blob: 7ea231172c850db1a7eed7127d0bb8a036e56364 [file] [log] [blame]
Shailabh Nagara3baf642006-07-14 00:24:42 -07001/* getdelays.c
2 *
3 * Utility to get per-pid and per-tgid delay accounting statistics
4 * Also illustrates usage of the taskstats interface
5 *
6 * Copyright (C) Shailabh Nagar, IBM Corp. 2005
7 * Copyright (C) Balbir Singh, IBM Corp. 2006
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -07008 * Copyright (c) Jay Lan, SGI. 2006
Shailabh Nagara3baf642006-07-14 00:24:42 -07009 *
Andrew Mortond2f7bf12006-12-10 02:19:55 -080010 * Compile with
11 * gcc -I/usr/src/linux/include getdelays.c -o getdelays
Shailabh Nagara3baf642006-07-14 00:24:42 -070012 */
13
14#include <stdio.h>
15#include <stdlib.h>
16#include <errno.h>
17#include <unistd.h>
18#include <poll.h>
19#include <string.h>
20#include <fcntl.h>
21#include <sys/types.h>
22#include <sys/stat.h>
23#include <sys/socket.h>
Shailabh Nagara3baf642006-07-14 00:24:42 -070024#include <signal.h>
25
26#include <linux/genetlink.h>
27#include <linux/taskstats.h>
Balbir Singh546040d2007-11-14 16:59:14 -080028#include <linux/cgroupstats.h>
Shailabh Nagara3baf642006-07-14 00:24:42 -070029
30/*
31 * Generic macros for dealing with netlink sockets. Might be duplicated
32 * elsewhere. It is recommended that commercial grade applications use
33 * libnl or libnetlink and use the interfaces provided by the library
34 */
35#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN))
36#define GENLMSG_PAYLOAD(glh) (NLMSG_PAYLOAD(glh, 0) - GENL_HDRLEN)
37#define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN))
38#define NLA_PAYLOAD(len) (len - NLA_HDRLEN)
39
Andrew Mortond2f7bf12006-12-10 02:19:55 -080040#define err(code, fmt, arg...) \
41 do { \
42 fprintf(stderr, fmt, ##arg); \
43 exit(code); \
44 } while (0)
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070045
Andrew Mortond2f7bf12006-12-10 02:19:55 -080046int done;
47int rcvbufsz;
48char name[100];
49int dbg;
50int print_delays;
Andrew Mortoncf709842006-12-10 02:19:56 -080051int print_io_accounting;
Maxim Uvarovb663a792007-07-15 23:40:48 -070052int print_task_context_switch_counts;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070053__u64 stime, utime;
Andrew Mortond2f7bf12006-12-10 02:19:55 -080054
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070055#define PRINTF(fmt, arg...) { \
56 if (dbg) { \
57 printf(fmt, ##arg); \
58 } \
59 }
60
61/* Maximum size of response requested or message sent */
Oleg Nesterov88040232006-11-02 22:07:26 -080062#define MAX_MSG_SIZE 1024
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070063/* Maximum number of cpus expected to be specified in a cpumask */
64#define MAX_CPUS 32
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070065
66struct msgtemplate {
67 struct nlmsghdr n;
68 struct genlmsghdr g;
69 char buf[MAX_MSG_SIZE];
70};
71
72char cpumask[100+6*MAX_CPUS];
Shailabh Nagara3baf642006-07-14 00:24:42 -070073
Randy Dunlapf16825b2007-05-08 00:30:13 -070074static void usage(void)
75{
76 fprintf(stderr, "getdelays [-dilv] [-w logfile] [-r bufsize] "
77 "[-m cpumask] [-t tgid] [-p pid]\n");
78 fprintf(stderr, " -d: print delayacct stats\n");
79 fprintf(stderr, " -i: print IO accounting (works only with -p)\n");
80 fprintf(stderr, " -l: listen forever\n");
81 fprintf(stderr, " -v: debug on\n");
Balbir Singh546040d2007-11-14 16:59:14 -080082 fprintf(stderr, " -C: container path\n");
Randy Dunlapf16825b2007-05-08 00:30:13 -070083}
84
Shailabh Nagara3baf642006-07-14 00:24:42 -070085/*
86 * Create a raw netlink socket and bind
87 */
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070088static int create_nl_socket(int protocol)
Shailabh Nagara3baf642006-07-14 00:24:42 -070089{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070090 int fd;
91 struct sockaddr_nl local;
Shailabh Nagara3baf642006-07-14 00:24:42 -070092
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -070093 fd = socket(AF_NETLINK, SOCK_RAW, protocol);
94 if (fd < 0)
95 return -1;
96
97 if (rcvbufsz)
98 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
