aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/tools/perf/util/kwork.h
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/util/kwork.h')
-rw-r--r--tools/perf/util/kwork.h314
1 files changed, 314 insertions, 0 deletions
diff --git a/tools/perf/util/kwork.h b/tools/perf/util/kwork.h
new file mode 100644
index 000000000000..76fe2a821bcf
--- /dev/null
+++ b/tools/perf/util/kwork.h
@@ -0,0 +1,314 @@
+#ifndef PERF_UTIL_KWORK_H
+#define PERF_UTIL_KWORK_H
+
+#include "util/tool.h"
+#include "util/time-utils.h"
+
+#include <linux/bitmap.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/types.h>
+
+struct perf_sample;
+struct perf_session;
+
+enum kwork_class_type {
+ KWORK_CLASS_IRQ,
+ KWORK_CLASS_SOFTIRQ,
+ KWORK_CLASS_WORKQUEUE,
+ KWORK_CLASS_SCHED,
+ KWORK_CLASS_MAX,
+};
+
+enum kwork_report_type {
+ KWORK_REPORT_RUNTIME,
+ KWORK_REPORT_LATENCY,
+ KWORK_REPORT_TIMEHIST,
+ KWORK_REPORT_TOP,
+};
+
+enum kwork_trace_type {
+ KWORK_TRACE_RAISE,
+ KWORK_TRACE_ENTRY,
+ KWORK_TRACE_EXIT,
+ KWORK_TRACE_MAX,
+};
+
+/*
+ * data structure:
+ *
+ * +==================+ +============+ +======================+
+ * | class | | work | | atom |
+ * +==================+ +============+ +======================+
+ * +------------+ | +-----+ | | +------+ | | +-------+ +-----+ |
+ * | perf_kwork | +-> | irq | --------|+-> | eth0 | --+-> | raise | - | ... | --+ +-----------+
+ * +-----+------+ || +-----+ ||| +------+ ||| +-------+ +-----+ | | | |
+ * | || ||| ||| | +-> | atom_page |
+ * | || ||| ||| +-------+ +-----+ | | |
+ * | class_list ||| |+-> | entry | - | ... | ----> | |
+ * | || ||| ||| +-------+ +-----+ | | |
+ * | || ||| ||| | +-> | |
+ * | || ||| ||| +-------+ +-----+ | | | |
+ * | || ||| |+-> | exit | - | ... | --+ +-----+-----+
+ * | || ||| | | +-------+ +-----+ | |
+ * | || ||| | | | |
+ * | || ||| +-----+ | | | |
+ * | || |+-> | ... | | | | |
+ * | || | | +-----+ | | | |
+ * | || | | | | | |
+ * | || +---------+ | | +-----+ | | +-------+ +-----+ | |
+ * | +-> | softirq | -------> | RCU | ---+-> | raise | - | ... | --+ +-----+-----+
+ * | || +---------+ | | +-----+ ||| +-------+ +-----+ | | | |
+ * | || | | ||| | +-> | atom_page |
+ * | || | | ||| +-------+ +-----+ | | |
+ * | || | | |+-> | entry | - | ... | ----> | |
+ * | || | | ||| +-------+ +-----+ | | |
+ * | || | | ||| | +-> | |
+ * | || | | ||| +-------+ +-----+ | | | |
+ * | || | | |+-> | exit | - | ... | --+ +-----+-----+
+ * | || | | | | +-------+ +-----+ | |
+ * | || | | | | | |
+ * | || +-----------+ | | +-----+ | | | |
+ * | +-> | workqueue | -----> | ... | | | | |
+ * | | +-----------+ | | +-----+ | | | |
+ * | +==================+ +============+ +======================+ |
+ * | |
+ * +----> atom_page_list ---------------------------------------------------------+
+ *
+ */
+
+struct kwork_atom {
+ struct list_head list;
+ u64 time;
+ struct kwork_atom *prev;
+
+ void *page_addr;
+ unsigned long bit_inpage;
+};
+
+#define NR_ATOM_PER_PAGE 128
+struct kwork_atom_page {
+ struct list_head list;
+ struct kwork_atom atoms[NR_ATOM_PER_PAGE];
+ DECLARE_BITMAP(bitmap, NR_ATOM_PER_PAGE);
+};
+
+struct perf_kwork;
+struct kwork_class;
+struct kwork_work {
+ /*
+ * class field
+ */
+ struct rb_node node;
+ struct kwork_class *class;
+
+ /*
+ * work field
+ */
+ u64 id;
+ int cpu;
+ char *name;
+
+ /*
+ * atom field
+ */
+ u64 nr_atoms;
+ struct list_head atom_list[KWORK_TRACE_MAX];
+
+ /*
+ * runtime report
+ */
+ u64 max_runtime;
+ u64 max_runtime_start;
+ u64 max_runtime_end;
+ u64 total_runtime;
+
+ /*
+ * latency report
+ */
+ u64 max_latency;
+ u64 max_latency_start;
+ u64 max_latency_end;
+ u64 total_latency;
+
+ /*
+ * top report
+ */
+ u32 cpu_usage;
+ u32 tgid;
+ bool is_kthread;
+};
+
+struct kwork_class {
+ struct list_head list;
+ const char *name;
+ enum kwork_class_type type;
+
+ unsigned int nr_tracepoints;
