File: cachestat.meta

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title: Count Page Cache Hits and Misses
name: cachestat.stp
version: 1.0
author: David Valin and Serhei Makarov
keywords: memory bpf
subsystem: memory
status: experimental
exit: user-controlled
output: timed on-exit
scope: system-wide
description: Monitors hits and misses to the page cache and reports a count every 5 seconds. Based on a bpftrace tool by David Valin.
test_check: stap -p4 cachestat.stp
test_installcheck: stap cachestat.stp -T 1
test_check_bpf: stap --bpf -p4 cachestat.stp
test_installcheck_bpf: stap --bpf cachestat.stp -T 1