eBPF Hard IRQ latency (#11410)

1 files changed, 74 insertions, 0 deletions

diff --git a/collectors/ebpf.plugin/ebpf_hardirq.h b/collectors/ebpf.plugin/ebpf_hardirq.h
new file mode 100644
index 0000000000..d67c337247
--- /dev/null
+++ b/collectors/ebpf.plugin/ebpf_hardirq.h
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_EBPF_HARDIRQ_H
+#define NETDATA_EBPF_HARDIRQ_H 1
+
+/*****************************************************************
+ *  copied from kernel-collectors repo, with modifications needed
+ *  for inclusion here.
+ *****************************************************************/
+
+#define NETDATA_HARDIRQ_NAME_LEN 32
+#define NETDATA_HARDIRQ_MAX_IRQS 1024L
+
+typedef struct hardirq_ebpf_key {
+    int irq;
+} hardirq_ebpf_key_t;
+
+typedef struct hardirq_ebpf_val {
+    uint64_t latency;
+    uint64_t ts;
+    char name[NETDATA_HARDIRQ_NAME_LEN];
+} hardirq_ebpf_val_t;
+
+enum hardirq_ebpf_static {
+    HARDIRQ_EBPF_STATIC_APIC_THERMAL,
+    HARDIRQ_EBPF_STATIC_APIC_THRESHOLD,
+    HARDIRQ_EBPF_STATIC_APIC_ERROR,
+    HARDIRQ_EBPF_STATIC_APIC_DEFERRED_ERROR,
+    HARDIRQ_EBPF_STATIC_APIC_SPURIOUS,
+    HARDIRQ_EBPF_STATIC_FUNC_CALL,
+    HARDIRQ_EBPF_STATIC_FUNC_CALL_SINGLE,
+    HARDIRQ_EBPF_STATIC_RESCHEDULE,
+    HARDIRQ_EBPF_STATIC_LOCAL_TIMER,
+    HARDIRQ_EBPF_STATIC_IRQ_WORK,
+    HARDIRQ_EBPF_STATIC_X86_PLATFORM_IPI,
+
+    HARDIRQ_EBPF_STATIC_END
+};
+
+typedef struct hardirq_ebpf_static_val {
+    uint64_t latency;
+    uint64_t ts;
+} hardirq_ebpf_static_val_t;
+
+/*****************************************************************
+ * below this is eBPF plugin-specific code.
+ *****************************************************************/
+
+#define NETDATA_EBPF_MODULE_NAME_HARDIRQ "hardirq"
+#define NETDATA_HARDIRQ_SLEEP_MS 650000ULL
+#define NETDATA_HARDIRQ_CONFIG_FILE "hardirq.conf"
+
+typedef struct hardirq_val {
+    // must be at top for simplified AVL tree usage.
+    // if it's not at the top, we need to use `containerof` for almost all ops.
+    avl_t avl;
+
+    int irq;
+    bool dim_exists; // keep this after `int irq` for alignment byte savings.
+    uint64_t latency;
+    char name[NETDATA_HARDIRQ_NAME_LEN];
+} hardirq_val_t;
+
+typedef struct hardirq_static_val {
+    enum hardirq_ebpf_static idx;
+    char *name;
+    uint64_t latency;
+} hardirq_static_val_t;
+
+extern struct config hardirq_config;
+extern void *ebpf_hardirq_thread(void *ptr);
+extern void ebpf_hardirq_create_apps_charts(struct ebpf_module *em, void *ptr);
+
+#endif /* NETDATA_EBPF_HARDIRQ_H */