99 &rcvbufsz, sizeof(rcvbufsz)) < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800100 fprintf(stderr, "Unable to set socket rcv buf size "
101 "to %d\n",
102 rcvbufsz);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700103 return -1;
104 }
105
106 memset(&local, 0, sizeof(local));
107 local.nl_family = AF_NETLINK;
108
109 if (bind(fd, (struct sockaddr *) &local, sizeof(local)) < 0)
110 goto error;
111
112 return fd;
113error:
114 close(fd);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700115 return -1;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700116}
117
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700118
119int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
120 __u8 genl_cmd, __u16 nla_type,
121 void *nla_data, int nla_len)
Shailabh Nagara3baf642006-07-14 00:24:42 -0700122{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700123 struct nlattr *na;
124 struct sockaddr_nl nladdr;
125 int r, buflen;
126 char *buf;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700127
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700128 struct msgtemplate msg;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700129
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700130 msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
131 msg.n.nlmsg_type = nlmsg_type;
132 msg.n.nlmsg_flags = NLM_F_REQUEST;
133 msg.n.nlmsg_seq = 0;
134 msg.n.nlmsg_pid = nlmsg_pid;
135 msg.g.cmd = genl_cmd;
136 msg.g.version = 0x1;
137 na = (struct nlattr *) GENLMSG_DATA(&msg);
138 na->nla_type = nla_type;
139 na->nla_len = nla_len + 1 + NLA_HDRLEN;
140 memcpy(NLA_DATA(na), nla_data, nla_len);
141 msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);
142
143 buf = (char *) &msg;
144 buflen = msg.n.nlmsg_len ;
145 memset(&nladdr, 0, sizeof(nladdr));
146 nladdr.nl_family = AF_NETLINK;
147 while ((r = sendto(sd, buf, buflen, 0, (struct sockaddr *) &nladdr,
148 sizeof(nladdr))) < buflen) {
149 if (r > 0) {
150 buf += r;
151 buflen -= r;
152 } else if (errno != EAGAIN)
153 return -1;
154 }
155 return 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700156}
157
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700158
Shailabh Nagara3baf642006-07-14 00:24:42 -0700159/*
160 * Probe the controller in genetlink to find the family id
161 * for the TASKSTATS family
162 */
163int get_family_id(int sd)
164{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700165 struct {
166 struct nlmsghdr n;
167 struct genlmsghdr g;
168 char buf[256];
169 } ans;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700170
Randy Dunlap10e6f322008-02-08 04:21:56 -0800171 int id = 0, rc;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700172 struct nlattr *na;
173 int rep_len;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700174
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700175 strcpy(name, TASKSTATS_GENL_NAME);
176 rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY,
177 CTRL_ATTR_FAMILY_NAME, (void *)name,
178 strlen(TASKSTATS_GENL_NAME)+1);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700179
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700180 rep_len = recv(sd, &ans, sizeof(ans), 0);
181 if (ans.n.nlmsg_type == NLMSG_ERROR ||
182 (rep_len < 0) || !NLMSG_OK((&ans.n), rep_len))
183 return 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700184
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700185 na = (struct nlattr *) GENLMSG_DATA(&ans);
186 na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len));
187 if (na->nla_type == CTRL_ATTR_FAMILY_ID) {
188 id = *(__u16 *) NLA_DATA(na);
189 }
190 return id;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700191}
192
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700193void print_delayacct(struct taskstats *t)
Shailabh Nagara3baf642006-07-14 00:24:42 -0700194{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700195 printf("\n\nCPU %15s%15s%15s%15s\n"
196 " %15llu%15llu%15llu%15llu\n"
197 "IO %15s%15s\n"
198 " %15llu%15llu\n"
Keika Kobayashi9b0975a2008-07-25 01:48:54 -0700199 "SWAP %15s%15s\n"
200 " %15llu%15llu\n"
201 "RECLAIM %12s%15s\n"
Michael Neulingefbee7f2007-08-23 09:31:42 +1000202 " %15llu%15llu\n",
