The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2013
Filed:
Jan. 14, 2011
Fredrik Ohrstrom, Stockholm, SE;
Mikael Vidstedt, Solna, SE;
Fredrik Ohrstrom, Stockholm, SE;
Mikael Vidstedt, Solna, SE;
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A system and method for locking memory areas in a Java Virtual Machines (JVM) to facilitate sharing between virtual servers. In accordance with an embodiment, the system comprises a computing/virtual execution environment, which includes one or more physical computers, computer systems, server computers, or similar computing devices, a hypervisor, and a virtual machine or JVM. The JVM allows one or more application images to be run on the computer, wherein the application images can include application server instances. The application server uses a first large page in memory during its startup process, and is configured so that it signals to the JVM when the application server has completed its startup and has potentially pre-optimized important code. When the JVM receives this signal, it internally write-protects or locks the page used for application server code memory, so that any new JITed code or re-optimized code is subsequently written into a new large page. The original page will therefore be undisturbed and will always be shareable between the virtual servers running within the hypervisor.