.Entry<Long, CgroupsInfo> entry : pidToCgroups.entrySet()) {
+      CgroupsInfo cgroup = entry.getValue();
+      // TODO(b/292634407): Consider how to handle the unlikely case where only some cgroups are
+      //  invalid.
+      if (cgroup.exists()) {
+        pidToMemoryInKb.put(entry.getKey(), entry.getValue().getMemoryUsageInKb());
+      }
+    }
+    return ResourceSnapshot.create(pidToMemoryInKb.buildOrThrow(), clock.now());
+  }
+}
diff --git a/src/main/java/com/google/devtools/build/lib/metrics/PsInfoCollector.java b/src/main/java/com/google/devtools/build/lib/metrics/PsInfoCollector.java
index 00cd48f..f39bc70 100644
--- a/src/main/java/com/google/devtools/build/lib/metrics/PsInfoCollector.java
+++ b/src/main/java/com/google/devtools/build/lib/metrics/PsInfoCollector.java
@@ -24,7 +24,6 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSetMultimap;
 import com.google.common.flogger.GoogleLogger;
-import com.google.devtools.build.lib.clock.BlazeClock;
 import com.google.devtools.build.lib.clock.Clock;
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -42,7 +41,6 @@
   // Updates snapshots no more than once per interval. Running ps is somewhat slow and should not be
   // done too often.
   private static final Duration MIN_COLLECTION_INTERVAL = Duration.ofMillis(500);
-  private static final Clock clock = BlazeClock.instance();
   private static final PsInfoCollector instance = new PsInfoCollector();
 
   public static PsInfoCollector instance() {
@@ -58,14 +56,15 @@
    * If ps snapshot was outdated will update it, and then returns resource consumption snapshot of
    * processes subtrees based on collected ps snapshot.
    */
-  public synchronized ResourceSnapshot collectResourceUsage(ImmutableSet<Long> processIds) {
+  public synchronized ResourceSnapshot collectResourceUsage(
+      ImmutableSet<Long> processIds, Clock clock) {
     Instant now = clock.now();
     if (currentPsSnapshot == null
         || Duration.between(currentPsSnapshot.getCollectionTime(), now)
                 .compareTo(MIN_COLLECTION_INTERVAL)
             > 0) {
 
-      updatePsSnapshot();
+      updatePsSnapshot(clock);
     }
 
     ImmutableMap.Builder<Long, Integer> pidToMemoryInKb = ImmutableMap.builder();
@@ -82,7 +81,7 @@
   }
 
   /** Updates current snapshot of all processes state, using ps command. */
-  private void updatePsSnapshot() {
+  private void updatePsSnapshot(Clock clock) {
     // TODO(b/279003887): add exception if we couldn't collect the metrics.
     ImmutableMap<Long, PsInfo> pidToPsInfo = collectDataFromPs();
 
diff --git a/src/main/java/com/google/devtools/build/lib/metrics/ResourceSnapshot.java b/src/main/java/com/google/devtools/build/lib/metrics/ResourceSnapshot.java
index 99009f7..5a3d693 100644
--- a/src/main/java/com/google/devtools/build/lib/metrics/ResourceSnapshot.java
+++ b/src/main/java/com/google/devtools/build/lib/metrics/ResourceSnapshot.java
@@ -32,7 +32,7 @@
     return new AutoValue_ResourceSnapshot(pidToMemoryInKb, collectionTime);
   }
 
