blob: 40121b5cca14cab3993000c53078ef2d8484f001 [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"
199 "MEM %15s%15s\n"
Michael Neulingefbee7f2007-08-23 09:31:42 +1000200 " %15llu%15llu\n",
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700201 "count", "real total", "virtual total", "delay total",
202 t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total,
203 t->cpu_delay_total,
204 "count", "delay total",
205 t->blkio_count, t->blkio_delay_total,
206 "count", "delay total", t->swapin_count, t->swapin_delay_total);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700207}
208
Maxim Uvarovb663a792007-07-15 23:40:48 -0700209void task_context_switch_counts(struct taskstats *t)
210{
211 printf("\n\nTask %15s%15s\n"
Randy Dunlap10e6f322008-02-08 04:21:56 -0800212 " %15llu%15llu\n",
Maxim Uvarovb663a792007-07-15 23:40:48 -0700213 "voluntary", "nonvoluntary",
214 t->nvcsw, t->nivcsw);
215}
216
Balbir Singh546040d2007-11-14 16:59:14 -0800217void print_cgroupstats(struct cgroupstats *c)
218{
219 printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, "
220 "uninterruptible %llu\n", c->nr_sleeping, c->nr_io_wait,
221 c->nr_running, c->nr_stopped, c->nr_uninterruptible);
222}
223
224
Andrew Mortoncf709842006-12-10 02:19:56 -0800225void print_ioacct(struct taskstats *t)
226{
227 printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n",
228 t->ac_comm,
229 (unsigned long long)t->read_bytes,
230 (unsigned long long)t->write_bytes,
231 (unsigned long long)t->cancelled_write_bytes);
232}
233
Shailabh Nagara3baf642006-07-14 00:24:42 -0700234int main(int argc, char *argv[])
235{
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700236 int c, rc, rep_len, aggr_len, len2, cmd_type;
237 __u16 id;
238 __u32 mypid;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700239
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700240 struct nlattr *na;
241 int nl_sd = -1;
242 int len = 0;
243 pid_t tid = 0;
244 pid_t rtid = 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700245
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700246 int fd = 0;
247 int count = 0;
248 int write_file = 0;
249 int maskset = 0;
Scott Wiersdorf7f76c402007-05-08 00:30:25 -0700250 char *logfile = NULL;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700251 int loop = 0;
Balbir Singh546040d2007-11-14 16:59:14 -0800252 int containerset = 0;
253 char containerpath[1024];
254 int cfd = 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700255
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700256 struct msgtemplate msg;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700257
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700258 while (1) {
Balbir Singh546040d2007-11-14 16:59:14 -0800259 c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700260 if (c < 0)
261 break;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700262
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700263 switch (c) {
264 case 'd':
265 printf("print delayacct stats ON\n");
266 print_delays = 1;
267 break;
Andrew Mortoncf709842006-12-10 02:19:56 -0800268 case 'i':
269 printf("printing IO accounting\n");
270 print_io_accounting = 1;
271 break;
Maxim Uvarovb663a792007-07-15 23:40:48 -0700272 case 'q':
273 printf("printing task/process context switch rates\n");
274 print_task_context_switch_counts = 1;
275 break;
Balbir Singh546040d2007-11-14 16:59:14 -0800276 case 'C':
277 containerset = 1;
278 strncpy(containerpath, optarg, strlen(optarg) + 1);
279 break;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700280 case 'w':
Scott Wiersdorf7f76c402007-05-08 00:30:25 -0700281 logfile = strdup(optarg);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700282 printf("write to file %s\n", logfile);
283 write_file = 1;
284 break;
285 case 'r':
286 rcvbufsz = atoi(optarg);
287 printf("receive buf size %d\n", rcvbufsz);
288 if (rcvbufsz < 0)
289 err(1, "Invalid rcv buf size\n");
290 break;
291 case 'm':
292 strncpy(cpumask, optarg, sizeof(cpumask));
293 maskset = 1;
294 printf("cpumask %s maskset %d\n", cpumask, maskset);
295 break;
296 case 't':
297 tid = atoi(optarg);
298 if (!tid)
299 err(1, "Invalid tgid\n");
300 cmd_type = TASKSTATS_CMD_ATTR_TGID;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700301 break;
302 case 'p':
303 tid = atoi(optarg);
304 if (!tid)
305 err(1, "Invalid pid\n");
306 cmd_type = TASKSTATS_CMD_ATTR_PID;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700307 break;
308 case 'v':
309 printf("debug on\n");
310 dbg = 1;
311 break;
312 case 'l':
313 printf("listen forever\n");
314 loop = 1;
315 break;
316 default:
Randy Dunlapf16825b2007-05-08 00:30:13 -0700317 usage();
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700318 exit(-1);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700319 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700320 }
321
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700322 if (write_file) {
323 fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC,
324 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
325 if (fd == -1) {
326 perror("Cannot open output file\n");
327 exit(1);
328 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700329 }
330
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700331 if ((nl_sd = create_nl_socket(NETLINK_GENERIC)) < 0)
332 err(1, "error creating Netlink socket\n");
333
334
335 mypid = getpid();
336 id = get_family_id(nl_sd);
337 if (!id) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800338 fprintf(stderr, "Error getting family id, errno %d\n", errno);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700339 goto err;
340 }
341 PRINTF("family id %d\n", id);
342
343 if (maskset) {
344 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
