diff --git a/tools/TopoVisual/4_nodes.log.png b/tools/TopoVisual/4_nodes.log.png
new file mode 100644
index 0000000000..45f34bc1dd
Binary files /dev/null and b/tools/TopoVisual/4_nodes.log.png differ
diff --git a/tools/TopoVisual/README.md b/tools/TopoVisual/README.md
new file mode 100644
index 0000000000..5edc251861
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+++ b/tools/TopoVisual/README.md
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+# Topology Visualizer
+Topology Visualizer extracts topology information from RCCL log file and presents graphically. Less than optimal connections between GPUs and nodes are highlighted in red for easy identification.
+
+## Requirements
+Following packages are required to run Topology Visualizer:
+1. gawk
+2. graphviz
+
+## Usage
+Topology Visualizer accepts both RCCL log files or simulator output, i.e. [Topology Explorer](https://github.com/ROCmSoftwarePlatform/rccl/tree/master/tools/topo_expl "Topology Explorer").
+
+RCCL logs needs to be collected with NCCL_DEBUG=INFO and NCCL_DEBUG_SUBSYS=INIT,GRAPH environmental variables. Example command line:
+```shell
+mpirun -np 4 -host rocm-framework-1,rocm-framework-3,rocm-framework-5,rocm-framework-6 \
+  -env HSA_FORCE_FINE_GRAIN_PCIE 1 -env NCCL_DEBUG INFO -env NCCL_DEBUG_SUBSYS INIT,GRAPH \
+  ~/rccl-tests/build/all_reduce_perf -b 8 -e 128M -f 2 -g 8 | tee ~/4_nodes.log
+
+./topo_visual.sh -i 4_nodes.log
+```
+
+## Legend
+
+Solid lines: connections over P2P or shared memory
+
+Dashed lines: connections over network
+
+Green: P2P connections, network connections with GPU RDMA
+
+Red: Connections over shared memory or without GPU RDMA
+
+## Example Output
+![image info](./4_nodes.log.png)
+
+## Copyright
+All source code and accompanying documentation are copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
diff --git a/tools/TopoVisual/extract_topo.awk b/tools/TopoVisual/extract_topo.awk
new file mode 100755
index 0000000000..e7155f8fe6
--- /dev/null
+++ b/tools/TopoVisual/extract_topo.awk
@@ -0,0 +1,172 @@
+#!/usr/bin/gawk -f
+# Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.# Usage:
+
+BEGIN {
+  max_rank=0
+  rings[""]=0
+  max_ring=0
+  treedns[""]=0
+  max_treedn=0
+  conn[""]=0
+  col_start=2
+  col_p1=col_start+1
+  col_p3=col_start+3
+  col_p4=col_start+4
+  col_p5=col_start+5
+  col_p6=col_start+6
+  col_p7=col_start+7
+  col_p8=col_start+8
+}
+
+{
+  if($3=="NCCL" && $4=="INFO" && col_start==2) {
+    col_start=5
+    col_p1=col_start+1
+    col_p3=col_start+3
+    col_p4=col_start+4
+    col_p5=col_start+5
+    col_p6=col_start+6
+    col_p7=col_start+7
+    col_p8=col_start+8
+  }
+
+  if($col_start=="Ring" && $col_p4="->" && $col_p6=="->") {
+    chan=strtonum($col_p1)
+    rank=strtonum($col_p5)
+    next_rank=strtonum($col_p7)
+    rings[rank "," next_rank "," chan]="1"
+    if(chan>max_ring)
+      max_ring=chan
+    if(rank>max_rank)
+      max_rank=rank
+  }
+
+  if($col_start=="Trees") {
+    col_1=col_start+1
+    col_2=col_start+2
+    do {
+      match($col_1, /\[([0-9]+)\]/, ary)
+      chan=strtonum(ary[1])
+      match($col_2, /(\-?[0-9]+)\/(\-?[0-9]+)\/(\-?[0-9]+)\->(\-?[0-9]+)\->(\-?[0-9]+)\|(\-?[0-9]+)\->(\-?[0-9]+)\->(\-?[0-9]+)\/(\-?[0-9]+)\/(\-?[0-9]+)/, ary)
+      if(ary[8]!="-1")
+        treedns[ary[7] "," ary[8] "," chan]="1"
+      if(ary[9]!="-1")
+        treedns[ary[7] "," ary[9] "," chan]="1"
+      if(ary[10]!="-1")
+        treedns[ary[7] "," ary[10] "," chan]="1"
+      if(chan>max_treedn)
+        max_treedn=chan
+      col_1=col_1+2
+      col_2=col_2+2
+    } while ($col_1!="")
+  }
+
+  if($col_p6=="via") {
+    match($col_p1, /([0-9]+)/, ary)
+    chan=strtonum(ary[1])
