diff --git a/src/future/Future.php b/src/future/Future.php
--- a/src/future/Future.php
+++ b/src/future/Future.php
@@ -13,6 +13,7 @@
   private $result;
   private $exception;
   private $futureKey;
+  private $serviceProfilerCallID;
 
   /**
    * Is this future's process complete? Specifically, can this future be
@@ -60,6 +61,7 @@
     }
     $this->hasStarted = true;
 
+    $this->startServiceProfiler();
     $this->isReady();
   }
 
@@ -96,8 +98,49 @@
           'than once.'));
     }
     $this->hasEnded = true;
+
+    $this->endServiceProfiler();
+  }
+
+  private function startServiceProfiler() {
+
+    // NOTE: This is a soft dependency so that we don't need to build the
+    // ServiceProfiler into the Phage agent. Normally, this class is always
+    // available.
+
+    if (!class_exists('PhutilServiceProfiler')) {
+      return;
+    }
+
+    $params = $this->getServiceProfilerStartParameters();
+
+    $profiler = PhutilServiceProfiler::getInstance();
+    $call_id = $profiler->beginServiceCall($params);
+
+    $this->serviceProfilerCallID = $call_id;
   }
 
+  private function endServiceProfiler() {
+    $call_id = $this->serviceProfilerCallID;
+    if ($call_id === null) {
+      return;
+    }
+
+    $params = $this->getServiceProfilerResultParameters();
+
+    $profiler = PhutilServiceProfiler::getInstance();
+    $profiler->endServiceCall($call_id, $params);
+  }
+
+  protected function getServiceProfilerStartParameters() {
+    return array();
+  }
+
+  protected function getServiceProfilerResultParameters() {
+    return array();
+  }
+
+
   /**
    * Retrieve a list of sockets which we can wait to become readable while
    * a future is resolving. If your future has sockets which can be
diff --git a/src/future/FutureProxy.php b/src/future/FutureProxy.php
--- a/src/future/FutureProxy.php
+++ b/src/future/FutureProxy.php
@@ -63,6 +63,14 @@
     return $this;
   }
 
+  protected function getServiceProfilerStartParameters() {
+    return $this->getProxiedFuture()->getServiceProfilerStartParameters();
+  }
+
+  protected function getServiceProfilerResultParameters() {
+    return $this->getProxiedFuture()->getServiceProfilerResultParameters();
+  }
+
   abstract protected function didReceiveResult($result);
 
 }
diff --git a/src/future/exec/ExecFuture.php b/src/future/exec/ExecFuture.php
--- a/src/future/exec/ExecFuture.php
+++ b/src/future/exec/ExecFuture.php
@@ -530,24 +530,13 @@
    * @task internal
    */
   public function isReady() {
-    // NOTE: We have soft dependencies on PhutilServiceProfiler and
-    // PhutilErrorTrap here. These dependencies are soft to avoid the need to
-    // build them into the Phage agent. Under normal circumstances, these
-    // classes are always available.
+    // NOTE: We have a soft dependencies on PhutilErrorTrap here, to avoid
+    // the need to build it into the Phage agent. Under normal circumstances,
+    // this class are always available.
 
     if (!$this->pipes) {
       $is_windows = phutil_is_windows();
 
-      // NOTE: See note above about Phage.
-      if (class_exists('PhutilServiceProfiler')) {
-        $profiler = PhutilServiceProfiler::getInstance();
-        $this->profilerCallID = $profiler->beginServiceCall(
-          array(
-            'type'    => 'exec',
-            'command' => phutil_string_cast($this->getCommand()),
-          ));
-      }
-
       if (!$this->start) {
         // We might already have started the timer via initiating resolution.
         $this->start = microtime(true);
@@ -843,23 +832,6 @@
 
     unset($this->windowsStdoutTempFile);
     unset($this->windowsStderrTempFile);
-
-    if ($this->profilerCallID !== null) {
-      if ($this->hasResult()) {
-        $result = $this->getResult();
-        $err = idx($result, 0);
-      } else {
-        $err = null;
-      }
-
-      $profiler = PhutilServiceProfiler::getInstance();
-      $profiler->endServiceCall(
-        $this->profilerCallID,
-        array(
-          'err' => $err,
-        ));
-      $this->profilerCallID = null;
-    }
   }
 
