diff --git a/src/runtime/netpoll.go b/src/runtime/netpoll.go
index 56fb286c3c..8dd4fb6319 100644
--- a/src/runtime/netpoll.go
+++ b/src/runtime/netpoll.go
@@ -105,10 +105,10 @@ func poll_runtime_pollOpen(fd uintptr) (*pollDesc, int) {
 	pd := pollcache.alloc()
 	lock(&pd.lock)
 	if pd.wg != 0 && pd.wg != pdReady {
-		throw("netpollOpen: blocked write on free descriptor")
+		throw("runtime: blocked write on free polldesc")
 	}
 	if pd.rg != 0 && pd.rg != pdReady {
-		throw("netpollOpen: blocked read on free descriptor")
+		throw("runtime: blocked read on free polldesc")
 	}
 	pd.fd = fd
 	pd.closing = false
@@ -127,13 +127,13 @@ func poll_runtime_pollOpen(fd uintptr) (*pollDesc, int) {
 //go:linkname poll_runtime_pollClose internal/poll.runtime_pollClose
 func poll_runtime_pollClose(pd *pollDesc) {
 	if !pd.closing {
-		throw("netpollClose: close w/o unblock")
+		throw("runtime: close polldesc w/o unblock")
 	}
 	if pd.wg != 0 && pd.wg != pdReady {
-		throw("netpollClose: blocked write on closing descriptor")
+		throw("runtime: blocked write on closing polldesc")
 	}
 	if pd.rg != 0 && pd.rg != pdReady {
-		throw("netpollClose: blocked read on closing descriptor")
+		throw("runtime: blocked read on closing polldesc")
 	}
 	netpollclose(pd.fd)
 	pollcache.free(pd)
@@ -264,7 +264,7 @@ func poll_runtime_pollSetDeadline(pd *pollDesc, d int64, mode int) {
 func poll_runtime_pollUnblock(pd *pollDesc) {
 	lock(&pd.lock)
 	if pd.closing {
-		throw("netpollUnblock: already closing")
+		throw("runtime: unblock on closing polldesc")
 	}
 	pd.closing = true
 	pd.seq++
@@ -352,7 +352,7 @@ func netpollblock(pd *pollDesc, mode int32, waitio bool) bool {
 			return true
 		}
 		if old != 0 {
-			throw("netpollblock: double wait")
+			throw("runtime: double wait")
 		}
 		if atomic.Casuintptr(gpp, 0, pdWait) {
 			break
@@ -368,7 +368,7 @@ func netpollblock(pd *pollDesc, mode int32, waitio bool) bool {
 	// be careful to not lose concurrent READY notification
 	old := atomic.Xchguintptr(gpp, 0)
 	if old > pdWait {
-		throw("netpollblock: corrupted state")
+		throw("runtime: corrupted polldesc")
 	}
 	return old == pdReady
 }
@@ -414,7 +414,7 @@ func netpolldeadlineimpl(pd *pollDesc, seq uintptr, read, write bool) {
 	var rg *g
 	if read {
 		if pd.rd <= 0 || pd.rt.f == nil {
-			throw("netpolldeadlineimpl: inconsistent read deadline")
+			throw("runtime: inconsistent read deadline")
 		}
 		pd.rd = -1
 		atomicstorep(unsafe.Pointer(&pd.rt.f), nil) // full memory barrier between store to rd and load of rg in netpollunblock
@@ -423,7 +423,7 @@ func netpolldeadlineimpl(pd *pollDesc, seq uintptr, read, write bool) {
 	var wg *g
 	if write {
 		if pd.wd <= 0 || pd.wt.f == nil && !read {
-			throw("netpolldeadlineimpl: inconsistent write deadline")
+			throw("runtime: inconsistent write deadline")
 		}
 		pd.wd = -1
 		atomicstorep(unsafe.Pointer(&pd.wt.f), nil) // full memory barrier between store to wd and load of wg in netpollunblock
diff --git a/src/runtime/netpoll_epoll.go b/src/runtime/netpoll_epoll.go
index 63f943bc6a..1908220ebb 100644
--- a/src/runtime/netpoll_epoll.go
+++ b/src/runtime/netpoll_epoll.go
@@ -32,8 +32,8 @@ func netpollinit() {
 		closeonexec(epfd)
 		return
 	}
-	println("netpollinit: failed to create epoll descriptor", -epfd)
-	throw("netpollinit: failed to create descriptor")
+	println("runtime: epollcreate failed with", -epfd)
+	throw("runtime: netpollinit failed")
 }
 
 func netpolldescriptor() uintptr {
@@ -53,7 +53,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	throw("unused")
+	throw("runtime: unused")
 }
 
 // polls for ready network connections
@@ -72,7 +72,7 @@ retry:
 	if n < 0 {
 		if n != -_EINTR {
 			println("runtime: epollwait on fd", epfd, "failed with", -n)
-			throw("epollwait failed")
+			throw("runtime: netpoll failed")
 		}
 		goto retry
 	}
diff --git a/src/runtime/netpoll_kqueue.go b/src/runtime/netpoll_kqueue.go
index 5adf19ca09..71de98bcd6 100644
--- a/src/runtime/netpoll_kqueue.go
+++ b/src/runtime/netpoll_kqueue.go
@@ -23,8 +23,8 @@ var (
 func netpollinit() {
 	kq = kqueue()
 	if kq < 0 {
-		println("netpollinit: kqueue failed with", -kq)
-		throw("netpollinit: kqueue failed")
+		println("runtime: kqueue failed with", -kq)
+		throw("runtime: netpollinit failed")
 	}
 	closeonexec(kq)
 }
@@ -60,7 +60,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	throw("unused")
+	throw("runtime: unused")
 }
 
