[PATCH v2] dix: Provide means to determine server startup time easily.

[Rami Ylimäki]

It is useful to provide a way to determine server initialization time
for testers. For example, this patch makes it easy for testers to
verify that the recent xkbcomp modifications have a positive effect on
server startup time on boot.

Signed-off-by: Rami Ylimäki <rami.ylimaki at vincit.fi>
---
v2: The time variables are no more global because they are currently
used only in a single function inside X server. LogMessage is still
used instead of DebugF. I want the startup time information be
available also on release builds so that in principle it would be
possible to follow startup time development over time from saved logs.

It's also possible to measure the startup time from a parent process
by following the signals that X server is sending in
NotifyParentProcess. However, in practise it would be nice to have
this information in the server log as well.

 dix/main.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/dix/main.c b/dix/main.c
index 5c46dc1..1b287ba 100644
--- a/dix/main.c
+++ b/dix/main.c
@@ -136,6 +136,10 @@ int main(int argc, char *argv[], char *envp[])
 {
     int		i;
     HWEventQueueType	alwaysCheckForInput[2];
+    /* when X server started initializing itself */
+    CARD32 ServerStartTime = GetTimeInMillis();
+    /* when X server was ready to handle clients */
+    CARD32 ServerReadyTime = ServerStartTime;
 
     display = "0";
 
@@ -284,6 +288,12 @@ int main(int argc, char *argv[], char *envp[])
     pthread_mutex_unlock(&serverInitCompleteMutex);
 #endif
         
+	ServerReadyTime = GetTimeInMillis();
+	LogMessage(X_INFO, "Server initialized in %lu.%.3lu seconds (%lu.%.3lu -> %lu.%.3lu)\n",
+	           (ServerReadyTime - ServerStartTime) / 1000, (ServerReadyTime - ServerStartTime) % 1000,
+	           ServerStartTime / 1000, ServerStartTime % 1000,
+	           ServerReadyTime / 1000, ServerReadyTime % 1000);
+
 	NotifyParentProcess();
 
 	Dispatch();
-- 
1.6.3.3