Improve "show segment-manager segments"

Clean up private-segment fifo preallocation

Change-Id: I53c630ed81d48f2832a204992d73635536926983
Signed-off-by: Dave Barach <dave@barachs.net>

6 files changed, 176 insertions, 29 deletions

diff --git a/src/svm/svm_fifo_segment.c b/src/svm/svm_fifo_segment.c
index 97d9976b39e..3bdd2b28ebb 100644
--- a/src/svm/svm_fifo_segment.c
+++ b/src/svm/svm_fifo_segment.c
@@ -221,13 +221,13 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a)
   u8 **heaps = 0;
   mheap_t *heap_header;
   int segment_count = 1;
+  u32 rnd_size = 0;
   int i;
 
   if (a->private_segment_count && a->private_segment_size)
     {
       u8 *heap;
       u32 pagesize = clib_mem_get_page_size ();
-      u32 rnd_size;
       rnd_size = (a->private_segment_size + (pagesize - 1)) & ~pagesize;
 
       for (i = 0; i < a->private_segment_count; i++)
@@ -246,7 +246,8 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a)
     }
 
   /* Spread preallocated fifo pairs across segments */
-  a->preallocated_fifo_pairs /= segment_count;
+  a->preallocated_fifo_pairs =
+    (a->preallocated_fifo_pairs + segment_count - 1) / segment_count;
 
   /* Allocate segments */
   for (i = 0; i < segment_count; i++)
@@ -254,7 +255,7 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a)
       pool_get (sm->segments, s);
       memset (s, 0, sizeof (*s));
 
-      s->ssvm.ssvm_size = ~0;
+      s->ssvm.ssvm_size = rnd_size;
       s->ssvm.i_am_master = 1;
       s->ssvm.my_pid = getpid ();
       s->ssvm.name = format (0, "%s%c", a->segment_name, 0);
@@ -536,6 +537,100 @@ svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment)
   return fifo_segment->h->n_active_fifos;
 }
 
+u32
+svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t * fifo_segment,
+				 u32 fifo_size_in_bytes)
+{
+  ssvm_shared_header_t *sh;
+  svm_fifo_segment_header_t *fsh;
+  svm_fifo_t *f;
+  int i;
+  u32 count = 0, rounded_data_size, freelist_index;
+
+  sh = fifo_segment->ssvm.sh;
+  fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+  /* Count all free fifos? */
+  if (fifo_size_in_bytes == ~0)
+    {
+      for (i = 0; i < vec_len (fsh->free_fifos); i++)
+	{
+	  f = fsh->free_fifos[i];
+	  if (f == 0)
+	    continue;
+
+	  while (f)
+	    {
+	      f = f->next;
+	      count++;
+	    }
+	}
+      return count;
+    }
+
+  rounded_data_size = (1 << (max_log2 (fifo_size_in_bytes)));
+  freelist_index = max_log2 (rounded_data_size)
+    - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
+
+  if (freelist_index > vec_len (fsh->free_fifos))
+    return 0;
+
+  f = fsh->free_fifos[freelist_index];
+  if (f == 0)
+    return 0;
+
+  while (f)
+    {
+      f = f->next;
+      count++;
+    }
+  return count;
+}
+
+/**
+ * Segment format function
+ */
+u8 *
+format_svm_fifo_segment (u8 * s, va_list * args)
+{
+  svm_fifo_segment_private_t *sp
+    = va_arg (*args, svm_fifo_segment_private_t *);
+  int verbose = va_arg (*args, int);
+  ssvm_shared_header_t *sh;
+  svm_fifo_segment_header_t *fsh;
+  svm_fifo_t *f;
+  int i;
+  u32 count;
+  uword indent = format_get_indent (s) + 2;
+
+  sh = sp->ssvm.sh;
+  fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+  s = format (s, "%USegment Heap: %U\n", format_white_space, indent,
+	      format_mheap, sh->heap, verbose);
+  s = format (s, "%U segment has %u active fifos\n",
+	      format_white_space, indent, svm_fifo_segment_num_fifos (sp));
+
+  for (i = 0; i < vec_len (fsh->free_fifos); i++)
+    {
+      f = fsh->free_fifos[i];
+      if (f == 0)
+	continue;
+      count = 0;
+      while (f)
+	{
+	  f = f->next;
+	  count++;
+	}
+
+      s = format (s, "%U%-5u Kb: %u free",
+		  format_white_space, indent + 2,
+		  1 << (i + max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE) - 10),
+		  count);
+    }
+  return s;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *
diff --git a/src/svm/svm_fifo_segment.h b/src/svm/svm_fifo_segment.h
index 5cc4754a0a0..7c97e9b489f 100644
--- a/src/svm/svm_fifo_segment.h
+++ b/src/svm/svm_fifo_segment.h
@@ -118,7 +118,11 @@ void svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s,
 void svm_fifo_segment_init (u64 baseva, u32 timeout_in_seconds);
 u32 svm_fifo_segment_index (svm_fifo_segment_private_t * s);
 u32 svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment);
+u32 svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t *
+				     fifo_segment, u32 fifo_size_in_bytes);
+
 svm_fifo_segment_private_t *svm_fifo_segment_segments_pool (void);
+format_function_t format_svm_fifo_segment;
 