 // Polls for ready network connections.
@@ -80,7 +80,7 @@ retry:
 	if n < 0 {
 		if n != -_EINTR {
 			println("runtime: kevent on fd", kq, "failed with", -n)
-			throw("kevent failed")
+			throw("runtime: netpoll failed")
 		}
 		goto retry
 	}
diff --git a/src/runtime/netpoll_solaris.go b/src/runtime/netpoll_solaris.go
index a19bd16fd2..853e5f63e3 100644
--- a/src/runtime/netpoll_solaris.go
+++ b/src/runtime/netpoll_solaris.go
@@ -117,8 +117,8 @@ func netpollinit() {
 		return
 	}
 
-	print("netpollinit: failed to create port (", errno(), ")\n")
-	throw("netpollinit: failed to create port")
+	print("runtime: port_create failed (errno=", errno(), ")\n")
+	throw("runtime: netpollinit failed")
 }
 
 func netpolldescriptor() uintptr {
@@ -158,8 +158,8 @@ func netpollupdate(pd *pollDesc, set, clear uint32) {
 	}
 
 	if events != 0 && port_associate(portfd, _PORT_SOURCE_FD, pd.fd, events, uintptr(unsafe.Pointer(pd))) != 0 {
-		print("netpollupdate: failed to associate (", errno(), ")\n")
-		throw("netpollupdate: failed to associate")
+		print("runtime: port_associate failed (errno=", errno(), ")\n")
+		throw("runtime: netpollupdate failed")
 	}
 	pd.user = events
 }
@@ -173,7 +173,7 @@ func netpollarm(pd *pollDesc, mode int) {
 	case 'w':
 		netpollupdate(pd, _POLLOUT, 0)
 	default:
-		throw("netpollarm: bad mode")
+		throw("runtime: bad mode")
 	}
 	unlock(&pd.lock)
 }
@@ -196,8 +196,8 @@ retry:
 	var n uint32 = 1
 	if port_getn(portfd, &events[0], uint32(len(events)), &n, wait) < 0 {
 		if e := errno(); e != _EINTR {
-			print("runtime: port_getn on fd ", portfd, " failed with ", e, "\n")
-			throw("port_getn failed")
+			print("runtime: port_getn on fd ", portfd, " failed (errno=", e, ")\n")
+			throw("runtime: netpoll failed")
 		}
 		goto retry
 	}
diff --git a/src/runtime/netpoll_windows.go b/src/runtime/netpoll_windows.go
index d714d0ac6e..79dafb0279 100644
--- a/src/runtime/netpoll_windows.go
+++ b/src/runtime/netpoll_windows.go
@@ -36,8 +36,8 @@ var iocphandle uintptr = _INVALID_HANDLE_VALUE // completion port io handle
 func netpollinit() {
 	iocphandle = stdcall4(_CreateIoCompletionPort, _INVALID_HANDLE_VALUE, 0, 0, _DWORD_MAX)
 	if iocphandle == 0 {
-		println("netpoll: failed to create iocp handle (errno=", getlasterror(), ")")
-		throw("netpoll: failed to create iocp handle")
+		println("runtime: CreateIoCompletionPort failed (errno=", getlasterror(), ")")
+		throw("runtime: netpollinit failed")
 	}
 }
 
@@ -58,7 +58,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	throw("unused")
+	throw("runtime: unused")
 }
 
 // Polls for completed network IO.
@@ -94,8 +94,8 @@ retry:
 			if !block && errno == _WAIT_TIMEOUT {
 				return nil
 			}
-			println("netpoll: GetQueuedCompletionStatusEx failed (errno=", errno, ")")
-			throw("netpoll: GetQueuedCompletionStatusEx failed")
+			println("runtime: GetQueuedCompletionStatusEx failed (errno=", errno, ")")
+			throw("runtime: netpoll failed")
 		}
 		mp.blocked = false
 		for i = 0; i < n; i++ {
@@ -121,8 +121,8 @@ retry:
 				return nil
 			}
 			if op == nil {
-				println("netpoll: GetQueuedCompletionStatus failed (errno=", errno, ")")
-				throw("netpoll: GetQueuedCompletionStatus failed")
+				println("runtime: GetQueuedCompletionStatus failed (errno=", errno, ")")
+				throw("runtime: netpoll failed")
 			}
 			// dequeued failed IO packet, so report that
 		}
@@ -137,12 +137,13 @@ retry:
 
 func handlecompletion(gpp *guintptr, op *net_op, errno int32, qty uint32) {
 	if op == nil {
-		throw("netpoll: GetQueuedCompletionStatus returned op == nil")
+		println("runtime: GetQueuedCompletionStatus returned op == nil")
+		throw("runtime: netpoll failed")
 	}
 	mode := op.mode
 	if mode != 'r' && mode != 'w' {
-		println("netpoll: GetQueuedCompletionStatus returned invalid mode=", mode)
-		throw("netpoll: GetQueuedCompletionStatus returned invalid mode")
+		println("runtime: GetQueuedCompletionStatus returned invalid mode=", mode)
+		throw("runtime: netpoll failed")
 	}
 	op.errno = errno
 	op.qty = qty