345 TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700346 &cpumask, strlen(cpumask) + 1);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700347 PRINTF("Sent register cpumask, retval %d\n", rc);
348 if (rc < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800349 fprintf(stderr, "error sending register cpumask\n");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700350 goto err;
351 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700352 }
353
Balbir Singh546040d2007-11-14 16:59:14 -0800354 if (tid && containerset) {
355 fprintf(stderr, "Select either -t or -C, not both\n");
356 goto err;
357 }
358
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700359 if (tid) {
360 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
361 cmd_type, &tid, sizeof(__u32));
362 PRINTF("Sent pid/tgid, retval %d\n", rc);
363 if (rc < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800364 fprintf(stderr, "error sending tid/tgid cmd\n");
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700365 goto done;
366 }
367 }
Shailabh Nagara3baf642006-07-14 00:24:42 -0700368
Balbir Singh546040d2007-11-14 16:59:14 -0800369 if (containerset) {
370 cfd = open(containerpath, O_RDONLY);
371 if (cfd < 0) {
372 perror("error opening container file");
373 goto err;
374 }
375 rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET,
376 CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32));
377 if (rc < 0) {
378 perror("error sending cgroupstats command");
379 goto err;
380 }
381 }
382
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700383 do {
384 int i;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700385
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700386 rep_len = recv(nl_sd, &msg, sizeof(msg), 0);
387 PRINTF("received %d bytes\n", rep_len);
388
389 if (rep_len < 0) {
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800390 fprintf(stderr, "nonfatal reply error: errno %d\n",
391 errno);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700392 continue;
393 }
394 if (msg.n.nlmsg_type == NLMSG_ERROR ||
395 !NLMSG_OK((&msg.n), rep_len)) {
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700396 struct nlmsgerr *err = NLMSG_DATA(&msg);
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800397 fprintf(stderr, "fatal reply error, errno %d\n",
398 err->error);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700399 goto done;
400 }
401
Randy Dunlap10e6f322008-02-08 04:21:56 -0800402 PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n",
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700403 sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len);
404
405
406 rep_len = GENLMSG_PAYLOAD(&msg.n);
407
408 na = (struct nlattr *) GENLMSG_DATA(&msg);
409 len = 0;
410 i = 0;
411 while (len < rep_len) {
412 len += NLA_ALIGN(na->nla_len);
413 switch (na->nla_type) {
414 case TASKSTATS_TYPE_AGGR_TGID:
415 /* Fall through */
416 case TASKSTATS_TYPE_AGGR_PID:
417 aggr_len = NLA_PAYLOAD(na->nla_len);
418 len2 = 0;
419 /* For nested attributes, na follows */
420 na = (struct nlattr *) NLA_DATA(na);
421 done = 0;
422 while (len2 < aggr_len) {
423 switch (na->nla_type) {
424 case TASKSTATS_TYPE_PID:
425 rtid = *(int *) NLA_DATA(na);
426 if (print_delays)
427 printf("PID\t%d\n", rtid);
428 break;
429 case TASKSTATS_TYPE_TGID:
430 rtid = *(int *) NLA_DATA(na);
431 if (print_delays)
432 printf("TGID\t%d\n", rtid);
433 break;
434 case TASKSTATS_TYPE_STATS:
435 count++;
436 if (print_delays)
437 print_delayacct((struct taskstats *) NLA_DATA(na));
Andrew Mortoncf709842006-12-10 02:19:56 -0800438 if (print_io_accounting)
439 print_ioacct((struct taskstats *) NLA_DATA(na));
Maxim Uvarovb663a792007-07-15 23:40:48 -0700440 if (print_task_context_switch_counts)
441 task_context_switch_counts((struct taskstats *) NLA_DATA(na));
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700442 if (fd) {
443 if (write(fd, NLA_DATA(na), na->nla_len) < 0) {
444 err(1,"write error\n");
445 }
446 }
447 if (!loop)
448 goto done;
449 break;
450 default:
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800451 fprintf(stderr, "Unknown nested"
452 " nla_type %d\n",
453 na->nla_type);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700454 break;
455 }
456 len2 += NLA_ALIGN(na->nla_len);
457 na = (struct nlattr *) ((char *) na + len2);
458 }
459 break;
460
Balbir Singh546040d2007-11-14 16:59:14 -0800461 case CGROUPSTATS_TYPE_CGROUP_STATS:
462 print_cgroupstats(NLA_DATA(na));
463 break;
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700464 default:
Andrew Mortond2f7bf12006-12-10 02:19:55 -0800465 fprintf(stderr, "Unknown nla_type %d\n",
466 na->nla_type);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700467 break;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700468 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700469 na = (struct nlattr *) (GENLMSG_DATA(&msg) + len);
Shailabh Nagara3baf642006-07-14 00:24:42 -0700470 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700471 } while (loop);
472done:
473 if (maskset) {
474 rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
475 TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
Balbir Singh7d1bdca2006-09-30 23:28:54 -0700476 &cpumask, strlen(cpumask) + 1);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700477 printf("Sent deregister mask, retval %d\n", rc);
478 if (rc < 0)
479 err(rc, "error sending deregister cpumask\n");
Shailabh Nagara3baf642006-07-14 00:24:42 -0700480 }
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700481err:
482 close(nl_sd);
483 if (fd)
484 close(fd);
Balbir Singh546040d2007-11-14 16:59:14 -0800485 if (cfd)
486 close(cfd);
Shailabh Nagar9e06d3f2006-07-14 00:24:45 -0700487 return 0;
Shailabh Nagara3baf642006-07-14 00:24:42 -0700488}