The following Ehcache config files contains the following cache names :
./portal-impl/src/ehcache/liferay-multi-vm.xml: name="com.liferay.portal.spring.hibernate.FinderCache"
./portal-impl/src/ehcache/liferay-multi-vm-clustered.xml: name="com.liferay.portal.spring.hibernate.FinderCache"

But I think the correct cache name for the "hibernate / orm cache", is "com.liferay.portal.kernel.dao.orm.FinderCache"
./portal-impl/src/com/liferay/portal/dao/orm/hibernate/FinderCacheImpl.java: public static final String CACHE_NAME = FinderCache.class.getName();
and
./portal-kernel/src/com/liferay/portal/kernel/dao/orm/FinderCache.java

You can get more details by reading the bottom of the following article : http://www.kanonbra.com/index.php/projects/performance-testing/18-using-visualvm-on-liferay