Commit | Line | Data |
---|---|---|
a3baf649 SN |
1 | /* 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 | |
9e06d3f9 | 8 | * Copyright (c) Jay Lan, SGI. 2006 |
a3baf649 | 9 | * |
d2f7bf13 AM |
10 | * Compile with |
11 | * gcc -I/usr/src/linux/include getdelays.c -o getdelays | |
a3baf649 SN |
12 | */ |
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> | |
db9e5679 | 24 | #include <sys/wait.h> |
a3baf649 SN |
25 | #include <signal.h> |
26 | ||
27 | #include <linux/genetlink.h> | |
28 | #include <linux/taskstats.h> | |
546040dc | 29 | #include <linux/cgroupstats.h> |
a3baf649 SN |
30 | |
31 | /* | |
32 | * Generic macros for dealing with netlink sockets. Might be duplicated | |
33 | * elsewhere. It is recommended that commercial grade applications use | |
34 | * libnl or libnetlink and use the interfaces provided by the library | |
35 | */ | |
36 | #define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN)) | |
37 | #define GENLMSG_PAYLOAD(glh) (NLMSG_PAYLOAD(glh, 0) - GENL_HDRLEN) | |
38 | #define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN)) | |
39 | #define NLA_PAYLOAD(len) (len - NLA_HDRLEN) | |
40 | ||
d2f7bf13 AM |
41 | #define err(code, fmt, arg...) \ |
42 | do { \ | |
43 | fprintf(stderr, fmt, ##arg); \ | |
44 | exit(code); \ | |
45 | } while (0) | |
46 | ||
47 | int done; | |
48 | int rcvbufsz; | |
49 | char name[100]; | |
50 | int dbg; | |
51 | int print_delays; | |
cf709844 | 52 | int print_io_accounting; |
b663a79c | 53 | int print_task_context_switch_counts; |
d2f7bf13 | 54 | |
9e06d3f9 SN |
55 | #define PRINTF(fmt, arg...) { \ |
56 | if (dbg) { \ | |
57 | printf(fmt, ##arg); \ | |
58 | } \ | |
59 | } | |
60 | ||
61 | /* Maximum size of response requested or message sent */ | |
88040230 | 62 | #define MAX_MSG_SIZE 1024 |
9e06d3f9 SN |
63 | /* Maximum number of cpus expected to be specified in a cpumask */ |
64 | #define MAX_CPUS 32 | |
9e06d3f9 SN |
65 | |
66 | struct msgtemplate { | |
67 | struct nlmsghdr n; | |
68 | struct genlmsghdr g; | |
69 | char buf[MAX_MSG_SIZE]; | |
70 | }; | |
71 | ||
72 | char cpumask[100+6*MAX_CPUS]; | |
a3baf649 | 73 | |
f16825bb RD |
74 | static 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"); | |
546040dc | 82 | fprintf(stderr, " -C: container path\n"); |
f16825bb RD |
83 | } |
84 | ||
a3baf649 SN |
85 | /* |
86 | * Create a raw netlink socket and bind | |
87 | */ | |
9e06d3f9 | 88 | static int create_nl_socket(int protocol) |
a3baf649 | 89 | { |
9e06d3f9 SN |
90 | int fd; |
91 | struct sockaddr_nl local; | |
92 | ||
93 | 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) { | |
0de4b954 | 100 | fprintf(stderr, "Unable to set socket rcv buf size to %d\n", |
d2f7bf13 | 101 | rcvbufsz); |
0de4b954 | 102 | goto error; |
9e06d3f9 | 103 | } |
a3baf649 | 104 | |
9e06d3f9 SN |
105 | memset(&local, 0, sizeof(local)); |
106 | local.nl_family = AF_NETLINK; | |
a3baf649 | 107 | |
9e06d3f9 SN |
108 | if (bind(fd, (struct sockaddr *) &local, sizeof(local)) < 0) |
109 | goto error; | |
a3baf649 | 110 | |
9e06d3f9 SN |
111 | return fd; |
112 | error: | |
113 | close(fd); | |
114 | return -1; | |
a3baf649 SN |
115 | } |
116 | ||
9e06d3f9 | 117 | |
b7ed698c | 118 | static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, |
