trace-cmd: Add plugin for tlb_flush
The tlb_flush tracepoints uses enums that are not yet known by
trace-cmd. Add a plugin to handle that.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/Makefile b/Makefile
index b92bbea..63f7e79 100644
--- a/Makefile
+++ b/Makefile
@@ -334,6 +334,7 @@
PLUGIN_OBJS += plugin_scsi.o
PLUGIN_OBJS += plugin_cfg80211.o
PLUGIN_OBJS += plugin_blk.o
+PLUGIN_OBJS += plugin_tlb.o
PLUGINS := $(PLUGIN_OBJS:.o=.so)
diff --git a/plugin_tlb.c b/plugin_tlb.c
new file mode 100644
index 0000000..e1d85dc
--- /dev/null
+++ b/plugin_tlb.c
@@ -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 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);
+}