 #endif /* __included_ssvm_fifo_segment_h__ */
 
diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c
index 7cf66ee35b2..c23e4c0237c 100644
--- a/src/vnet/session/segment_manager.c
+++ b/src/vnet/session/segment_manager.c
@@ -74,6 +74,11 @@ session_manager_add_segment_i (segment_manager_t * sm, u32 segment_size,
     }
   else
     {
+      u32 rx_fifo_size, tx_fifo_size, rx_rounded_data_size,
+	tx_rounded_data_size;
+      u32 approx_segment_count;
+      u64 approx_total_size;
+
       ca->segment_name = "process-private-segment";
       ca->segment_size = ~0;
       ca->rx_fifo_size = sm->properties->rx_fifo_size;
@@ -82,6 +87,36 @@ session_manager_add_segment_i (segment_manager_t * sm, u32 segment_size,
       ca->private_segment_count = sm->properties->private_segment_count;
       ca->private_segment_size = sm->properties->private_segment_size;
 
+      /* Default to a small private segment */
+      if (ca->private_segment_size == 0)
+	ca->private_segment_size = 128 << 20;
+
+      /* Calculate space requirements */
+      rx_rounded_data_size = (1 << (max_log2 (ca->rx_fifo_size)));
+      tx_rounded_data_size = (1 << (max_log2 (ca->tx_fifo_size)));
+
+      rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
+      tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
+
+      approx_total_size = (u64) ca->preallocated_fifo_pairs
+	* (rx_fifo_size + tx_fifo_size);
+      approx_segment_count =
+	(approx_total_size +
+	 (ca->private_segment_size - 1)) / (u64) ca->private_segment_size;
+
+      /* The user asked us to figure it out... */
+      if (ca->private_segment_count == 0)
+	{
+	  ca->private_segment_count = approx_segment_count;
+	}
+      /* Follow directions, but issue a warning */
+      else if (approx_segment_count != ca->private_segment_count)
+	{
+	  clib_warning
+	    ("Honoring segment count %u, but calculated count was %u",
+	     ca->private_segment_count, approx_segment_count);
+	}
+
       if (svm_fifo_segment_create_process_private (ca))
 	clib_warning ("Failed to create process private segment");
 
@@ -503,7 +538,9 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
   u8 show_segments = 0, verbose = 0, *name;
   uword address;
   u64 size;
-  u32 fifos;
+  u32 active_fifos;
+  u32 free_fifos;
+
   mheap_t *heap_header;
 
   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
@@ -536,8 +573,8 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
       segments = svm_fifo_segment_segments_pool ();
       vlib_cli_output (vm, "%d svm fifo segments allocated",
 		       pool_elts (segments));
-      vlib_cli_output (vm, "%-20s%=12s%=12s%=15s", "Name", "Size (M)",
-		       "Fifos", "Address");
+      vlib_cli_output (vm, "%-20s%=12s%=16s%=16s%=16s", "Name",
+		       "HeapSize (M)", "ActiveFifos", "FreeFifos", "Address");
 
