resource_track.c revision e0ed7404719a9ddd2ba427a80db5365c8bad18c0 
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 "resize2fs.h"
14#include <time.h>
15#ifdef HAVE_MALLOC_H
16#include <malloc.h>
17#endif
18#include <sys/resource.h>
19
20void init_resource_track(struct resource_track *track, const char *desc,
21			 io_channel channel)
22{
23#ifdef HAVE_GETRUSAGE
24	struct rusage r;
25#endif
26	io_stats io_start = 0;
27
28	track->desc = desc;
29	track->brk_start = sbrk(0);
30	gettimeofday(&track->time_start, 0);
31#ifdef HAVE_GETRUSAGE
32#ifdef sun
33	memset(&r, 0, sizeof(struct rusage));
34#endif
35	getrusage(RUSAGE_SELF, &r);
36	track->user_start = r.ru_utime;
37	track->system_start = r.ru_stime;
38#else
39	track->user_start.tv_sec = track->user_start.tv_usec = 0;
40	track->system_start.tv_sec = track->system_start.tv_usec = 0;
41#endif
42	track->bytes_read = 0;
43	track->bytes_written = 0;
44	if (channel && channel->manager && channel->manager->get_stats)
45		channel->manager->get_stats(channel, &io_start);
46	if (io_start) {
47		track->bytes_read = io_start->bytes_read;
48		track->bytes_written = io_start->bytes_written;
49	}
50}
51
52static float timeval_subtract(struct timeval *tv1,
53			      struct timeval *tv2)
54{
55	return ((tv1->tv_sec - tv2->tv_sec) +
56		((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
57}
58
59void print_resource_track(ext2_resize_t rfs, struct resource_track *track,
60			  io_channel channel)
61{
62#ifdef HAVE_GETRUSAGE
63	struct rusage r;
64#endif
65#ifdef HAVE_MALLINFO
66	struct mallinfo	malloc_info;
67#endif
68	struct timeval time_end;
69
70	if ((rfs->flags & RESIZE_DEBUG_RTRACK) == 0)
71		return;
72
73	gettimeofday(&time_end, 0);
74
75	if (track->desc)
76		printf("%s: ", track->desc);
77
78#ifdef HAVE_MALLINFO
79#define kbytes(x)	(((unsigned long)(x) + 1023) / 1024)
80
81	malloc_info = mallinfo();
82	printf("Memory used: %luk/%luk (%luk/%luk), ",
83		kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
84		kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
85#else
86	printf("Memory used: %lu, ",
87		(unsigned long) (((char *) sbrk(0)) -
88				 ((char *) track->brk_start)));
89#endif
90#ifdef HAVE_GETRUSAGE
91	getrusage(RUSAGE_SELF, &r);
92
93	printf("time: %5.2f/%5.2f/%5.2f\n",
94		timeval_subtract(&time_end, &track->time_start),
95		timeval_subtract(&r.ru_utime, &track->user_start),
96		timeval_subtract(&r.ru_stime, &track->system_start));
97#else
98	printf("elapsed time: %6.3f\n",
99		timeval_subtract(&time_end, &track->time_start));
100#endif
101#define mbytes(x)	(((x) + 1048575) / 1048576)
102	if (channel && channel->manager && channel->manager->get_stats) {
103		io_stats delta = 0;
104		unsigned long long bytes_read = 0;
105		unsigned long long bytes_written = 0;
106
107		channel->manager->get_stats(channel, &delta);
108		if (delta) {
109			bytes_read = delta->bytes_read - track->bytes_read;
110			bytes_written = delta->bytes_written -
111				track->bytes_written;
112			if (bytes_read == 0 && bytes_written == 0)
113				goto skip_io;
114			if (track->desc)
115				printf("%s: ", track->desc);
116			printf("I/O read: %lluMB, write: %lluMB, "
117			       "rate: %.2fMB/s\n",
118			       mbytes(bytes_read),
119			       mbytes(bytes_written),
120			       (double)mbytes(bytes_read + bytes_written) /
121			       timeval_subtract(&time_end, &track->time_start));
122		}
123	}
124skip_io:
125	fflush(stdout);
126}
127
128