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tools lib traceevent: Add plugin for tlb_flush

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The tlb_flush tracepoints uses enums that are not yet known by the
traceevent library. Add a plugin to handle that.

Link: http://lore.kernel.org/linux-trace-devel/20200625100516.365338-9-tz.stoyanov@gmail.com

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
[ Ported from trace-cmd.git ]
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200702185704.706977382@goodmis.org
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Steven Rostedt (Red Hat) 2020-07-02 14:53:52 -04:00 committed by Arnaldo Carvalho de Melo
parent e7a90882b0
commit 3e14b100b0
3 changed files with 83 additions and 0 deletions
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1
tools/lib/traceevent/plugins/Build
View file

@ -8,3 +8,4 @@ plugin_function-y += plugin_function.o
plugin_xen-y += plugin_xen.o
plugin_scsi-y += plugin_scsi.o
plugin_cfg80211-y += plugin_cfg80211.o
plugin_tlb-y += plugin_tlb.o

1
tools/lib/traceevent/plugins/Makefile
View file

@ -137,6 +137,7 @@ PLUGINS += plugin_function.so
PLUGINS += plugin_xen.so
PLUGINS += plugin_scsi.so
PLUGINS += plugin_cfg80211.so
PLUGINS += plugin_tlb.so
PLUGINS := $(addprefix $(OUTPUT),$(PLUGINS))
PLUGINS_IN := $(PLUGINS:.so=-in.o)

81
tools/lib/traceevent/plugins/plugin_tlb.c Normal file
View file

@ -0,0 +1,81 @@
/*
* 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 tep_record *record,
struct tep_event *event, void *context)
{
unsigned long long val;
trace_seq_printf(s, "pages=");
tep_print_num_field(s, "%ld", event, "pages", record, 1);
if (tep_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 TEP_PLUGIN_LOADER(struct tep_handle *tep)
{
tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
tlb_flush_handler, NULL);
return 0;
}
void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
{
tep_unregister_event_handler(tep, -1,
"tlb", "tlb_flush",
tlb_flush_handler, NULL);
}