67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
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// SPDX-License-Identifier: LGPL-2.1
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/*
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* Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "event-parse.h"
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enum tlb_flush_reason {
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TLB_FLUSH_ON_TASK_SWITCH,
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TLB_REMOTE_SHOOTDOWN,
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TLB_LOCAL_SHOOTDOWN,
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TLB_LOCAL_MM_SHOOTDOWN,
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NR_TLB_FLUSH_REASONS,
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};
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static int tlb_flush_handler(struct trace_seq *s, struct tep_record *record,
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struct tep_event *event, void *context)
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{
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unsigned long long val;
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trace_seq_printf(s, "pages=");
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tep_print_num_field(s, "%ld", event, "pages", record, 1);
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if (tep_get_field_val(s, event, "reason", record, &val, 1) < 0)
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return -1;
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trace_seq_puts(s, " reason=");
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switch (val) {
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case TLB_FLUSH_ON_TASK_SWITCH:
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trace_seq_puts(s, "flush on task switch");
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break;
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case TLB_REMOTE_SHOOTDOWN:
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trace_seq_puts(s, "remote shootdown");
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break;
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case TLB_LOCAL_SHOOTDOWN:
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trace_seq_puts(s, "local shootdown");
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break;
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case TLB_LOCAL_MM_SHOOTDOWN:
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trace_seq_puts(s, "local mm shootdown");
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break;
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}
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trace_seq_printf(s, " (%lld)", val);
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return 0;
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}
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int TEP_PLUGIN_LOADER(struct tep_handle *tep)
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{
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tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
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tlb_flush_handler, NULL);
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return 0;
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}
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void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
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{
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tep_unregister_event_handler(tep, -1,
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"tlb", "tlb_flush",
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tlb_flush_handler, NULL);
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}
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