Patent
1994-09-16
1996-11-12
Lane, Jack A.
395406, G06F 1210
Patent
active
055748783
ABSTRACT:
A method fr purging a translation lookaside buffer purges only those entries required to be purged in order to eliminate overhead incurring degradation in the use efficiency of the translation lookaside buffer. The buffer is employed in a virtual machine system containing a plurality of levels of virtual machines and at least one register for storing virtual machine identification codes. Upon execution of an instruction, which is issued by a particular one of the virtual machines and which is accompanied by a purge of the translation lookaside buffer, the virtual machine identification code of the particular virtual machine and a virtual machine identification code of another virtual machine having a translation lookaside buffer entry to be purged are stored in the register. When the instruction is executed, the entry storing the virtual machine identification code which coincides with that of the particular virtual machine is purged, while the entry storing the virtual machine identification code which coincides with that of the other virtual machine is purged in parallel.
REFERENCES:
patent: 4068303 (1978-01-01), Morita
patent: 4733348 (1988-03-01), Hiraoka et al.
Amano Hideaki
Kobayashi Yuji
Onodera Osamu
Uehara Ken
Hitachi , Ltd.
Lane Jack A.
Verbrugge Kevin
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