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700203 "count", "real total", "virtual total", "delay total",
Randy Dunlap66659312008-08-12 15:09:10 -0700204 (unsigned long long)t->cpu_count,
205 (unsigned long long)t->cpu_run_real_total,
206 (unsigned long long)t->cpu_run_virtual_total,
207 (unsigned long long)t->cpu_delay_total,
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700208 "count", "delay total",
Randy Dunlap66659312008-08-12 15:09:10 -0700209 (unsigned long long)t->blkio_count,
210 (unsigned long long)t->blkio_delay_total,
Keika Kobayashi9b0975a2008-07-25 01:48:54 -0700211 "count", "delay total",
Randy Dunlap66659312008-08-12 15:09:10 -0700212 (unsigned long long)t->swapin_count,
213 (unsigned long long)t->swapin_delay_total,
214 "count", "delay total",
215 (unsigned long long)t->freepages_count,
216 (unsigned long long)t->freepages_delay_total);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700217}
218
Maxim Uvarovb663a792007-07-15 23:40:48 -0700219void task_context_switch_counts(struct taskstats *t)
220{
221 printf("\n\nTask %15s%15s\n"
Randy Dunlap10e6f322008-02-08 04:21:56 -0800222 " %15llu%15llu\n",
Maxim Uvarovb663a792007-07-15 23:40:48 -0700223 "voluntary", "nonvoluntary",
Randy Dunlap66659312008-08-12 15:09:10 -0700224 (unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw);
Maxim Uvarovb663a792007-07-15 23:40:48 -0700225}
226
Balbir Singh546040d2007-11-14 16:59:14 -0800227void print_cgroupstats(struct cgroupstats *c)
228{
229 printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, "
Randy Dunlap66659312008-08-12 15:09:10 -0700230 "uninterruptible %llu\n", (unsigned long long)c->nr_sleeping,
231 (unsigned long long)c->nr_io_wait,
232 (unsigned long long)c->nr_running,
233 (unsigned long long)c->nr_stopped,
234 (unsigned long long)c->nr_uninterruptible);
Balbir Singh546040d2007-11-14 16:59:14 -0800235}
236
237
Andrew Mortoncf709842006-12-10 02:19:56 -0800238void print_ioacct(struct taskstats *t)
239{
240 printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n",
241 t->ac_comm,
242 (unsigned long long)t->read_bytes,
243 (unsigned long long)t->write_bytes,
244 (unsigned long long)t->cancelled_write_bytes);
245}
246
Shailabh Nagara3baf642006-07-14 00:24:42 -0700247int main(int argc, char *argv[])
248{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700249 int c, rc, rep_len, aggr_len, len2, cmd_type;
250 __u16 id;
251 __u32 mypid;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700252
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700253 struct nlattr *na;
254 int nl_sd = -1;
255 int len = 0;
256 pid_t tid = 0;
257 pid_t rtid = 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700258
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700259 int fd = 0;
260 int count = 0;
261 int write_file = 0;
262 int maskset = 0;
Scott Wiersdorf7f76c402007-05-08 00:30:25 -0700263 char *logfile = NULL;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700264 int loop = 0;
Balbir Singh546040d2007-11-14 16:59:14 -0800265 int containerset = 0;
266 char containerpath[1024];
267 int cfd = 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700268
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700269 struct msgtemplate msg;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700270
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700271 while (1) {
Balbir Singh546040d2007-11-14 16:59:14 -0800272 c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700273 if (c < 0)
274 break;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700275
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700276 switch (c) {
277 case 'd':
278 printf("print delayacct stats ON\n");
279 print_delays = 1;
280 break;
Andrew Mortoncf709842006-12-10 02:19:56 -0800281 case 'i':
282 printf("printing IO accounting\n");
283 print_io_accounting = 1;
284 break;
Maxim Uvarovb663a792007-07-15 23:40:48 -0700285 case 'q':
286 printf("printing task/process context switch rates\n");
287 print_task_context_switch_counts = 1;
288 break;
Balbir Singh546040d2007-11-14 16:59:14 -0800289 case 'C':
290 containerset = 1;
