This linux kernel module was created as part of the course Topics in Operating Systems (CS730A) Spring Semester - 2019, instructed by Prof. Debadatta Mishra.
A linux kernel module to count number of TLB misses encountered during program execution. The module is also extended to handle Page Table Isolation (a Meltdown-attack mitigation) and count the number of unused, read-only and written pages. The base code (fault_hook.patch) was provided.
- Patch your kernel with
fault_hook.patch.
cd module && make # build the module sudo insmod memtrack.ko #insert the module into the kernel- The module has the following sysfs variables (/sys/kernel/memtrack):
- command:
0to count TLB misses w/o PTI.1to count TLB misses w PTI.2to count read-only, unused and write pages. - tlb_misses: Total number of TLB misses
- unused: Number of unused pages
- readwss: Number of read-only pages
- writewss: Number of pages that were written to
- command: