1 files changed, 95 insertions, 0 deletions
diff --git a/collectors/ebpf.plugin/ebpf_cachestat.h b/collectors/ebpf.plugin/ebpf_cachestat.h
new file mode 100644
index 00000000..ba2b1283
--- /dev/null
+++ b/collectors/ebpf.plugin/ebpf_cachestat.h
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_EBPF_CACHESTAT_H
+#define NETDATA_EBPF_CACHESTAT_H 1
+
+// Module name & description
+#define NETDATA_EBPF_MODULE_NAME_CACHESTAT "cachestat"
+#define NETDATA_EBPF_CACHESTAT_MODULE_DESC "Monitor Linux page cache internal functions. This thread is integrated with apps and cgroup."
+
+// charts
+#define NETDATA_CACHESTAT_HIT_RATIO_CHART "cachestat_ratio"
+#define NETDATA_CACHESTAT_DIRTY_CHART "cachestat_dirties"
+#define NETDATA_CACHESTAT_HIT_CHART "cachestat_hits"
+#define NETDATA_CACHESTAT_MISSES_CHART "cachestat_misses"
+
+#define NETDATA_CACHESTAT_SUBMENU "page_cache"
+#define NETDATA_CACHESTAT_CGROUP_SUBMENU "page cache (eBPF)"
+
+#define EBPF_CACHESTAT_DIMENSION_PAGE "pages/s"
+#define EBPF_CACHESTAT_DIMENSION_HITS "hits/s"
+#define EBPF_CACHESTAT_DIMENSION_MISSES "misses/s"
+
+// configuration file
+#define NETDATA_CACHESTAT_CONFIG_FILE "cachestat.conf"
+
+// Contexts
+#define NETDATA_CGROUP_CACHESTAT_HIT_RATIO_CONTEXT "cgroup.cachestat_ratio"
+#define NETDATA_CGROUP_CACHESTAT_MODIFIED_CACHE_CONTEXT "cgroup.cachestat_dirties"
+#define NETDATA_CGROUP_CACHESTAT_HIT_FILES_CONTEXT "cgroup.cachestat_hits"
+#define NETDATA_CGROUP_CACHESTAT_MISS_FILES_CONTEXT "cgroup.cachestat_misses"
+
+#define NETDATA_SYSTEMD_CACHESTAT_HIT_RATIO_CONTEXT "services.cachestat_ratio"
+#define NETDATA_SYSTEMD_CACHESTAT_MODIFIED_CACHE_CONTEXT "services.cachestat_dirties"
+#define NETDATA_SYSTEMD_CACHESTAT_HIT_FILE_CONTEXT "services.cachestat_hits"
+#define NETDATA_SYSTEMD_CACHESTAT_MISS_FILES_CONTEXT "services.cachestat_misses"
+
+// ARAL Name
+#define NETDATA_EBPF_CACHESTAT_ARAL_NAME "ebpf_cachestat"
+
+// variables
+enum cachestat_counters {
+    NETDATA_KEY_CALLS_ADD_TO_PAGE_CACHE_LRU,
+    NETDATA_KEY_CALLS_MARK_PAGE_ACCESSED,
+    NETDATA_KEY_CALLS_ACCOUNT_PAGE_DIRTIED,
+    NETDATA_KEY_CALLS_MARK_BUFFER_DIRTY,
+
+    NETDATA_CACHESTAT_END
+};
+
+enum cachestat_account_dirty_pages {
+    NETDATA_CACHESTAT_ACCOUNT_PAGE_DIRTY,
+    NETDATA_CACHESTAT_SET_PAGE_DIRTY,
+    NETDATA_CACHESTAT_FOLIO_DIRTY,
+
+    NETDATA_CACHESTAT_ACCOUNT_DIRTY_END
+};
+
+enum cachestat_indexes {
+    NETDATA_CACHESTAT_IDX_RATIO,
+    NETDATA_CACHESTAT_IDX_DIRTY,
+    NETDATA_CACHESTAT_IDX_HIT,
+    NETDATA_CACHESTAT_IDX_MISS
+};
+
+enum cachestat_tables {
+    NETDATA_CACHESTAT_GLOBAL_STATS,
+    NETDATA_CACHESTAT_PID_STATS,
+    NETDATA_CACHESTAT_CTRL
+};
+
+typedef struct netdata_publish_cachestat_pid {
+    uint64_t add_to_page_cache_lru;
+    uint64_t mark_page_accessed;
+    uint64_t account_page_dirtied;
+    uint64_t mark_buffer_dirty;
+} netdata_cachestat_pid_t;
+
+typedef struct netdata_publish_cachestat {
+    long long ratio;
+    long long dirty;
+    long long hit;
+    long long miss;
+
+    netdata_cachestat_pid_t current;
+    netdata_cachestat_pid_t prev;
+} netdata_publish_cachestat_t;
+
+void *ebpf_cachestat_thread(void *ptr);
+void ebpf_cachestat_release(netdata_publish_cachestat_t *stat);
+
+extern struct config cachestat_config;
+extern netdata_ebpf_targets_t cachestat_targets[];
+extern ebpf_local_maps_t cachestat_maps[];
+
+#endif // NETDATA_EBPF_CACHESTAT_H