diff --git a/libcxx/utils/ci/buildkite-pipeline.yml b/libcxx/utils/ci/buildkite-pipeline.yml
--- a/libcxx/utils/ci/buildkite-pipeline.yml
+++ b/libcxx/utils/ci/buildkite-pipeline.yml
@@ -16,66 +16,66 @@
 
 steps:
   - label: "C++03"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx03"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx03 | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "C++11"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx11"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx11 | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "C++14"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx14"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx14 | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "C++17"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx17"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx17 | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "C++20"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx2a"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-cxx2a | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "-fno-exceptions"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-noexceptions"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-noexceptions | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "32 bits"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-32bit"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-32bit | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "GCC/C++20"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-gcc"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-gcc | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "ASAN"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-asan"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-asan | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "TSAN"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-tsan"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-tsan | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "UBSAN"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-ubsan"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-ubsan | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "With LLVM's libunwind"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-with_llvm_unwinder"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-with_llvm_unwinder | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
 
   - label: "Single-threaded"
-    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-singlethreaded"
+    command: "set -o pipefail && libcxx/utils/ci/run-buildbot.sh x86_64-ubuntu-singlethreaded | libcxx/utils/ci/phabricator-report"
     agents:
       queue: "libcxx-builders"
diff --git a/libcxx/utils/ci/phabricator-report b/libcxx/utils/ci/phabricator-report
--- a/libcxx/utils/ci/phabricator-report
+++ b/libcxx/utils/ci/phabricator-report
@@ -12,12 +12,31 @@
 import os
 import phabricator
 import re
+import socket
 import subprocess
 import sys
 import time
 
 LLVM_REVIEWS_API = "https://reviews.llvm.org/api/"
 
+def exponentialBackoffRetry(f, exception, maxAttempts=3):
+    """Tries calling a function, but retry with exponential backoff if the
+       function fails with the specified exception.
+    """
+    waitTime = 1
+    attempts = 0
+    while True:
+        try:
+            f()
+            break
+        except exception as e:
+            attempts += 1
+            if attempts == maxAttempts:
+                raise e
+            else:
+                time.sleep(waitTime)
+                waitTime *= 2
+
 def main(argv):
     parser = argparse.ArgumentParser(
         description="""
@@ -78,7 +97,10 @@
 
     token = os.environ['CONDUIT_TOKEN']
     phab = phabricator.Phabricator(token=token, host=LLVM_REVIEWS_API)
-    phab.harbormaster.sendmessage(buildTargetPHID=phabricatorID, type=result, unit=[resultObject])
+    exponentialBackoffRetry(
+        lambda: phab.harbormaster.sendmessage(buildTargetPHID=phabricatorID, type=result, unit=[resultObject]),
+        exception=socket.timeout
+    )
 
 if __name__ == '__main__':
     main(sys.argv[1:])
diff --git a/libcxx/utils/ci/run-buildbot.sh b/libcxx/utils/ci/run-buildbot.sh
--- a/libcxx/utils/ci/run-buildbot.sh
+++ b/libcxx/utils/ci/run-buildbot.sh
@@ -121,5 +121,5 @@
 echo "+++ Running the libc++abi tests"
 ninja -C "${BUILD_DIR}" check-cxxabi
 
-echo "+++ Running the libc++ benchmarks"
-ninja -C "${BUILD_DIR}" check-cxx-benchmarks
+# echo "+++ Running the libc++ benchmarks"
+# ninja -C "${BUILD_DIR}" check-cxx-benchmarks