Merge pull request #117 from jichenjc/fix_2

fix: add page hit
sustainable-computing-io · Oct 31, 2023 · d01caa4 · d01caa4
2 parents 5ed913c + c4c2825
commit d01caa4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/docs/design/ebpf_in_kepler.md b/docs/design/ebpf_in_kepler.md
@@ -130,6 +130,10 @@ HZ = 1000
 
 This value is stored in array `cpu_freq_array`
 
+## Calculate 'page cache hit'
+
+The probe function in kepler `kprobe__set_page_dirty` and `kprobe__mark_page_accessed` are used to track page cache hit for write and read action respectively.
+
 ## Process Table
 
 The bpf program maintains a bpf hash named `processes`. This hash maintains data calculated for a process. Kepler reads values from this hash ( known as a `Table` in bcc ) and generates metrics.