From 3e14b100b0ac36bc430a4b9fb3e683dffac8b866 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Thu, 2 Jul 2020 14:53:52 -0400 Subject: [PATCH] tools lib traceevent: Add plugin for tlb_flush 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) [ Ported from trace-cmd.git ] Cc: Andrew Morton Cc: Jiri Olsa Cc: Namhyung Kim Cc: linux-trace-devel@vger.kernel.org Link: http://lore.kernel.org/lkml/20200702185704.706977382@goodmis.org Signed-off-by: Tzvetomir Stoyanov (VMware) Signed-off-by: Arnaldo Carvalho de Melo --- 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 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * 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 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ +#include +#include +#include + +#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); +}