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3e2a1ea958
Signals that separate a sync that is merely slow from one that will never
finish:
- sync_acquire{missing_state_nodes_max, missing_tx_nodes_max, in_flight,
received_data_depth}: how many SHAMap nodes each in-flight acquire is
still waiting for. getMissingNodes already computed this and the callers
discarded it after a trace log. A count that stays flat means the
acquire is wedged; a shrinking count means it is progressing. Recorded
once per sweep, never inside the per-node walk, and reset when a tree
completes so a finished acquire does not read as stuck forever.
- shamap_cache_hit_rate{treenode}: hit rate of the in-memory tree-node
cache, which sits above the node store, so it is distinct from the
existing NuDB ratio. A cold cache on a fresh node sends every traversal
step to disk.
- sync_acquire_no_progress_total: timer ticks where an acquire made no
progress, previously only logged.
- sync_addnode_total{good,duplicate,invalid}: whether arriving nodes are
useful, duplicated or rejected, so wasted fetch work is visible.
- sync_acquire_source_total{local,network}: whether a ledger was served
from the local store or had to be fetched.
Adds getBad()/getDuplicate() to SHAMapAddNode and an acquireProgress()
accessor on InboundLedgers so the xrpld gauge can read these without
libxrpl depending on telemetry.
ledger_seq is deliberately not a metric label: it is unbounded. Per-ledger
identity stays on the ledger.acquire span; the metrics expose bounded
aggregates instead.
The full-below cache hit rate is not exported: KeyCache updates different
counters than getHitRate() reads, so it would always report zero. That
libxrpl bug is documented rather than papered over.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
198 lines
3.4 KiB
C++
198 lines
3.4 KiB
C++
#pragma once
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#include <string>
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namespace xrpl {
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// results of adding nodes
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class SHAMapAddNode
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{
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private:
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int good_;
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int bad_;
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int duplicate_;
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public:
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SHAMapAddNode();
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void
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incInvalid();
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void
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incUseful();
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void
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incDuplicate();
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void
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reset();
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[[nodiscard]] int
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getGood() const;
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/**
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* Nodes rejected as invalid in this tally.
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*
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* Complements getGood(): isInvalid() only answers "was there at least one",
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* which cannot distinguish one bad node from a peer sending nothing but bad
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* data. Exposed for the acquire telemetry counters, which need the count.
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*
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* @return Number of invalid nodes; 0 if none.
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*/
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[[nodiscard]] int
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getBad() const;
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/**
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* Nodes already held, so re-receiving them was wasted work.
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*
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* A high duplicate share against a low good share means peers are re-sending
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* data the node already has, which looks like healthy traffic but makes no
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* acquire progress.
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*
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* @return Number of duplicate nodes; 0 if none.
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*/
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[[nodiscard]] int
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getDuplicate() const;
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[[nodiscard]] bool
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isGood() const;
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[[nodiscard]] bool
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isInvalid() const;
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[[nodiscard]] bool
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isUseful() const;
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[[nodiscard]] std::string
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get() const;
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SHAMapAddNode&
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operator+=(SHAMapAddNode const& n);
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static SHAMapAddNode
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duplicate();
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static SHAMapAddNode
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useful();
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static SHAMapAddNode
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invalid();
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private:
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SHAMapAddNode(int good, int bad, int duplicate);
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};
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inline SHAMapAddNode::SHAMapAddNode() : good_(0), bad_(0), duplicate_(0)
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{
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}
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inline SHAMapAddNode::SHAMapAddNode(int good, int bad, int duplicate)
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: good_(good), bad_(bad), duplicate_(duplicate)
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{
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}
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inline void
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SHAMapAddNode::incInvalid()
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{
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++bad_;
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}
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inline void
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SHAMapAddNode::incUseful()
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{
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++good_;
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}
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inline void
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SHAMapAddNode::incDuplicate()
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{
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++duplicate_;
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}
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inline void
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SHAMapAddNode::reset()
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{
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good_ = bad_ = duplicate_ = 0;
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}
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inline int
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SHAMapAddNode::getGood() const
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{
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return good_;
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}
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inline int
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SHAMapAddNode::getBad() const
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{
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return bad_;
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}
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inline int
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SHAMapAddNode::getDuplicate() const
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{
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return duplicate_;
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}
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inline bool
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SHAMapAddNode::isInvalid() const
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{
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return bad_ > 0;
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}
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inline bool
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SHAMapAddNode::isUseful() const
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{
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return good_ > 0;
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}
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inline SHAMapAddNode&
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SHAMapAddNode::operator+=(SHAMapAddNode const& n)
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{
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good_ += n.good_;
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bad_ += n.bad_;
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duplicate_ += n.duplicate_;
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return *this;
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}
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inline bool
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SHAMapAddNode::isGood() const
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{
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return (good_ + duplicate_) > bad_;
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}
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inline SHAMapAddNode
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SHAMapAddNode::duplicate()
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{
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return SHAMapAddNode(0, 0, 1);
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}
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inline SHAMapAddNode
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SHAMapAddNode::useful()
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{
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return SHAMapAddNode(1, 0, 0);
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}
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inline SHAMapAddNode
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SHAMapAddNode::invalid()
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{
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return SHAMapAddNode(0, 1, 0);
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}
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inline std::string
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SHAMapAddNode::get() const
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{
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std::string ret;
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if (good_ > 0)
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{
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ret.append("good:");
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ret.append(std::to_string(good_));
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}
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if (bad_ > 0)
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{
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if (!ret.empty())
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ret.append(" ");
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ret.append("bad:");
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ret.append(std::to_string(bad_));
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}
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if (duplicate_ > 0)
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{
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if (!ret.empty())
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ret.append(" ");
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ret.append("dupe:");
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ret.append(std::to_string(duplicate_));
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}
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if (ret.empty())
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ret = "no nodes processed";
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return ret;
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}
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} // namespace xrpl
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