A B777 CAPT RPTS LNDG WITH LOWER THAN NORMAL PLANNED FUEL. BELIEVED DUE TO DEP CTL AND CTR KEEPING FLT LOWER THAN NORMAL AND SPD RESTRICTED.

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BOTH DEP CTL AND CTR KEEP US LOWER THAN NORMAL AND RESTR TO 250 KTS. WE FINALLY GOT TO CRUISE ALT AT ZZZ1. AFTER INPUTTING WINDS INTO FMC; WE GENERATED AN INSUFFICIENT FUEL MESSAGE; WHICH GOT WORSE AS TIME WENT ALONG. COMPLETED THE IRREGULAR FUEL CHKLIST; AND CHKED ALL SYS INCLUDING FUEL SYS. ALL SEEMED NORMAL. ACTUAL WINDS WERE AS FORECASTED. FUEL FLOW PER ENG APPEARED NORMAL; AS DID LATERAL BAL OF THE FUEL. TRIM WAS 0.8 R; WHICH WAS NOT OUT OF THE ORDINARY. CALCULATED AND INDICATED FUEL NUMBERS MATCHED WITHIN A FEW HUNDRED LBS. THE ARR FUEL STARTED DIMINISHING AT THE RATE OF ABOUT 100 LBS EVERY 2.5 MINS TO THE POINT WHERE IT CALCULATED US TO LAND WITH 9.3 LBS VERSUS THE 13.3 LBS ON THE FLT PLAN. CALLED DISPATCH WHO INFORMED MAINT CTL OF THE SITUATION. DISPATCH REQUESTED NO UNDUE DELAY HANDLING AT ZZZ2 TO WHICH WE AGREED. FUEL AT THAT POINT WAS INDICATING 9.3 FOR LNDG...WE PROBABLY HAD ABOUT 11.4 BY THE TIME WE REACHED APCH FIX FOR RWY 26 AT ZZZ2. FAA ASKED US IF WE HAD LOW FUEL (WHICH DISPATCH MUST HAVE TOLD) AND IF WE NEEDED EXPEDITIOUS HANDLING. WE SAID THAT WE WANTED NO UNDUE DELAY. DISPATCH SUGGESTED A FUEL STOP IN ZZZ3 OR ZZZ4 IF THE SIT GOT WORSE. WE FELT THAT WE HAD ENOUGH TO KEEP GOING YET WOULD BE LNDG LOWER THAN WE NORMALLY LAND. WE SHOULD HAVE HAD SOMEWHAT LESS FUEL DUE TO ALL THE LOW AND SLOW VECTORING YET AT ALT THERE WAS NO KNOWN REASON FOR THE PROJECTION OF ARR FUEL TO CONTINUE DECREASING SIGNIFICANTLY FROM THE FLT PLAN FORECAST. STANDARD PROC AT ZZZ2 TRACON IS TO CALL OUT EQUIP; SO WE GUESS THAT MUST HAVE BEEN AS AN AMBER ALERT. CFR MET THE ACFT UPON ARR AT THE GATE AND DETERMINED THAT THERE WAS NO FUEL LEAK.