+ const struct evsel_str_handler *tp_handlers;
+
+ struct rb_root_cached work_root;
+
+ int (*class_init)(struct kwork_class *class,
+ struct perf_session *session);
+
+ void (*work_init)(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct kwork_work *work,
+ enum kwork_trace_type src_type,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine);
+
+ void (*work_name)(struct kwork_work *work,
+ char *buf, int len);
+};
+
+struct trace_kwork_handler {
+ int (*raise_event)(struct perf_kwork *kwork,
+ struct kwork_class *class, struct evsel *evsel,
+ struct perf_sample *sample, struct machine *machine);
+
+ int (*entry_event)(struct perf_kwork *kwork,
+ struct kwork_class *class, struct evsel *evsel,
+ struct perf_sample *sample, struct machine *machine);
+
+ int (*exit_event)(struct perf_kwork *kwork,
+ struct kwork_class *class, struct evsel *evsel,
+ struct perf_sample *sample, struct machine *machine);
+
+ int (*sched_switch_event)(struct perf_kwork *kwork,
+ struct kwork_class *class, struct evsel *evsel,
+ struct perf_sample *sample, struct machine *machine);
+};
+
+struct __top_cpus_runtime {
+ u64 load;
+ u64 idle;
+ u64 irq;
+ u64 softirq;
+ u64 total;
+};
+
+struct kwork_top_stat {
+ DECLARE_BITMAP(all_cpus_bitmap, MAX_NR_CPUS);
+ struct __top_cpus_runtime *cpus_runtime;
+};
+
+struct perf_kwork {
+ /*
+ * metadata
+ */
+ struct perf_tool tool;
+ struct list_head class_list;
+ struct list_head atom_page_list;
+ struct list_head sort_list, cmp_id;
+ struct rb_root_cached sorted_work_root;
+ const struct trace_kwork_handler *tp_handler;
+
+ /*
+ * profile filters
+ */
+ const char *profile_name;
+
+ const char *cpu_list;
+ DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
+
+ const char *time_str;
+ struct perf_time_interval ptime;
+
+ /*
+ * options for command
+ */
+ bool force;
+ const char *event_list_str;
+ enum kwork_report_type report;
+
+ /*
+ * options for subcommand
+ */
+ bool summary;
+ const char *sort_order;
+ bool show_callchain;
+ unsigned int max_stack;
+ bool use_bpf;
+
+ /*
+ * statistics
+ */
+ u64 timestart;
+ u64 timeend;
+
+ unsigned long nr_events;
+ unsigned long nr_lost_chunks;
+ unsigned long nr_lost_events;
+
+ u64 all_runtime;
+ u64 all_count;
+ u64 nr_skipped_events[KWORK_TRACE_MAX + 1];
+
+ /*
+ * perf kwork top data
+ */
+ struct kwork_top_stat top_stat;
+};
+
+struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct kwork_work *key);
+
+#ifdef HAVE_BPF_SKEL
+
+int perf_kwork__trace_prepare_bpf(struct perf_kwork *kwork);
+int perf_kwork__report_read_bpf(struct perf_kwork *kwork);
+void perf_kwork__report_cleanup_bpf(void);
+
+void perf_kwork__trace_start(void);
+void perf_kwork__trace_finish(void);
+
+int perf_kwork__top_prepare_bpf(struct perf_kwork *kwork);
+int perf_kwork__top_read_bpf(struct perf_kwork *kwork);
+void perf_kwork__top_cleanup_bpf(void);
+
+void perf_kwork__top_start(void);
+void perf_kwork__top_finish(void);
+
+#else /* !HAVE_BPF_SKEL */
+
+static inline int
+perf_kwork__trace_prepare_bpf(struct perf_kwork *kwork __maybe_unused)
+{
+ return -1;
+}
+
+static inline int
+perf_kwork__report_read_bpf(struct perf_kwork *kwork __maybe_unused)
+{
+ return -1;
+}
+
+static inline void perf_kwork__report_cleanup_bpf(void) {}
+
+static inline void perf_kwork__trace_start(void) {}
+static inline void perf_kwork__trace_finish(void) {}
+
+static inline int
+perf_kwork__top_prepare_bpf(struct perf_kwork *kwork __maybe_unused)
+{
+ return -1;
+}
+
+static inline int
+perf_kwork__top_read_bpf(struct perf_kwork *kwork __maybe_unused)
+{
+ return -1;
+}
+
+static inline void perf_kwork__top_cleanup_bpf(void) {}
+
+static inline void perf_kwork__top_start(void) {}
+static inline void perf_kwork__top_finish(void) {}
+
+#endif /* HAVE_BPF_SKEL */
+
+#endif /* PERF_UTIL_KWORK_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.