From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
Subject: [PATCH 8/9] tools lib traceevent: Add plugin for tlb_flush
Date: Thu, 02 Jul 2020 13:10:24 -0400 [thread overview]
Message-ID: <20200702171158.102647075@goodmis.org> (raw)
In-Reply-To: 20200702171016.178196716@goodmis.org
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
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 <rostedt@goodmis.org>
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
tools/lib/traceevent/plugins/Build | 1 +
tools/lib/traceevent/plugins/Makefile | 1 +
tools/lib/traceevent/plugins/plugin_tlb.c | 81 +++++++++++++++++++++++
3 files changed, 83 insertions(+)
create mode 100644 tools/lib/traceevent/plugins/plugin_tlb.c
diff --git a/tools/lib/traceevent/plugins/Build b/tools/lib/traceevent/plugins/Build
index 210d26910613..b866f231a536 100644
--- a/tools/lib/traceevent/plugins/Build
+++ b/tools/lib/traceevent/plugins/Build
@@ -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
\ No newline at end of file
diff --git a/tools/lib/traceevent/plugins/Makefile b/tools/lib/traceevent/plugins/Makefile
index 349bb81482ab..8e72707e8630 100644
--- a/tools/lib/traceevent/plugins/Makefile
+++ b/tools/lib/traceevent/plugins/Makefile
@@ -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)
diff --git a/tools/lib/traceevent/plugins/plugin_tlb.c b/tools/lib/traceevent/plugins/plugin_tlb.c
new file mode 100644
index 000000000000..1adade776306
--- /dev/null
+++ b/tools/lib/traceevent/plugins/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 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);
+}
--
2.26.2
next prev parent reply other threads:[~2020-07-02 17:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-02 17:10 [PATCH 0/9] tools lib traceevent: Patches from the trace-cmd repo Steven Rostedt
2020-07-02 17:10 ` [PATCH 1/9] tools lib traceevent: Add API to read time information from kbuffer Steven Rostedt
2020-07-02 17:10 ` [PATCH 2/9] tools lib traceevent: Add proper KBUFFER_TYPE_TIME_STAMP handling Steven Rostedt
2020-07-02 17:10 ` [PATCH 3/9] tools lib traceevent: Add tep_load_plugins_hook() API Steven Rostedt
2020-07-02 17:10 ` [PATCH 4/9] tools lib traceevent: Add interface for options to plugins Steven Rostedt
2020-07-02 17:10 ` [PATCH 5/9] tools lib traceevent: Introduced new traceevent API, for adding new plugins directories Steven Rostedt
2020-07-02 17:10 ` [PATCH 6/9] tools lib traceevent: Add support for more printk format specifiers Steven Rostedt
2020-07-02 17:10 ` [PATCH 7/9] tools lib traceevent: Optimize pretty_print() function Steven Rostedt
2020-07-02 17:10 ` Steven Rostedt [this message]
2020-07-02 17:10 ` [PATCH 9/9] tools lib traceevent: Add more SVM exit reasons Steven Rostedt
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