Do not add the TCP buffer length.

src/core/lib/iomgr/buffer_list.cc

@@ -30,10 +30,9 @@
 
 namespace grpc_core {
 void TracedBuffer::AddNewEntry(TracedBuffer** head, uint32_t seq_no,
-                               uint32_t length, void* arg) {
+                               void* arg) {
   GPR_DEBUG_ASSERT(head != nullptr);
   TracedBuffer* new_elem = New<TracedBuffer>(seq_no, arg);
-  new_elem->ts_.length = length;
   /* Store the current time as the sendmsg time. */
   new_elem->ts_.sendmsg_time = gpr_now(GPR_CLOCK_REALTIME);
   if (*head == nullptr) {

src/core/lib/iomgr/buffer_list.h

@@ -58,7 +58,7 @@ class TracedBuffer {
   /** Add a new entry in the TracedBuffer list pointed to by head. Also saves
    * sendmsg_time with the current timestamp. */
   static void AddNewEntry(grpc_core::TracedBuffer** head, uint32_t seq_no,
-                          uint32_t length, void* arg);
+                          void* arg);
 
   /** Processes a received timestamp based on sock_extended_err and
    * scm_timestamping structures. It will invoke the timestamps callback if the

src/core/lib/iomgr/tcp_posix.cc

@@ -635,7 +635,7 @@ static bool tcp_write_with_timestamps(grpc_tcp* tcp, struct msghdr* msg,
     gpr_mu_lock(&tcp->tb_mu);
     grpc_core::TracedBuffer::AddNewEntry(
         &tcp->tb_head, static_cast<uint32_t>(tcp->bytes_counter + length),
-        static_cast<uint32_t>(length), tcp->outgoing_buffer_arg);
+        tcp->outgoing_buffer_arg);
     gpr_mu_unlock(&tcp->tb_mu);
     tcp->outgoing_buffer_arg = nullptr;
   }

test/core/iomgr/buffer_list_test.cc

@@ -48,7 +48,7 @@ static void TestShutdownFlushesList() {
   for (auto i = 0; i < NUM_ELEM; i++) {
     gpr_atm_rel_store(&verifier_called[i], static_cast<gpr_atm>(0));
     grpc_core::TracedBuffer::AddNewEntry(
-        &list, i, 0, static_cast<void*>(&verifier_called[i]));
+        &list, i, static_cast<void*>(&verifier_called[i]));
   }
   grpc_core::TracedBuffer::Shutdown(&list, nullptr, GRPC_ERROR_NONE);
   GPR_ASSERT(list == nullptr);
@@ -66,7 +66,6 @@ static void TestVerifierCalledOnAckVerifier(void* arg,
   GPR_ASSERT(ts->acked_time.clock_type == GPR_CLOCK_REALTIME);
   GPR_ASSERT(ts->acked_time.tv_sec == 123);
   GPR_ASSERT(ts->acked_time.tv_nsec == 456);
-  GPR_ASSERT(ts->length == 789);
   gpr_atm* done = reinterpret_cast<gpr_atm*>(arg);
   gpr_atm_rel_store(done, static_cast<gpr_atm>(1));
 }
@@ -85,7 +84,7 @@ static void TestVerifierCalledOnAck() {
   grpc_core::TracedBuffer* list = nullptr;
   gpr_atm verifier_called;
   gpr_atm_rel_store(&verifier_called, static_cast<gpr_atm>(0));
-  grpc_core::TracedBuffer::AddNewEntry(&list, 213, 789, &verifier_called);
+  grpc_core::TracedBuffer::AddNewEntry(&list, 213, &verifier_called);
   grpc_core::TracedBuffer::ProcessTimestamp(&list, &serr, &tss);
   GPR_ASSERT(gpr_atm_acq_load(&verifier_called) == static_cast<gpr_atm>(1));
   GPR_ASSERT(list == nullptr);