       /* *INDENT-OFF* */
       pool_foreach (seg, segments, ({
@@ -557,9 +594,14 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
 	    size = seg->ssvm.ssvm_size;
 	    name = seg->ssvm.sh->name;
 	  }
-	fifos = svm_fifo_segment_num_fifos (seg);
-	vlib_cli_output (vm, "%-20s%=12u%=12u%=15x", name, size << 20, fifos,
+	active_fifos = svm_fifo_segment_num_fifos (seg);
+        free_fifos = svm_fifo_segment_num_free_fifos (seg, ~0 /* size */);
+	vlib_cli_output (vm, "%-20v%=16llu%=16u%=16u%16llx",
+                         name, size >> 20ULL, active_fifos, free_fifos,
 			 address);
+        if (verbose)
+          vlib_cli_output (vm, "%U",
+                           format_svm_fifo_segment, seg, verbose);
 	if (seg->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
 	  vec_free (name);
       }));
@@ -573,7 +615,7 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
 {
   .path = "show segment-manager",
-  .short_help = "show segment-manager [segments]",
+  .short_help = "show segment-manager [segments][verbose]",
   .function = segment_manager_show_fn,
 };
 /* *INDENT-ON* */
diff --git a/src/vnet/tcp/builtin_client.c b/src/vnet/tcp/builtin_client.c
index 44b1f70e9df..94e6b4ae5d8 100644
--- a/src/vnet/tcp/builtin_client.c
+++ b/src/vnet/tcp/builtin_client.c
@@ -563,12 +563,14 @@ test_tcp_clients_command_fn (vlib_main_t * vm,
       else if (unformat (input, "private-segment-count %d",
 			 &tm->private_segment_count))
 	;
-      else if (unformat (input, "private-segment-size %dm", &tmp))
-	tm->private_segment_size = tmp << 20;
-      else if (unformat (input, "private-segment-size %dg", &tmp))
-	tm->private_segment_size = tmp << 30;
-      else if (unformat (input, "private-segment-size %d", &tmp))
-	tm->private_segment_size = tmp;
+      else if (unformat (input, "private-segment-size %U",
+			 unformat_memory_size, &tmp))
+	{
+	  if (tmp >= 0x100000000ULL)
+	    return clib_error_return
+	      (0, "private segment size %lld (%llu) too large", tmp, tmp);
+	  tm->private_segment_size = tmp;
+	}
       else if (unformat (input, "preallocate-fifos"))
 	tm->prealloc_fifos = 1;
       else if (unformat (input, "preallocate-sessions"))
diff --git a/src/vnet/tcp/builtin_proxy.c b/src/vnet/tcp/builtin_proxy.c
index d8cfb11d315..91377e76726 100644
--- a/src/vnet/tcp/builtin_proxy.c
+++ b/src/vnet/tcp/builtin_proxy.c
@@ -523,7 +523,7 @@ proxy_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
 {
   builtin_proxy_main_t *bpm = &builtin_proxy_main;
   int rv;
-  u32 tmp;
+  u64 tmp;
 
   bpm->fifo_size = 64 << 10;
   bpm->rcv_buffer_size = 1024;
@@ -542,12 +542,14 @@ proxy_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
       else if (unformat (input, "private-segment-count %d",
 			 &bpm->private_segment_count))
 	;
-      else if (unformat (input, "private-segment-size %dm", &tmp))
-	bpm->private_segment_size = tmp << 20;
-      else if (unformat (input, "private-segment-size %dg", &tmp))
-	bpm->private_segment_size = tmp << 30;
-      else if (unformat (input, "private-segment-size %d", &tmp))
-	bpm->private_segment_size = tmp;
+      else if (unformat (input, "private-segment-size %U",
+			 unformat_memory_size, &tmp))
+	{
+	  if (tmp >= 0x100000000ULL)
+	    return clib_error_return
+	      (0, "private segment size %lld (%llu) too large", tmp, tmp);
+	  bpm->private_segment_size = tmp;
+	}
       else
 	return clib_error_return (0, "unknown input `%U'",
 				  format_unformat_error, input);
diff --git a/src/vnet/tcp/builtin_server.c b/src/vnet/tcp/builtin_server.c
index 295c189d869..93314529973 100644
--- a/src/vnet/tcp/builtin_server.c
+++ b/src/vnet/tcp/builtin_server.c
@@ -369,7 +369,7 @@ server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
   builtin_server_main_t *bsm = &builtin_server_main;
   u8 server_uri_set = 0;
   int rv;
-  u32 tmp;
+  u64 tmp;
 
   bsm->no_echo = 0;
   bsm->fifo_size = 64 << 10;
@@ -392,12 +392,14 @@ server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
       else if (unformat (input, "private-segment-count %d",
 			 &bsm->private_segment_count))
 	;
-      else if (unformat (input, "private-segment-size %dm", &tmp))
-	bsm->private_segment_size = tmp << 20;
-      else if (unformat (input, "private-segment-size %dg", &tmp))
-	bsm->private_segment_size = tmp << 30;
-      else if (unformat (input, "private-segment-size %d", &tmp))
-	bsm->private_segment_size = tmp;
+      else if (unformat (input, "private-segment-size %U",
+			 unformat_memory_size, &tmp))
+	{
+	  if (tmp >= 0x100000000ULL)
+	    return clib_error_return
+	      (0, "private segment size %lld (%llu) too large", tmp, tmp);
+	  bsm->private_segment_size = tmp;
+	}
       else if (unformat (input, "uri %s", &bsm->server_uri))
 	server_uri_set = 1;
       else