4 files changed, 49 insertions, 4 deletions

diff --git a/src/zencompute/runners/functionrunner.cpp b/src/zencompute/runners/functionrunner.cpp
index f3d5acca5..ab22c6363 100644
--- a/src/zencompute/runners/functionrunner.cpp
+++ b/src/zencompute/runners/functionrunner.cpp
@@ -6,7 +6,9 @@
 
 #	include <zencore/compactbinary.h>
 #	include <zencore/filesystem.h>
+#	include <zencore/fmtutils.h>
 #	include <zencore/logging.h>
+#	include <zencore/string.h>
 #	include <zencore/timer.h>
 #	include <zencore/trace.h>
 #	include <zencore/workthreadpool.h>
@@ -206,16 +208,24 @@ BaseRunnerGroup::SubmitActions(const std::vector<Ref<RunnerAction>>& Actions)
 	static constexpr uint64_t SubmitWarnThresholdMs = 500;
 
 	auto SubmitToRunner = [&](int RunnerIndex) {
+		auto& Runner = Runners[RunnerIndex];
+		Runner->m_LastSubmitStats.Reset();
+
 		Stopwatch Timer;
 
-		PerRunnerResults[RunnerIndex] = Runners[RunnerIndex]->SubmitActions(PerRunnerActions[RunnerIndex]);
+		PerRunnerResults[RunnerIndex] = Runner->SubmitActions(PerRunnerActions[RunnerIndex]);
 
 		uint64_t ElapsedMs = Timer.GetElapsedTimeMs();
 		if (ElapsedMs >= SubmitWarnThresholdMs)
 		{
-			ZEN_WARN("submit of {} actions to '{}' took {}ms",
+			size_t	 Attachments	 = Runner->m_LastSubmitStats.TotalAttachments.load(std::memory_order_relaxed);
+			uint64_t AttachmentBytes = Runner->m_LastSubmitStats.TotalAttachmentBytes.load(std::memory_order_relaxed);
+
+			ZEN_WARN("submit of {} actions ({} attachments, {}) to '{}' took {}ms",
 					 PerRunnerActions[RunnerIndex].size(),
-					 Runners[RunnerIndex]->GetDisplayName(),
+					 Attachments,
+					 NiceBytes(AttachmentBytes),
+					 Runner->GetDisplayName(),
 					 ElapsedMs);
 		}
 	};
diff --git a/src/zencompute/runners/functionrunner.h b/src/zencompute/runners/functionrunner.h
index a8234237c..449f0e228 100644
--- a/src/zencompute/runners/functionrunner.h
+++ b/src/zencompute/runners/functionrunner.h
@@ -43,6 +43,21 @@ public:
 	[[nodiscard]] virtual std::vector<SubmitResult> SubmitActions(const std::vector<Ref<RunnerAction>>& Actions);
 	[[nodiscard]] virtual std::string_view			GetDisplayName() const { return "local"; }
 
+	// Accumulated stats from the most recent SubmitActions call.
+	// Reset before each call, populated by the runner implementation.
+	struct SubmitStats
+	{
+		std::atomic<size_t>	  TotalAttachments{0};
+		std::atomic<uint64_t> TotalAttachmentBytes{0};
+
+		void Reset()
+		{
+			TotalAttachments.store(0, std::memory_order_relaxed);
+			TotalAttachmentBytes.store(0, std::memory_order_relaxed);
+		}
+	};
+	SubmitStats m_LastSubmitStats;
+
 	// Best-effort cancellation of a specific in-flight action. Returns true if the
 	// cancellation signal was successfully sent. The action will transition to Cancelled
 	// asynchronously once the platform-level termination completes.
diff --git a/src/zencompute/runners/remotehttprunner.cpp b/src/zencompute/runners/remotehttprunner.cpp
index 1039969b4..55f78fdd6 100644
--- a/src/zencompute/runners/remotehttprunner.cpp
+++ b/src/zencompute/runners/remotehttprunner.cpp
@@ -39,6 +39,7 @@ RemoteHttpRunner::RemoteHttpRunner(ChunkResolver&				InChunkResolver,
 , m_ChunkResolver{InChunkResolver}
 , m_WorkerPool{InWorkerPool}
 , m_HostName{HostName}
+, m_DisplayName{HostName}
 , m_BaseUrl{fmt::format("{}/compute", HostName)}
 , m_Http(m_BaseUrl)
 , m_InstanceId(Oid::NewOid())
@@ -60,6 +61,15 @@ RemoteHttpRunner::RemoteHttpRunner(ChunkResolver&				InChunkResolver,
 	m_MonitorThread = std::thread{&RemoteHttpRunner::MonitorThreadFunction, this};
 }
 