-  public static ResourceSnapshot createEmpty() {
-    return new AutoValue_ResourceSnapshot(ImmutableMap.of(), Instant.now());
+  public static ResourceSnapshot createEmpty(Instant collectionTime) {
+    return new AutoValue_ResourceSnapshot(ImmutableMap.of(), collectionTime);
   }
 }
diff --git a/src/main/java/com/google/devtools/build/lib/sandbox/BUILD b/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
index 88714c3..25421fc 100644
--- a/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
@@ -194,15 +194,13 @@
 java_library(
     name = "linux_sandbox",
     srcs = [
-        "CgroupsInfo.java",
-        "CgroupsInfoV1.java",
-        "CgroupsInfoV2.java",
         "LinuxSandboxedSpawnRunner.java",
         "LinuxSandboxedStrategy.java",
     ],
     data = ["//src/main/tools:linux-sandbox"],
     deps = [
         ":abstract_sandbox_spawn_runner",
+        ":cgroups_info",
         ":linux_sandbox_command_line_builder",
         ":linux_sandbox_util",
         ":sandbox_helpers",
@@ -226,6 +224,20 @@
         "//src/main/java/com/google/devtools/build/lib/util:os",
         "//src/main/java/com/google/devtools/build/lib/vfs",
         "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
+        "//third_party:guava",
+        "//third_party:jsr305",
+    ],
+)
+
+java_library(
+    name = "cgroups_info",
+    srcs = [
+        "CgroupsInfo.java",
+        "CgroupsInfoV1.java",
+        "CgroupsInfoV2.java",
+    ],
+    deps = [
+        "//src/main/java/com/google/devtools/build/lib/util:os",
         "//third_party:flogger",
         "//third_party:guava",
         "//third_party:jsr305",
diff --git a/src/main/java/com/google/devtools/build/lib/worker/BUILD b/src/main/java/com/google/devtools/build/lib/worker/BUILD
index cf14e15..13ff305 100644
--- a/src/main/java/com/google/devtools/build/lib/worker/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/worker/BUILD
@@ -158,7 +158,7 @@
         ":worker_process_status",
         "//src/main/java/com/google/devtools/build/lib/buildeventstream/proto:build_event_stream_java_proto",
         "//src/main/java/com/google/devtools/build/lib/clock",
-        "//src/main/java/com/google/devtools/build/lib/metrics:ps_info_collector",
+        "//src/main/java/com/google/devtools/build/lib/metrics:resource_collector",
         "//src/main/java/com/google/devtools/build/lib/util:os",
         "//third_party:guava",
     ],
@@ -272,7 +272,7 @@
         "//src/main/java/com/google/devtools/build/lib/actions",
         "//src/main/java/com/google/devtools/build/lib/exec:tree_deleter",
         "//src/main/java/com/google/devtools/build/lib/profiler",
-        "//src/main/java/com/google/devtools/build/lib/sandbox:linux_sandbox",
+        "//src/main/java/com/google/devtools/build/lib/sandbox:cgroups_info",
         "//src/main/java/com/google/devtools/build/lib/sandbox:linux_sandbox_command_line_builder",
         "//src/main/java/com/google/devtools/build/lib/sandbox:linux_sandbox_util",
         "//src/main/java/com/google/devtools/build/lib/sandbox:sandbox_helpers",
diff --git a/src/main/java/com/google/devtools/build/lib/worker/WorkerProcessMetricsCollector.java b/src/main/java/com/google/devtools/build/lib/worker/WorkerProcessMetricsCollector.java
index ba998a2..d80bb78 100644
--- a/src/main/java/com/google/devtools/build/lib/worker/WorkerProcessMetricsCollector.java
+++ b/src/main/java/com/google/devtools/build/lib/worker/WorkerProcessMetricsCollector.java
@@ -76,12 +76,12 @@
   ResourceSnapshot collectResourceUsage(OS os, ImmutableSet<Long> processIds) {
     // TODO(b/181317827): Support Windows.
     if (processIds.isEmpty()) {
-      return ResourceSnapshot.createEmpty();
+      return ResourceSnapshot.createEmpty(clock.now());
     }
     if (os == OS.LINUX || os == OS.DARWIN) {
-      return PsInfoCollector.instance().collectResourceUsage(processIds);
+      return PsInfoCollector.instance().collectResourceUsage(processIds, clock);
     }
-    return ResourceSnapshot.createEmpty();
+    return ResourceSnapshot.createEmpty(clock.now());
   }
 
   public ImmutableList<WorkerProcessMetrics> getLiveWorkerProcessMetrics() {