Trace I/O operations (SQEs, recvmsg/sendmsg, uring_submit)

blockstore_flush.cpp

@@ -33,6 +33,12 @@ journal_flusher_co::journal_flusher_co()
             );
         }
         wait_count--;
+        if (!wait_count)
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
     };
     simple_callback_w = [this](ring_data_t* data)
     {
@@ -45,6 +51,12 @@ journal_flusher_co::journal_flusher_co()
             );
         }
         wait_count--;
+        if (!wait_count)
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
     };
 }
 
@@ -122,6 +134,11 @@ void journal_flusher_t::release_trim()
 
 #define await_sqe(label) \
     resume_##label:\
+        {\
+            timespec now;\
+            clock_gettime(CLOCK_REALTIME, &now);\
+            printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
+        }\
         sqe = bs->get_sqe();\
         if (!sqe)\
         {\

blockstore_impl.h

@@ -62,6 +62,11 @@
     struct ring_data_t *data = ((ring_data_t*)sqe->user_data)
 
 #define BS_SUBMIT_GET_ONLY_SQE(sqe) \
+        {\
+            timespec now;\
+            clock_gettime(CLOCK_REALTIME, &now);\
+            printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
+        }\
     struct io_uring_sqe *sqe = get_sqe();\
     if (!sqe)\
     {\
@@ -71,6 +76,11 @@
     }
 
 #define BS_SUBMIT_GET_SQE_DECL(sqe) \
+        {\
+            timespec now;\
+            clock_gettime(CLOCK_REALTIME, &now);\
+            printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
+        }\
     sqe = get_sqe();\
     if (!sqe)\
     {\

blockstore_stable.cpp

@@ -147,6 +147,11 @@ resume_2:
 resume_3:
     if (!disable_journal_fsync)
     {
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
         io_uring_sqe *sqe = get_sqe();
         if (!sqe)
         {
@@ -237,6 +242,11 @@ void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *
     PRIV(op)->pending_ops--;
     if (PRIV(op)->pending_ops == 0)
     {
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
         PRIV(op)->op_state++;
         if (!continue_stable(op))
         {

blockstore_write.cpp

@@ -302,6 +302,11 @@ int blockstore_impl_t::continue_write(blockstore_op_t *op)
         return 1;
 resume_2:
     // Only for the immediate_commit mode: prepare and submit big_write journal entry
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
     sqe = get_sqe();
     if (!sqe)
     {
@@ -333,6 +338,11 @@ resume_2:
     return 1;
 resume_4:
     // Switch object state
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("write_done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
 #ifdef BLOCKSTORE_DEBUG
     printf("Ack write %lu:%lu v%lu = %d\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
 #endif

epoll_manager.cpp

@@ -57,6 +57,11 @@ void epoll_manager_t::set_fd_handler(int fd, std::function<void(int, int)> handl
 
 void epoll_manager_t::handle_epoll_events()
 {
+    {
+        timespec now;
+        clock_gettime(CLOCK_REALTIME, &now);
+        printf("epoll %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+    }
     io_uring_sqe *sqe = ringloop->get_sqe();
     if (!sqe)
     {

msgr_receive.cpp

@@ -2,17 +2,10 @@
 
 void osd_messenger_t::read_requests()
 {
-    for (int i = 0; i < read_ready_clients.size(); i++)
+    while (read_ready_clients.size() > 0)
     {
-        int peer_fd = read_ready_clients[i];
+        int peer_fd = read_ready_clients[0];
         auto & cl = clients[peer_fd];
-        io_uring_sqe* sqe = ringloop->get_sqe();
-        if (!sqe)
-        {
-            read_ready_clients.erase(read_ready_clients.begin(), read_ready_clients.begin() + i);
-            return;
-        }
-        ring_data_t* data = ((ring_data_t*)sqe->user_data);
         if (!cl.read_op || cl.read_remaining < receive_buffer_size)
         {
             cl.read_iov.iov_base = cl.in_buf;
@@ -25,10 +18,19 @@ void osd_messenger_t::read_requests()
         }
         cl.read_msg.msg_iov = &cl.read_iov;
         cl.read_msg.msg_iovlen = 1;
-        data->callback = [this, peer_fd](ring_data_t *data) { handle_read(data->res, peer_fd); };
-        my_uring_prep_recvmsg(sqe, peer_fd, &cl.read_msg, 0);
+        read_ready_clients.erase(read_ready_clients.begin(), read_ready_clients.begin() + 1);
+        int result = recvmsg(peer_fd, &cl.read_msg, 0);
+        if (result < 0)
+        {
+            result = -errno;
+        }
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("recvmsg done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
+        handle_read(result, peer_fd);
     }
-    read_ready_clients.clear();
 }
 
