92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ftrace.h>
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#include <linux/tracepoint.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/rv.h>
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#include <rv/instrumentation.h>
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#include <rv/da_monitor.h>
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#define MODULE_NAME "tss"
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#include <trace/events/sched.h>
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#include <rv_trace.h>
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#include <monitors/sched/sched.h>
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#include "tss.h"
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static struct rv_monitor rv_tss;
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DECLARE_DA_MON_PER_CPU(tss, unsigned char);
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static void handle_sched_switch(void *data, bool preempt,
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struct task_struct *prev,
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struct task_struct *next,
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unsigned int prev_state)
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{
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da_handle_event_tss(sched_switch_tss);
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}
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static void handle_schedule_entry(void *data, bool preempt, unsigned long ip)
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{
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da_handle_event_tss(schedule_entry_tss);
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}
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static void handle_schedule_exit(void *data, bool is_switch, unsigned long ip)
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{
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da_handle_start_event_tss(schedule_exit_tss);
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}
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static int enable_tss(void)
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{
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int retval;
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retval = da_monitor_init_tss();
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if (retval)
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return retval;
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rv_attach_trace_probe("tss", sched_switch, handle_sched_switch);
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rv_attach_trace_probe("tss", sched_entry_tp, handle_schedule_entry);
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rv_attach_trace_probe("tss", sched_exit_tp, handle_schedule_exit);
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return 0;
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}
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static void disable_tss(void)
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{
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rv_tss.enabled = 0;
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rv_detach_trace_probe("tss", sched_switch, handle_sched_switch);
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rv_detach_trace_probe("tss", sched_entry_tp, handle_schedule_entry);
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rv_detach_trace_probe("tss", sched_exit_tp, handle_schedule_exit);
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da_monitor_destroy_tss();
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}
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static struct rv_monitor rv_tss = {
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.name = "tss",
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.description = "task switch while scheduling.",
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.enable = enable_tss,
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.disable = disable_tss,
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.reset = da_monitor_reset_all_tss,
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.enabled = 0,
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};
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static int __init register_tss(void)
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{
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rv_register_monitor(&rv_tss, &rv_sched);
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return 0;
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}
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static void __exit unregister_tss(void)
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{
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rv_unregister_monitor(&rv_tss);
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}
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module_init(register_tss);
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module_exit(unregister_tss);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Gabriele Monaco <gmonaco@redhat.com>");
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MODULE_DESCRIPTION("tss: task switch while scheduling.");
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