Changes between Version 27 and Version 28 of CreditNew

Timestamp:

Mar 25, 2010, 2:59:34 PM (15 years ago)

Author:

davea

Comment:

--

CreditNew

@@ -114 +114 @@
 Notes:
 
+ * PFC(J) is not cheat-proof; e.g. cheaters can falsify elapsed time.
  * We use elapsed time instead of actual device time (e.g., CPU time).
    If a job uses a resource inefficiently
@@ -143 +144 @@
 and we'll denote it E(J).
 
-''A posteriori'' estimates of job size may exist also
-(e.g., an iteration count reported by the app)
-but this introduces a new cheating risk.
+(''A posteriori'' estimates of job size may exist also,
+e.g., an iteration count reported by the app,
+but aren't cheat-proof; we don't use them.)
 
 == Cross-version normalization ==
@@ -273 +274 @@
 == Anonymous platform ==
 
-For anonymous platform apps, since we don't reliably
-know anything about the devices involved,
+For anonymous platform apps,
+since we don't reliably know anything about the devices involved,
 we don't try to estimate PFC.
 
-For each app, we maintain claimed_credit^mean^(A),
-the average of claimed_credit(J)/E(J).
+For each app, we maintain min_avg_pfc(A),
+the average PFC for the most efficient version of A.
 
 The claimed credit for anonymous platform jobs is
@@ -286 +287 @@
 The server maintains host_app_version records for anonymous platform,
 and it keeps track of elapsed time statistics there.
-These have app_version_id = -1 for CPU, -2 for NVIDIA GPU, -3 for ATI.
+These have app_version_id = -2 for CPU, -3 for NVIDIA GPU, -4 for ATI.
 
 == Replication ==