diff --git a/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp b/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
--- a/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
+++ b/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
@@ -209,7 +209,8 @@
     ssize_t BytesWritten = sendmsg(SocketFD, &Message, 0);
 
     if (BytesWritten < 0)
-      return make_error<Failure>("Failed to write FD to socket");
+      return make_error<Failure>("Failed to write FD to socket: " +
+                                 Twine(strerror(errno)));
 
     return Error::success();
   }
@@ -224,7 +225,8 @@
     ssize_t BytesRead = recvmsg(SocketFD, &Message, 0);
 
     if (BytesRead < 0)
-      return make_error<Failure>("Failed to read FD from socket");
+      return make_error<Failure>("Failed to read FD from socket: " +
+                                 Twine(strerror(errno)));
 
     struct cmsghdr *ControlMessage = CMSG_FIRSTHDR(&Message);
 
@@ -246,7 +248,8 @@
     if (PipeSuccessOrErr != 0) {
       return make_error<Failure>(
           "Failed to create a pipe for interprocess communication between "
-          "llvm-exegesis and the benchmarking subprocess");
+          "llvm-exegesis and the benchmarking subprocess: " +
+          Twine(strerror(errno)));
     }
 
     SubprocessMemory SPMemory;