 
@@ -958,4 +930,25 @@
     }
   }
 
+  protected function getServiceProfilerStartParameters() {
+    return array(
+      'type' => 'exec',
+      'command' => phutil_string_cast($this->getCommand()),
+    );
+  }
+
+  protected function getServiceProfilerResultParameters() {
+    if ($this->hasResult()) {
+      $result = $this->getResult();
+      $err = idx($result, 0);
+    } else {
+      $err = null;
+    }
+
+    return array(
+      'err' => $err,
+    );
+  }
+
+
 }
diff --git a/src/future/exec/PhutilExecPassthru.php b/src/future/exec/PhutilExecPassthru.php
--- a/src/future/exec/PhutilExecPassthru.php
+++ b/src/future/exec/PhutilExecPassthru.php
@@ -34,14 +34,6 @@
   public function execute() {
     $command = $this->getCommand();
 
-    $profiler = PhutilServiceProfiler::getInstance();
-    $call_id = $profiler->beginServiceCall(
-      array(
-        'type'    => 'exec',
-        'subtype' => 'passthru',
-        'command' => $command,
-      ));
-
     $spec  = array(STDIN, STDOUT, STDERR);
     $pipes = array();
 
@@ -85,12 +77,6 @@
 
     $err = proc_close($proc);
 
-    $profiler->endServiceCall(
-      $call_id,
-      array(
-        'err' => $err,
-      ));
-
     return $err;
   }
 
@@ -111,4 +97,26 @@
     return true;
   }
 
+
+
+  protected function getServiceProfilerStartParameters() {
+    return array(
+      'type' => 'exec',
+      'subtype' => 'passthru',
+      'command' => phutil_string_cast($this->getCommand()),
+    );
+  }
+
+  protected function getServiceProfilerResultParameters() {
+    if ($this->hasResult()) {
+      $err = $this->getResult();
+    } else {
+      $err = null;
+    }
+
+    return array(
+      'err' => $err,
+    );
+  }
+
 }
diff --git a/src/future/http/HTTPFuture.php b/src/future/http/HTTPFuture.php
--- a/src/future/http/HTTPFuture.php
+++ b/src/future/http/HTTPFuture.php
@@ -123,13 +123,6 @@
       if (!$this->socket) {
         return $this->stateReady;
       }
-
-      $profiler = PhutilServiceProfiler::getInstance();
-      $this->profilerCallID = $profiler->beginServiceCall(
-        array(
-          'type' => 'http',
-          'uri' => $this->getURI(),
-        ));
     }
 
     if (!$this->stateConnected) {
@@ -225,9 +218,6 @@
       $this->setResult($this->parseRawHTTPResponse($this->response));
     }
 
-    $profiler = PhutilServiceProfiler::getInstance();
-    $profiler->endServiceCall($this->profilerCallID, array());
-
     return true;
   }
 
@@ -303,4 +293,11 @@
       $data;
   }
 
+  protected function getServiceProfilerStartParameters() {
+    return array(
+      'type' => 'http',
+      'uri' => phutil_string_cast($this->getURI()),
+    );
+  }
+
 }
diff --git a/src/future/http/HTTPSFuture.php b/src/future/http/HTTPSFuture.php
--- a/src/future/http/HTTPSFuture.php
+++ b/src/future/http/HTTPSFuture.php
@@ -211,13 +211,9 @@
       $uri_object = new PhutilURI($uri);
       $proxy = PhutilHTTPEngineExtension::buildHTTPProxyURI($uri_object);
 
-      $profiler = PhutilServiceProfiler::getInstance();
-      $this->profilerCallID = $profiler->beginServiceCall(
-        array(
-          'type' => 'http',
-          'uri' => $uri,
-          'proxy' => (string)$proxy,
-        ));
+      // TODO: Currently, the "proxy" is not passed to the ServiceProfiler
+      // because of changes to how ServiceProfiler is integrated. It would
+      // be nice to pass it again.
 
       if (!self::$multi) {
         self::$multi = curl_multi_init();
@@ -526,9 +522,6 @@
       }
     }
 
-    $profiler = PhutilServiceProfiler::getInstance();
-    $profiler->endServiceCall($this->profilerCallID, array());
-
     return true;
   }
 
@@ -821,4 +814,11 @@
    return ($this->downloadPath !== null);
   }
 
+  protected function getServiceProfilerStartParameters() {
+    return array(
+      'type' => 'http',
+      'uri' => phutil_string_cast($this->getURI()),
+    );
+  }
+
 }