This defines the basics of a new boot time measurement feature. This allows
logging of very accurate time measurements as the boot proceeds, by using
an available microsecond counter.
To enable the feature, define CONFIG_BOOTSTAGE in your board config file.
Also available is CONFIG_BOOTSTAGE_REPORT which will cause a report to be
printed just before handing off to the OS.
Most IDs are not named at this stage. For that I would first like to
renumber them all.
Timer summary in microseconds:
Mark Elapsed Stage
0 0 reset
205,000 205,000 board_init_f
6,053,000 5,848,000 bootm_start
6,053,000 0 id=1
6,058,000 5,000 id=101
6,058,000 0 id=100
6,061,000 3,000 id=103
6,064,000 3,000 id=104
6,093,000 29,000 id=107
6,093,000 0 id=106
6,093,000 0 id=105
6,093,000 0 id=108
7,089,000 996,000 id=7
7,089,000 0 id=15
7,089,000 0 id=8
7,097,000 8,000 start_kernel
Signed-off-by: Simon Glass <sjg@chromium.org>
master
Simon Glass
13 years ago
committed by
Wolfgang Denk
parent
770605e4f9
commit
3a608ca01d
@ -0,0 +1,158 @@ |
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/*
|
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* Copyright (c) 2011, Google Inc. All rights reserved. |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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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, |
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* MA 02111-1307 USA |
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*/ |
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|
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|
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/*
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* This module records the progress of boot and arbitrary commands, and |
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* permits accurate timestamping of each. |
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* |
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* TBD: Pass timings to kernel in the FDT |
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*/ |
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#include <common.h> |
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#include <libfdt.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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enum bootstage_flags { |
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BOOTSTAGEF_ERROR = 1 << 0, /* Error record */ |
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BOOTSTAGEF_ALLOC = 1 << 1, /* Allocate an id */ |
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}; |
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struct bootstage_record { |
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ulong time_us; |
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const char *name; |
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int flags; /* see enum bootstage_flags */ |
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enum bootstage_id id; |
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}; |
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static struct bootstage_record record[BOOTSTAGE_ID_COUNT] = { {1} }; |
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static int next_id = BOOTSTAGE_ID_USER; |
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ulong bootstage_add_record(enum bootstage_id id, const char *name, |
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int flags) |
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{ |
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struct bootstage_record *rec; |
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ulong mark = timer_get_boot_us(); |
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if (flags & BOOTSTAGEF_ALLOC) |
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id = next_id++; |
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if (id < BOOTSTAGE_ID_COUNT) { |
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rec = &record[id]; |
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/* Only record the first event for each */ |
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if (!rec->time_us) { |
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rec->time_us = mark; |
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rec->name = name; |
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rec->flags = flags; |
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rec->id = id; |
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} |
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} |
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/* Tell the board about this progress */ |
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show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id); |
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return mark; |
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} |
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ulong bootstage_mark(enum bootstage_id id) |
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{ |
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return bootstage_add_record(id, NULL, 0); |
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} |
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ulong bootstage_error(enum bootstage_id id) |
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{ |
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return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR); |
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} |
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ulong bootstage_mark_name(enum bootstage_id id, const char *name) |
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{ |
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int flags = 0; |
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if (id == BOOTSTAGE_ID_ALLOC) |
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flags = BOOTSTAGEF_ALLOC; |
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return bootstage_add_record(id, name, flags); |
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} |
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static void print_time(unsigned long us_time) |
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{ |
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char str[15], *s; |
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int grab = 3; |
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/* We don't seem to have %'d in U-Boot */ |
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sprintf(str, "%12lu", us_time); |
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for (s = str + 3; *s; s += grab) { |
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if (s != str + 3) |
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putc(s[-1] != ' ' ? ',' : ' '); |
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printf("%.*s", grab, s); |
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grab = 3; |
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} |
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} |
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static uint32_t print_time_record(enum bootstage_id id, |
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struct bootstage_record *rec, uint32_t prev) |
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{ |
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print_time(rec->time_us); |
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print_time(rec->time_us - prev); |
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if (rec->name) |
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printf(" %s\n", rec->name); |
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else if (id >= BOOTSTAGE_ID_USER) |
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printf(" user_%d\n", id - BOOTSTAGE_ID_USER); |
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else |
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printf(" id=%d\n", id); |
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return rec->time_us; |
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} |
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static int h_compare_record(const void *r1, const void *r2) |
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{ |
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const struct bootstage_record *rec1 = r1, *rec2 = r2; |
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return rec1->time_us > rec2->time_us ? 1 : -1; |
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} |
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void bootstage_report(void) |
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{ |
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struct bootstage_record *rec = record; |
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int id; |
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uint32_t prev; |
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puts("Timer summary in microseconds:\n"); |
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printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage"); |
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/* Fake the first record - we could get it from early boot */ |
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rec->name = "reset"; |
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rec->time_us = 0; |
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prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0); |
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/* Sort records by increasing time */ |
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qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record); |
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for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) { |
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if (rec->time_us != 0) |
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prev = print_time_record(rec->id, rec, prev); |
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} |
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if (next_id > BOOTSTAGE_ID_COUNT) |
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printf("(Overflowed internal boot id table by %d entries\n" |
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"- please increase CONFIG_BOOTSTAGE_USER_COUNT\n", |
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next_id - BOOTSTAGE_ID_COUNT); |
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} |
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