(19)
(11) EP 1 141 838 A1

(12)

(43) Date of publication:
10.10.2001 Bulletin 2001/41

(21) Application number: 99944008.4

(22) Date of filing: 26.08.1999
(51) International Patent Classification (IPC)7: G06F 12/08
(86) International application number:
PCT/US9919/856
(87) International publication number:
WO 0038/070 (29.06.2000 Gazette 2000/26)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 21.12.1998 US 217699
21.12.1998 US 217212
21.12.1998 US 217649
10.08.1999 US 370970

(71) Applicant: ADVANCED MICRO DEVICES INC.
Sunnyvale,California 94088-3453 (US)

(72) Inventor:
  • KELLER, James, B.
    Palo Alto, CA 94303 (US)

(74) Representative: Sanders, Peter Colin Christopher (GB) 
Brookes Batchellor102-108 Clerkenwell Road
London EC1M 5SA
London EC1M 5SA (GB)

   


(54) CONSERVATION OF SYSTEM MEMORY BANDWIDTH AND CACHE COHERENCY MAINTENANCE USING MEMORY CANCEL MESSAGES