 bool osd_messenger_t::handle_read(int result, int peer_fd)

msgr_send.cpp

@@ -42,12 +42,6 @@ void osd_messenger_t::outbox_push(osd_op_t *cur_op)
 bool osd_messenger_t::try_send(osd_client_t & cl)
 {
     int peer_fd = cl.peer_fd;
-    io_uring_sqe* sqe = ringloop->get_sqe();
-    if (!sqe)
-    {
-        return false;
-    }
-    ring_data_t* data = ((ring_data_t*)sqe->user_data);
     if (!cl.write_op)
     {
         // pick next command
@@ -84,24 +78,27 @@ bool osd_messenger_t::try_send(osd_client_t & cl)
     }
     cl.write_msg.msg_iov = cl.write_op->send_list.get_iovec();
     cl.write_msg.msg_iovlen = cl.write_op->send_list.get_size();
-    data->callback = [this, peer_fd](ring_data_t *data) { handle_send(data->res, peer_fd); };
-    my_uring_prep_sendmsg(sqe, peer_fd, &cl.write_msg, 0);
+    int result = sendmsg(peer_fd, &cl.write_msg, MSG_NOSIGNAL);
+    if (result < 0)
+        result = -errno;
+    {
+        timespec now;
+        clock_gettime(CLOCK_REALTIME, &now);
+        printf("sendmsg done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+    }
+    handle_send(result, peer_fd);
     return true;
 }
 
 void osd_messenger_t::send_replies()
 {
-    for (int i = 0; i < write_ready_clients.size(); i++)
+    while (write_ready_clients.size() > 0)
     {
-        int peer_fd = write_ready_clients[i];
-        if (!try_send(clients[peer_fd]))
-        {
-            write_ready_clients.erase(write_ready_clients.begin(), write_ready_clients.begin() + i);
-            return;
+        auto & cl = clients[write_ready_clients[0]];
+        write_ready_clients.erase(write_ready_clients.begin(), write_ready_clients.begin() + 1);
+        try_send(cl);
     }
 }
-    write_ready_clients.clear();
-}
 
 void osd_messenger_t::handle_send(int result, int peer_fd)
 {

osd.cpp

@@ -241,6 +241,11 @@ void osd_t::set_fd_handler(int fd, std::function<void(int, int)> handler)
 
 void osd_t::handle_epoll_events()
 {
+    {
+        timespec now;
+        clock_gettime(CLOCK_REALTIME, &now);
+        printf("epoll %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+    }
     io_uring_sqe *sqe = ringloop->get_sqe();
     if (!sqe)
     {

osd_primary.cpp

@@ -198,6 +198,7 @@ void osd_t::continue_primary_write(osd_op_t *cur_op)
     else if (op_data->st == 8) goto resume_8;
     else if (op_data->st == 9) goto resume_9;
     assert(op_data->st == 0);
+    printf("primary_write\n");
     if (!check_write_queue(cur_op, pg))
     {
         return;
@@ -389,6 +390,7 @@ void osd_t::continue_primary_sync(osd_op_t *cur_op)
     else if (op_data->st == 5) goto resume_5;
     else if (op_data->st == 6) goto resume_6;
     assert(op_data->st == 0);
+    printf("primary_sync\n");
     if (syncs_in_progress.size() > 0)
     {
         // Wait for previous syncs, if any

ringloop.h

@@ -4,6 +4,8 @@
 #define _LARGEFILE64_SOURCE
 #endif
 
+#include <stdio.h>
+#include <time.h>
 #include <string.h>
 #include <assert.h>
 #include <liburing.h>
@@ -158,7 +160,13 @@ public:
     }
     inline int submit()
     {
-        return io_uring_submit(&ring);
+        int r = io_uring_submit(&ring);
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("submit %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
+        return r;
     }
     inline int wait()
     {