9e06d3f9 SN |
119 | __u8 genl_cmd, __u16 nla_type, |
120 | void *nla_data, int nla_len) | |
a3baf649 | 121 | { |
9e06d3f9 SN |
122 | struct nlattr *na; |
123 | struct sockaddr_nl nladdr; | |
124 | int r, buflen; | |
125 | char *buf; | |
126 | ||
127 | struct msgtemplate msg; | |
128 | ||
129 | msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN); | |
130 | msg.n.nlmsg_type = nlmsg_type; | |
131 | msg.n.nlmsg_flags = NLM_F_REQUEST; | |
132 | msg.n.nlmsg_seq = 0; | |
133 | msg.n.nlmsg_pid = nlmsg_pid; | |
134 | msg.g.cmd = genl_cmd; | |
135 | msg.g.version = 0x1; | |
136 | na = (struct nlattr *) GENLMSG_DATA(&msg); | |
137 | na->nla_type = nla_type; | |
138 | na->nla_len = nla_len + 1 + NLA_HDRLEN; | |
139 | memcpy(NLA_DATA(na), nla_data, nla_len); | |
140 | msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len); | |
141 | ||
142 | buf = (char *) &msg; | |
143 | buflen = msg.n.nlmsg_len ; | |
144 | memset(&nladdr, 0, sizeof(nladdr)); | |
145 | nladdr.nl_family = AF_NETLINK; | |
146 | while ((r = sendto(sd, buf, buflen, 0, (struct sockaddr *) &nladdr, | |
147 | sizeof(nladdr))) < buflen) { | |
148 | if (r > 0) { | |
149 | buf += r; | |
150 | buflen -= r; | |
151 | } else if (errno != EAGAIN) | |
152 | return -1; | |
153 | } | |
154 | return 0; | |
a3baf649 SN |
155 | } |
156 | ||
9e06d3f9 | 157 | |
a3baf649 SN |
158 | /* |
159 | * Probe the controller in genetlink to find the family id | |
160 | * for the TASKSTATS family | |
161 | */ | |
b7ed698c | 162 | static int get_family_id(int sd) |
a3baf649 | 163 | { |
9e06d3f9 SN |
164 | struct { |
165 | struct nlmsghdr n; | |
166 | struct genlmsghdr g; | |
167 | char buf[256]; | |
168 | } ans; | |
169 | ||
10e6f32b | 170 | int id = 0, rc; |
9e06d3f9 SN |
171 | struct nlattr *na; |
172 | int rep_len; | |
173 | ||
174 | strcpy(name, TASKSTATS_GENL_NAME); | |
175 | rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY, | |
176 | CTRL_ATTR_FAMILY_NAME, (void *)name, | |
177 | strlen(TASKSTATS_GENL_NAME)+1); | |
4ed960b1 AM |
178 | if (rc < 0) |
179 | return 0; /* sendto() failure? */ | |
9e06d3f9 SN |
180 | |
181 | rep_len = recv(sd, &ans, sizeof(ans), 0); | |
182 | if (ans.n.nlmsg_type == NLMSG_ERROR || | |
183 | (rep_len < 0) || !NLMSG_OK((&ans.n), rep_len)) | |
184 | return 0; | |
a3baf649 | 185 | |
9e06d3f9 SN |
186 | na = (struct nlattr *) GENLMSG_DATA(&ans); |
187 | na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len)); | |
188 | if (na->nla_type == CTRL_ATTR_FAMILY_ID) { | |
189 | id = *(__u16 *) NLA_DATA(na); | |
190 | } | |
191 | return id; | |
a3baf649 SN |
192 | } |
193 | ||
02d54f09 WF |
194 | #define average_ms(t, c) (t / 1000000ULL / (c ? c : 1)) |
195 | ||
b7ed698c | 196 | static void print_delayacct(struct taskstats *t) |
a3baf649 | 197 | { |
02d54f09 WF |
198 | printf("\n\nCPU %15s%15s%15s%15s%15s\n" |
199 | " %15llu%15llu%15llu%15llu%15.3fms\n" | |
200 | "IO %15s%15s%15s\n" | |
201 | " %15llu%15llu%15llums\n" | |
202 | "SWAP %15s%15s%15s\n" | |
203 | " %15llu%15llu%15llums\n" | |
204 | "RECLAIM %12s%15s%15s\n" | |
205 | " %15llu%15llu%15llums\n", | |
206 | "count", "real total", "virtual total", | |
207 | "delay total", "delay average", | |
66659313 RD |
