Backporting sched_switch plugin. Signed-off-by: Jiri Olsa <[email protected]> Cc: Corey Ashford <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: David Ahern <[email protected]> --- tools/lib/traceevent/Makefile | 2 +- tools/lib/traceevent/plugin_sched_switch.c | 147 +++++++++++++++++++++++++++++ 2 files changed, 148 insertions(+), 1 deletion(-) create mode 100644 tools/lib/traceevent/plugin_sched_switch.c
diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile index 690e107..3a5ffd3 100644 --- a/tools/lib/traceevent/Makefile +++ b/tools/lib/traceevent/Makefile @@ -209,7 +209,7 @@ PEVENT_LIB_OBJS = event-parse.o event-plugin.o trace-seq.o parse-filter.o parse- PEVENT_LIB_OBJS += kbuffer-parse.o PLUGIN_OBJS = plugin_jbd2.o plugin_blk.o plugin_hrtimer.o plugin_kmem.o plugin_kvm.o \ - plugin_mac80211.o + plugin_mac80211.o plugin_sched_switch.o PLUGINS := $(PLUGIN_OBJS:.o=.so) diff --git a/tools/lib/traceevent/plugin_sched_switch.c b/tools/lib/traceevent/plugin_sched_switch.c new file mode 100644 index 0000000..63c422c --- /dev/null +++ b/tools/lib/traceevent/plugin_sched_switch.c @@ -0,0 +1,147 @@ +/* + * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <[email protected]> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * 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" + +static void write_state(struct trace_seq *s, int val) +{ + const char states[] = "SDTtZXxW"; + int found = 0; + int i; + + for (i=0; i < (sizeof(states) - 1); i++) { + if (!(val & (1 << i))) + continue; + + if (found) + trace_seq_putc(s, '|'); + + found = 1; + trace_seq_putc(s, states[i]); + } + + if (!found) + trace_seq_putc(s, 'R'); +} + +static void write_and_save_comm(struct format_field *field, + struct pevent_record *record, + struct trace_seq *s, int pid) +{ + const char *comm; + int len; + + comm = (char *)(record->data + field->offset); + len = s->len; + trace_seq_printf(s, "%.*s", + field->size, comm); + + /* make sure the comm has a \0 at the end. */ + trace_seq_terminate(s); + comm = &s->buffer[len]; + + /* Help out the comm to ids. This will handle dups */ + pevent_register_comm(field->event->pevent, comm, pid); +} + +static int sched_wakeup_handler(struct trace_seq *s, struct pevent_record *record, + struct event_format *event, void *context) +{ + struct format_field *field; + unsigned long long val; + + if (pevent_get_field_val(s, event, "pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = pevent_find_any_field(event, "comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld", val); + + if (pevent_get_field_val(s, event, "prio", record, &val, 0) == 0) + trace_seq_printf(s, " [%lld]", val); + + if (pevent_get_field_val(s, event, "success", record, &val, 1) == 0) + trace_seq_printf(s, " success=%lld", val); + + if (pevent_get_field_val(s, event, "target_cpu", record, &val, 0) == 0) + trace_seq_printf(s, " CPU:%03llu", val); + + return 0; +} + +static int sched_switch_handler(struct trace_seq *s, struct pevent_record *record, + struct event_format *event, void *context) +{ + struct format_field *field; + unsigned long long val; + + if (pevent_get_field_val(s, event, "prev_pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = pevent_find_any_field(event, "prev_comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld ", val); + + if (pevent_get_field_val(s, event, "prev_prio", record, &val, 0) == 0) + trace_seq_printf(s, "[%lld] ", val); + + if (pevent_get_field_val(s, event, "prev_state", record, &val, 0) == 0) + write_state(s, val); + + trace_seq_puts(s, " ==> "); + + if (pevent_get_field_val(s, event, "next_pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = pevent_find_any_field(event, "next_comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld", val); + + if (pevent_get_field_val(s, event, "next_prio", record, &val, 0) == 0) + trace_seq_printf(s, " [%lld]", val); + + return 0; +} + +int PEVENT_PLUGIN_LOADER(struct pevent *pevent) +{ + pevent_register_event_handler(pevent, -1, "sched", "sched_switch", + sched_switch_handler, NULL); + + pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup", + sched_wakeup_handler, NULL); + + pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup_new", + sched_wakeup_handler, NULL); + + return 0; +} -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