+    match($col_p3, /([0-9]+)\[.*\]/, ary)
+    s=ary[1]
+    match($col_p5, /([0-9]+)\[.*\]/, ary)
+    d=ary[1]
+    conn[s "," d "," chan]=$col_p7
+  }
+
+  if($col_p6=="[receive]" && $col_p7=="via") {
+    match($col_p1, /([0-9]+)/, ary)
+    chan=strtonum(ary[1])
+    match($col_p3, /([0-9]+)\[.*\]/, ary)
+    s=ary[1]
+    match($col_p5, /([0-9]+)\[.*\]/, ary)
+    d=ary[1]
+    conn[s "," d "," chan]=$col_p8
+  }
+}
+
+END {
+  printf "digraph RCCL {\n"
+  for(r=0;r<max_treedn+1;r++) {
+    printf "  subgraph tree_%d {\n", r
+    for(s=0;s<=max_rank;s++) {
+      for(d=0;d<=max_rank;d++) {
+        if ((s "," d "," r) in treedns) {
+          val=conn[s "," d "," r]
+          style="solid"
+          color="red"
+          if (match(val,"NET")) {
+            style="dashed"
+            if (match(val,"GDRDMA"))
+              color="green"
+          }
+          if (match(val,"P2P")) {
+            color="green"
+          }
+          printf "    t%d_%d -> t%d_%d [label=\"%s\",color=\"%s\",style=\"%s\",fontname=\"Helvetica\"];\n", r, s, r, d, val, color, style
+        }
+      }
+    }
+    printf "\n"
+    for(s=0;s<=max_rank;s++) {
+      printf "    t%d_%d [label=\"%d\",fontsize=\"28\"];\n", r, s, s
+    }
+    printf "  }\n\n"
+  }
+
+  for(r=0;r<max_ring+1;r++) {
+    remove_ring=0
+    for(s=0;s<=max_rank;s++) {
+      for(d=0;d<=max_rank;d++) {
+        if ((s "," d "," r) in rings && !((s "," d "," r) in conn)) {
+          remove_ring=1
+          break;
+        }
+      }
+      if(d<=max_rank)
+        break;
+    }
+    if (remove_ring!=0)
+      continue
+    printf "  subgraph ring_%d {\n", r
+    for(s=0;s<=max_rank;s++) {
+      for(d=0;d<=max_rank;d++) {
+        if ((s "," d "," r) in rings) {
+          val=conn[s "," d "," r]
+          style="solid"
+          color="red"
+          if (match(val,"NET")) {
+            style="dashed"
+            if (match(val,"GDRDMA"))
+              color="green"
+          }
+          if (match(val,"P2P")) {
+            color="green"
+          }
+          printf "    r%d_%d -> r%d_%d [label=\"%s\",color=\"%s\",style=\"%s\",fontname=\"Helvetica\"];\n", r, s, r, d, val, color, style
+        }
+      }
+    }
+    printf "\n"
+    for(s=0;s<=max_rank;s++) {
+      printf "    r%d_%d [label=\"%d\",fontsize=\"28\"];\n", r, s, s
+    }
+    printf "  }\n\n"
+  }
+  printf "}\n"
+}
diff --git a/tools/TopoVisual/topo_visual.sh b/tools/TopoVisual/topo_visual.sh
new file mode 100755
index 0000000000..6b77008c55
--- /dev/null
+++ b/tools/TopoVisual/topo_visual.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+# Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+DIR="$(cd -P "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+exit_error() {
+  echo "Usage: $0 [ -i input_filename ]"
+  exit 1
+}
+
+while getopts ":i:o:" options; do
+  case "${options}" in
+    i)
+      INPUT_NAME=${OPTARG}
+      ;;
+    :)
+      echo "Error: -${OPTARG} requires an argument."
+      exit_error
+      ;;
+    ?)
+      exit_error
+      ;;
+  esac
+done
+
+if [ -z "$INPUT_NAME" ]
+then
+  exit_error
+else
+  $DIR/extract_topo.awk $INPUT_NAME | dot -Tpng -o "$INPUT_NAME.png"
+  echo "Extracted topology from $INPUT_NAME to $INPUT_NAME.png"
+fi
+
+exit 0
diff --git a/tools/scripts/topo_val.sh b/tools/scripts/topo_val.sh
new file mode 100755
index 0000000000..0f97189bd9
--- /dev/null
+++ b/tools/scripts/topo_val.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+# Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+DIR="$(cd -P "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+for i in {0..9}
+do
+	$DIR/../topo_expl/topo_expl -m $i > "topo_m$i.log"
+	$DIR/../TopoVisual/topo_visual.sh -i "topo_m$i.log"
+done