Change Details

Create ATTR_CONTIGUOUS mappings in pmap_enter_object(). On a Cortex A72-based EC2 a1.4xlarge VM, the make -j16 buildworld times for a -NODEBUG kernel and MALLOC_PRODUCTION user-space drop from 101 minutes to 94 minutes. The read-only data and text sections of large (2 MB+) executables, e.g., clang, are being mapped using 64 KB pages. I do, however, want to point out that a good portion of the reduction is buildworld time is coming from performing a smaller number of icache flushes when creating executable mappings. Also included is a BTI-related bug fix to pmap_enter_l2().

Create ATTR_CONTIGUOUS mappings in pmap_enter_object(). On a Cortex A72-based EC2 a1.4xlarge VM, the make -j16 buildworld times for a -NODEBUG kernel and MALLOC_PRODUCTION user-space drop from 101 minutes to 94 minutes. The read-only data and text sections of large (2 MB+) executables, e.g., clang, are being mapped using 64 KB pages. I do, however, want to point out that a good portion of the reduction in buildworld time is coming from performing a smaller number of icache flushes when creating executable mappings. Also included is a BTI-related bug fix to pmap_enter_l2().

Create ATTR_CONTIGUOUS mappings in pmap_enter_object(). On a Cortex A72-based EC2 a1.4xlarge VM, the make -j16 buildworld times for a -NODEBUG kernel and MALLOC_PRODUCTION user-space drop from 101 minutes to 94 minutes. The read-only data and text sections of large (2 MB+) executables, e.g., clang, are being mapped using 64 KB pages. I do, however, want to point out that a good portion of the reduction isin buildworld time is coming from performing a smaller number of icache flushes when creating executable mappings. Also included is a BTI-related bug fix to pmap_enter_l2().