resource_track.c revision 1eb31c4885156b595e6ceb4516cb1e1fb2d251fd 
1/*
2 * resource_track.c --- resource tracking
3 *
4 * Copyright (C) 2013 by Theodore Ts'o
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12
13#include "config.h"
14#include "resize2fs.h"
15#include <time.h>
16#ifdef HAVE_MALLOC_H
17#include <malloc.h>
18#endif
19#include <sys/resource.h>
20
21void init_resource_track(struct resource_track *track, const char *desc,
22			 io_channel channel)
23{
24#ifdef HAVE_GETRUSAGE
25	struct rusage r;
26#endif
27	io_stats io_start = 0;
28
29	track->desc = desc;
30	track->brk_start = sbrk(0);
31	gettimeofday(&track->time_start, 0);
32#ifdef HAVE_GETRUSAGE
33#ifdef sun
34	memset(&r, 0, sizeof(struct rusage));
35#endif
36	getrusage(RUSAGE_SELF, &r);
37	track->user_start = r.ru_utime;
38	track->system_start = r.ru_stime;
39#else
40	track->user_start.tv_sec = track->user_start.tv_usec = 0;
41	track->system_start.tv_sec = track->system_start.tv_usec = 0;
42#endif
43	track->bytes_read = 0;
44	track->bytes_written = 0;
45	if (channel && channel->manager && channel->manager->get_stats)
46		channel->manager->get_stats(channel, &io_start);
47	if (io_start) {
48		track->bytes_read = io_start->bytes_read;
49		track->bytes_written = io_start->bytes_written;
50	}
51}
52
53static float timeval_subtract(struct timeval *tv1,
54			      struct timeval *tv2)
55{
56	return ((tv1->tv_sec - tv2->tv_sec) +
57		((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
58}
59
60void print_resource_track(ext2_resize_t rfs, struct resource_track *track,
61			  io_channel channel)
62{
63#ifdef HAVE_GETRUSAGE
64	struct rusage r;
65#endif
66#ifdef HAVE_MALLINFO
67	struct mallinfo	malloc_info;
68#endif
69	struct timeval time_end;
70
71	if ((rfs->flags & RESIZE_DEBUG_RTRACK) == 0)
72		return;
73
74	gettimeofday(&time_end, 0);
75
76	if (track->desc)
77		printf("%s: ", track->desc);
78
79#ifdef HAVE_MALLINFO
80#define kbytes(x)	(((unsigned long)(x) + 1023) / 1024)
81
82	malloc_info = mallinfo();
83	printf("Memory used: %luk/%luk (%luk/%luk), ",
84		kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
85		kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
86#else
87	printf("Memory used: %lu, ",
88		(unsigned long) (((char *) sbrk(0)) -
89				 ((char *) track->brk_start)));
90#endif
91#ifdef HAVE_GETRUSAGE
92	getrusage(RUSAGE_SELF, &r);
93
94	printf("time: %5.2f/%5.2f/%5.2f\n",
95		timeval_subtract(&time_end, &track->time_start),
96		timeval_subtract(&r.ru_utime, &track->user_start),
97		timeval_subtract(&r.ru_stime, &track->system_start));
98#else
99	printf("elapsed time: %6.3f\n",
100		timeval_subtract(&time_end, &track->time_start));
101#endif
102#define mbytes(x)	(((x) + 1048575) / 1048576)
103	if (channel && channel->manager && channel->manager->get_stats) {
104		io_stats delta = 0;
105		unsigned long long bytes_read = 0;
106		unsigned long long bytes_written = 0;
107
108		channel->manager->get_stats(channel, &delta);
109		if (delta) {
110			bytes_read = delta->bytes_read - track->bytes_read;
111			bytes_written = delta->bytes_written -
112				track->bytes_written;
113			if (bytes_read == 0 && bytes_written == 0)
114				goto skip_io;
115			if (track->desc)
116				printf("%s: ", track->desc);
117			printf("I/O read: %lluMB, write: %lluMB, "
118			       "rate: %.2fMB/s\n",
119			       mbytes(bytes_read),
120			       mbytes(bytes_written),
121			       (double)mbytes(bytes_read + bytes_written) /
122			       timeval_subtract(&time_end, &track->time_start));
123		}
124	}
125skip_io:
126	fflush(stdout);
127}
128
129