+void
+RemoteHttpRunner::SetRemoteHostname(std::string_view Hostname)
+{
+	if (!Hostname.empty())
+	{
+		m_DisplayName = fmt::format("{} ({})", m_HostName, Hostname);
+	}
+}
+
 RemoteHttpRunner::~RemoteHttpRunner()
 {
 	Shutdown();
@@ -394,6 +404,8 @@ RemoteHttpRunner::SubmitAction(Ref<RunnerAction> Action)
 					CompressedBuffer::FromCompressed(SharedBuffer{Chunk}, /* out */ DataRawHash, /* out */ DataRawSize);
 
 				Pkg.AddAttachment(CbAttachment(Compressed, AttachHash));
+				m_LastSubmitStats.TotalAttachments.fetch_add(1, std::memory_order_relaxed);
+				m_LastSubmitStats.TotalAttachmentBytes.fetch_add(Chunk.GetSize(), std::memory_order_relaxed);
 			}
 		});
 
@@ -460,6 +472,8 @@ RemoteHttpRunner::SubmitAction(Ref<RunnerAction> Action)
 					ZEN_ASSERT(DataRawHash == NeedHash);
 
 					Pkg.AddAttachment(CbAttachment(Compressed, NeedHash));
+					m_LastSubmitStats.TotalAttachments.fetch_add(1, std::memory_order_relaxed);
+					m_LastSubmitStats.TotalAttachmentBytes.fetch_add(Chunk.GetSize(), std::memory_order_relaxed);
 				}
 				else
 				{
@@ -583,6 +597,8 @@ RemoteHttpRunner::SubmitActionBatch(const std::string& SubmitUrl, const std::vec
 					CompressedBuffer::FromCompressed(SharedBuffer{Chunk}, /* out */ DataRawHash, /* out */ DataRawSize);
 
 				Pkg.AddAttachment(CbAttachment(Compressed, AttachHash));
+				m_LastSubmitStats.TotalAttachments.fetch_add(1, std::memory_order_relaxed);
+				m_LastSubmitStats.TotalAttachmentBytes.fetch_add(Chunk.GetSize(), std::memory_order_relaxed);
 			}
 		}
 
@@ -623,6 +639,8 @@ RemoteHttpRunner::SubmitActionBatch(const std::string& SubmitUrl, const std::vec
 					ZEN_ASSERT(DataRawHash == NeedHash);
 
 					Pkg.AddAttachment(CbAttachment(Compressed, NeedHash));
+					m_LastSubmitStats.TotalAttachments.fetch_add(1, std::memory_order_relaxed);
+					m_LastSubmitStats.TotalAttachmentBytes.fetch_add(Chunk.GetSize(), std::memory_order_relaxed);
 				}
 				else
 				{
diff --git a/src/zencompute/runners/remotehttprunner.h b/src/zencompute/runners/remotehttprunner.h
index 2010c98e8..fdf113c77 100644
--- a/src/zencompute/runners/remotehttprunner.h
+++ b/src/zencompute/runners/remotehttprunner.h
@@ -54,9 +54,10 @@ public:
 	[[nodiscard]] virtual size_t					QueryCapacity() override;
 	[[nodiscard]] virtual std::vector<SubmitResult> SubmitActions(const std::vector<Ref<RunnerAction>>& Actions) override;
 	virtual void									CancelRemoteQueue(int QueueId) override;
-	[[nodiscard]] virtual std::string_view			GetDisplayName() const override { return m_HostName; }
+	[[nodiscard]] virtual std::string_view			GetDisplayName() const override { return m_DisplayName; }
 
 	std::string_view GetHostName() const { return m_HostName; }
+	void			 SetRemoteHostname(std::string_view Hostname);
 
 protected:
 	LoggerRef Log() { return m_Log; }
@@ -66,6 +67,7 @@ private:
 	ChunkResolver&	  m_ChunkResolver;
 	WorkerThreadPool& m_WorkerPool;
 	std::string		  m_HostName;
+	std::string		  m_DisplayName;
 	std::string		  m_BaseUrl;
 	HttpClient		  m_Http;