populate link_layer_flow_control_watermark counter to fb303c

Summary: as titled Reviewed By: zechengh09 Differential Revision: D65899292 Privacy Context Container: L1125642 fbshipit-source-id: 8b27ae2cf212efc3ea54c1b0f45f2e705524ff02
facebook · Nov 13, 2024 · 718e8c8 · 718e8c8
1 parent ac45b6a
commit 718e8c8
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diff --git a/fboss/agent/hw/HwPortFb303Stats.cpp b/fboss/agent/hw/HwPortFb303Stats.cpp
@@ -52,6 +52,7 @@ HwPortFb303Stats::kPortMonotonicCounterStatKeys() const {
       kOutForwardingDiscards(),
       kPqpErrorEgressDroppedPackets(),
       kFabricLinkDownDroppedCells(),
+      kLinkLayerFlowControlWatermark(),
   };
   return kPortKeys;
 }
@@ -224,6 +225,12 @@ void HwPortFb303Stats::updateStats(
         statName(kDataCellsFilterOn(), portName()),
         *curPortStats.dataCellsFilterOn() ? 1 : 0);
   }
+  if (curPortStats.linkLayerFlowControlWatermark_().has_value()) {
+    updateStat(
+        timeRetrieved_,
+        kLinkLayerFlowControlWatermark(),
+        *curPortStats.linkLayerFlowControlWatermark_());
+  }
 
   // Update queue stats
   auto updateQueueStat = [this](

diff --git a/fboss/agent/hw/StatsConstants.h b/fboss/agent/hw/StatsConstants.h
@@ -307,4 +307,8 @@ inline folly::StringPiece constexpr kCableLengthMeters() {
 inline folly::StringPiece constexpr kDataCellsFilterOn() {
   return "data_cells_filter_on";
 }
+
+inline folly::StringPiece constexpr kLinkLayerFlowControlWatermark() {
+  return "link_layer_flow_control_watermark";
+}
 } // namespace facebook::fboss