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/*
* Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "event-parse.h"
enum tlb_flush_reason {
TLB_FLUSH_ON_TASK_SWITCH,
TLB_REMOTE_SHOOTDOWN,
TLB_LOCAL_SHOOTDOWN,
TLB_LOCAL_MM_SHOOTDOWN,
NR_TLB_FLUSH_REASONS,
};
static int tlb_flush_handler(struct trace_seq *s, struct pevent_record *record,
struct event_format *event, void *context)
{
unsigned long long val;
trace_seq_printf(s, "pages=");
pevent_print_num_field(s, "%ld", event, "pages", record, 1);
if (pevent_get_field_val(s, event, "reason", record, &val, 1) < 0)
return -1;
trace_seq_puts(s, " reason=");
switch (val) {
case TLB_FLUSH_ON_TASK_SWITCH:
trace_seq_puts(s, "flush on task switch");
break;
case TLB_REMOTE_SHOOTDOWN:
trace_seq_puts(s, "remote shootdown");
break;
case TLB_LOCAL_SHOOTDOWN:
trace_seq_puts(s, "local shootdown");
break;
case TLB_LOCAL_MM_SHOOTDOWN:
trace_seq_puts(s, "local mm shootdown");
break;
}
trace_seq_printf(s, " (%lld)", val);
return 0;
}
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_event_handler(pevent, -1, "tlb", "tlb_flush",
tlb_flush_handler, NULL);
return 0;
}
void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
{
pevent_unregister_event_handler(pevent, -1,
"tlb", "tlb_flush",
tlb_flush_handler, NULL);
}
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