![Christoph Hellwig](/assets/img/avatar_default.png)
The new name is irq_poll as iopoll is already taken. Better suggestions welcome. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
240 lines
5.3 KiB
C
240 lines
5.3 KiB
C
/*
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* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include "../perf.h"
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#include "util.h"
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#include "trace-event.h"
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static int get_common_field(struct scripting_context *context,
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int *offset, int *size, const char *type)
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{
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struct pevent *pevent = context->pevent;
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struct event_format *event;
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struct format_field *field;
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if (!*size) {
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if (!pevent->events)
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return 0;
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event = pevent->events[0];
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field = pevent_find_common_field(event, type);
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if (!field)
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return 0;
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*offset = field->offset;
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*size = field->size;
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}
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return pevent_read_number(pevent, context->event_data + *offset, *size);
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}
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int common_lock_depth(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_lock_depth");
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if (ret < 0)
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return -1;
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return ret;
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}
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int common_flags(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_flags");
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if (ret < 0)
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return -1;
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return ret;
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}
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int common_pc(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_preempt_count");
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if (ret < 0)
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return -1;
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return ret;
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}
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unsigned long long
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raw_field_value(struct event_format *event, const char *name, void *data)
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{
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struct format_field *field;
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unsigned long long val;
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field = pevent_find_any_field(event, name);
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if (!field)
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return 0ULL;
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pevent_read_number_field(field, data, &val);
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return val;
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}
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unsigned long long read_size(struct event_format *event, void *ptr, int size)
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{
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return pevent_read_number(event->pevent, ptr, size);
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}
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void event_format__fprintf(struct event_format *event,
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int cpu, void *data, int size, FILE *fp)
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{
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struct pevent_record record;
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struct trace_seq s;
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memset(&record, 0, sizeof(record));
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record.cpu = cpu;
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record.size = size;
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record.data = data;
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trace_seq_init(&s);
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pevent_event_info(&s, event, &record);
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trace_seq_do_fprintf(&s, fp);
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trace_seq_destroy(&s);
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}
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void event_format__print(struct event_format *event,
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int cpu, void *data, int size)
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{
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return event_format__fprintf(event, cpu, data, size, stdout);
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}
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void parse_ftrace_printk(struct pevent *pevent,
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char *file, unsigned int size __maybe_unused)
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{
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unsigned long long addr;
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char *printk;
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char *line;
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char *next = NULL;
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char *addr_str;
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char *fmt = NULL;
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line = strtok_r(file, "\n", &next);
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while (line) {
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addr_str = strtok_r(line, ":", &fmt);
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if (!addr_str) {
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warning("printk format with empty entry");
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break;
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}
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addr = strtoull(addr_str, NULL, 16);
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/* fmt still has a space, skip it */
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printk = strdup(fmt+1);
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line = strtok_r(NULL, "\n", &next);
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pevent_register_print_string(pevent, printk, addr);
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}
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}
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int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
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{
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return pevent_parse_event(pevent, buf, size, "ftrace");
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}
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int parse_event_file(struct pevent *pevent,
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char *buf, unsigned long size, char *sys)
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{
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return pevent_parse_event(pevent, buf, size, sys);
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}
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struct event_format *trace_find_next_event(struct pevent *pevent,
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struct event_format *event)
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{
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static int idx;
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if (!pevent || !pevent->events)
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return NULL;
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if (!event) {
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idx = 0;
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return pevent->events[0];
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}
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if (idx < pevent->nr_events && event == pevent->events[idx]) {
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idx++;
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if (idx == pevent->nr_events)
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return NULL;
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return pevent->events[idx];
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}
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for (idx = 1; idx < pevent->nr_events; idx++) {
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if (event == pevent->events[idx - 1])
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return pevent->events[idx];
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}
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return NULL;
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}
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struct flag {
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const char *name;
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unsigned long long value;
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};
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static const struct flag flags[] = {
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{ "HI_SOFTIRQ", 0 },
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{ "TIMER_SOFTIRQ", 1 },
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{ "NET_TX_SOFTIRQ", 2 },
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{ "NET_RX_SOFTIRQ", 3 },
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{ "BLOCK_SOFTIRQ", 4 },
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{ "IRQ_POLL_SOFTIRQ", 5 },
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{ "TASKLET_SOFTIRQ", 6 },
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{ "SCHED_SOFTIRQ", 7 },
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{ "HRTIMER_SOFTIRQ", 8 },
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{ "RCU_SOFTIRQ", 9 },
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{ "HRTIMER_NORESTART", 0 },
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{ "HRTIMER_RESTART", 1 },
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};
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unsigned long long eval_flag(const char *flag)
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{
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int i;
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/*
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* Some flags in the format files do not get converted.
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* If the flag is not numeric, see if it is something that
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* we already know about.
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*/
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if (isdigit(flag[0]))
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return strtoull(flag, NULL, 0);
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for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
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if (strcmp(flags[i].name, flag) == 0)
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return flags[i].value;
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return 0;
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}
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