291 strncpy(containerpath, optarg, strlen(optarg) + 1);
292 break;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700293 case 'w':
Scott Wiersdorf7f76c402007-05-08 00:30:25 -0700294 logfile = strdup(optarg);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700295 printf("write to file %s\n", logfile);
296 write_file = 1;
297 break;
298 case 'r':
299 rcvbufsz = atoi(optarg);
300 printf("receive buf size %d\n", rcvbufsz);
301 if (rcvbufsz < 0)
302 err(1, "Invalid rcv buf size\n");
303 break;
304 case 'm':
305 strncpy(cpumask, optarg, sizeof(cpumask));
306 maskset = 1;
307 printf("cpumask %s maskset %d\n", cpumask, maskset);
308 break;
309 case 't':
310 tid = atoi(optarg);
311 if (!tid)
312 err(1, "Invalid tgid\n");
313 cmd_type = TASKSTATS_CMD_ATTR_TGID;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700314 break;
315 case 'p':
316 tid = atoi(optarg);
317 if (!tid)
318 err(1, "Invalid pid\n");
319 cmd_type = TASKSTATS_CMD_ATTR_PID;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700320 break;
321 case 'v':
322 printf("debug on\n");
323 dbg = 1;
324 break;
325 case 'l':
326 printf("listen forever\n");
327 loop = 1;
328 break;
329 default:
Randy Dunlapf16825b2007-05-08 00:30:13 -0700330 usage();
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700331 exit(-1);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700332 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700333 }
334
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700335 if (write_file) {
336 fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC,
337 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
338 if (fd == -1) {
339 perror("Cannot open output file\n");
340 exit(1);
341 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700342 }
343
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700344 if ((nl_sd = create_nl_socket(NETLINK_GENERIC)) < 0)
345 err(1, "error creating Netlink socket\n");
346
347
348 mypid = getpid();
349 id = get_family_id(nl_sd);
350 if (!id) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800351 fprintf(stderr, "Error getting family id, errno %d\n", errno);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700352 goto err;
353 }
354 PRINTF("family id %d\n", id);
355
356 if (maskset) {
357 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
358 TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700359 &cpumask, strlen(cpumask) + 1);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700360 PRINTF("Sent register cpumask, retval %d\n", rc);
361 if (rc < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800362 fprintf(stderr, "error sending register cpumask\n");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700363 goto err;
364 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700365 }
366
Balbir Singh546040d2007-11-14 16:59:14 -0800367 if (tid && containerset) {
368 fprintf(stderr, "Select either -t or -C, not both\n");
369 goto err;
370 }
371
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700372 if (tid) {
373 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
374 cmd_type, &tid, sizeof(__u32));
375 PRINTF("Sent pid/tgid, retval %d\n", rc);
376 if (rc < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800377 fprintf(stderr, "error sending tid/tgid cmd\n");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700378 goto done;
379 }
380 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700381
Balbir Singh546040d2007-11-14 16:59:14 -0800382 if (containerset) {
383 cfd = open(containerpath, O_RDONLY);
384 if (cfd < 0) {
385 perror("error opening container file");
386 goto err;
387 }
388 rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET,
389 CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32));
390 if (rc < 0) {
391 perror("error sending cgroupstats command");
392 goto err;
393 }
394 }
Marcus Meissner65a67bd2009-01-15 13:51:00 -0800395 if (!maskset && !tid && !containerset) {
396 usage();
397 goto err;
398 }
Balbir Singh546040d2007-11-14 16:59:14 -0800399
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700400 do {
401 int i;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700402
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700403 rep_len = recv(nl_sd, &msg, sizeof(msg), 0);
404 PRINTF("received %d bytes\n", rep_len);
405
406 if (rep_len < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800407 fprintf(stderr, "nonfatal reply error: errno %d\n",
408 errno);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700409 continue;
410 }
411 if (msg.n.nlmsg_type == NLMSG_ERROR ||
412 !NLMSG_OK((&msg.n), rep_len)) {
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700413 struct nlmsgerr *err = NLMSG_DATA(&msg);
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800414 fprintf(stderr, "fatal reply error, errno %d\n",
415 err->error);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700416 goto done;
417 }
418
Randy Dunlap10e6f322008-02-08 04:21:56 -0800419 PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n",
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700420 sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len);
421
422
423 rep_len = GENLMSG_PAYLOAD(&msg.n);
424
425 na = (struct nlattr *) GENLMSG_DATA(&msg);
426 len = 0;
427 i = 0;
428 while (len < rep_len) {
429 len += NLA_ALIGN(na->nla_len);
430 switch (na->nla_type) {
431 case TASKSTATS_TYPE_AGGR_TGID:
432 /* Fall through */
433 case TASKSTATS_TYPE_AGGR_PID:
434 aggr_len = NLA_PAYLOAD(na->nla_len);
435 len2 = 0;
436 /* For nested attributes, na follows */
437 na = (struct nlattr *) NLA_DATA(na);
438 done = 0;
439 while (len2 < aggr_len) {
440 switch (na->nla_type) {
441 case TASKSTATS_TYPE_PID:
442 rtid = *(int *) NLA_DATA(na);
443 if (print_delays)
444 printf("PID\t%d\n", rtid);
445 break;
446 case TASKSTATS_TYPE_TGID:
447 rtid = *(int *) NLA_DATA(na);
448 if (print_delays)
449 printf("TGID\t%d\n", rtid);
450 break;
451 case TASKSTATS_TYPE_STATS:
452 count++;
453 if (print_delays)
454 print_delayacct((struct taskstats *) NLA_DATA(na));
Andrew Mortoncf709842006-12-10 02:19:56 -0800455 if (print_io_accounting)
456 print_ioacct((struct taskstats *) NLA_DATA(na));
Maxim Uvarovb663a792007-07-15 23:40:48 -0700457 if (print_task_context_switch_counts)
458 task_context_switch_counts((struct taskstats *) NLA_DATA(na));
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700459 if (fd) {
460 if (write(fd, NLA_DATA(na), na->nla_len) < 0) {
461 err(1,"write error\n");
462 }
463 }
464 if (!loop)
465 goto done;
466 break;
467 default:
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800468 fprintf(stderr, "Unknown nested"
469 " nla_type %d\n",
470 na->nla_type);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700471 break;
472 }
473 len2 += NLA_ALIGN(na->nla_len);
474 na = (struct nlattr *) ((char *) na + len2);
475 }
476 break;
477
Balbir Singh546040d2007-11-14 16:59:14 -0800478 case CGROUPSTATS_TYPE_CGROUP_STATS:
479 print_cgroupstats(NLA_DATA(na));
480 break;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700481 default:
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800482 fprintf(stderr, "Unknown nla_type %d\n",
483 na->nla_type);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700484 break;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700485 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700486 na = (struct nlattr *) (GENLMSG_DATA(&msg) + len);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700487 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700488 } while (loop);
489done:
490 if (maskset) {
491 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
492 TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700493 &cpumask, strlen(cpumask) + 1);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700494 printf("Sent deregister mask, retval %d\n", rc);
495 if (rc < 0)
496 err(rc, "error sending deregister cpumask\n");
Shailabh Nagara3baf642006-07-14 00:24:42 -0700497 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700498err:
499 close(nl_sd);
500 if (fd)
501 close(fd);
Balbir Singh546040d2007-11-14 16:59:14 -0800502 if (cfd)
503 close(cfd);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700504 return 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700505}