208 | (unsigned long long)t->cpu_count, |
209 | (unsigned long long)t->cpu_run_real_total, | |
210 | (unsigned long long)t->cpu_run_virtual_total, | |
211 | (unsigned long long)t->cpu_delay_total, | |
02d54f09 WF |
212 | average_ms((double)t->cpu_delay_total, t->cpu_count), |
213 | "count", "delay total", "delay average", | |
66659313 RD |
214 | (unsigned long long)t->blkio_count, |
215 | (unsigned long long)t->blkio_delay_total, | |
02d54f09 WF |
216 | average_ms(t->blkio_delay_total, t->blkio_count), |
217 | "count", "delay total", "delay average", | |
66659313 RD |
218 | (unsigned long long)t->swapin_count, |
219 | (unsigned long long)t->swapin_delay_total, | |
02d54f09 WF |
220 | average_ms(t->swapin_delay_total, t->swapin_count), |
221 | "count", "delay total", "delay average", | |
66659313 | 222 | (unsigned long long)t->freepages_count, |
02d54f09 WF |
223 | (unsigned long long)t->freepages_delay_total, |
224 | average_ms(t->freepages_delay_total, t->freepages_count)); | |
a3baf649 SN |
225 | } |
226 | ||
b7ed698c | 227 | static void task_context_switch_counts(struct taskstats *t) |
b663a79c MU |
228 | { |
229 | printf("\n\nTask %15s%15s\n" | |
10e6f32b | 230 | " %15llu%15llu\n", |
b663a79c | 231 | "voluntary", "nonvoluntary", |
66659313 | 232 | (unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw); |
b663a79c MU |
233 | } |
234 | ||
b7ed698c | 235 | static void print_cgroupstats(struct cgroupstats *c) |
546040dc BS |
236 | { |
237 | printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, " | |
66659313 RD |
238 | "uninterruptible %llu\n", (unsigned long long)c->nr_sleeping, |
239 | (unsigned long long)c->nr_io_wait, | |
240 | (unsigned long long)c->nr_running, | |
241 | (unsigned long long)c->nr_stopped, | |
242 | (unsigned long long)c->nr_uninterruptible); | |
546040dc BS |
243 | } |
244 | ||
245 | ||
b7ed698c | 246 | static void print_ioacct(struct taskstats *t) |
cf709844 AM |
247 | { |
248 | printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n", | |
249 | t->ac_comm, | |
250 | (unsigned long long)t->read_bytes, | |
251 | (unsigned long long)t->write_bytes, | |
252 | (unsigned long long)t->cancelled_write_bytes); | |
253 | } | |
254 | ||
a3baf649 SN |
255 | int main(int argc, char *argv[]) |
256 | { | |
b8d9a865 JSR |
257 | int c, rc, rep_len, aggr_len, len2; |
258 | int cmd_type = TASKSTATS_CMD_ATTR_UNSPEC; | |
9e06d3f9 SN |
259 | __u16 id; |
260 | __u32 mypid; | |
261 | ||
262 | struct nlattr *na; | |
263 | int nl_sd = -1; | |
264 | int len = 0; | |
265 | pid_t tid = 0; | |
266 | pid_t rtid = 0; | |
267 | ||
268 | int fd = 0; | |
269 | int count = 0; | |
270 | int write_file = 0; | |
271 | int maskset = 0; | |
7f76c403 | 272 | char *logfile = NULL; |
9e06d3f9 | 273 | int loop = 0; |
546040dc | 274 | int containerset = 0; |
8da01af4 | 275 | char *containerpath = NULL; |
546040dc | 276 | int cfd = 0; |
db9e5679 MG |
277 | int forking = 0; |
278 | sigset_t sigset; | |
9e06d3f9 SN |
279 | |
280 | struct msgtemplate msg; | |
281 | ||
db9e5679 MG |
282 | while (!forking) { |
283 | c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:c:"); | |
9e06d3f9 SN |
284 | if (c < 0) |
285 | break; | |
a3baf649 | 286 | |
9e06d3f9 SN |
287 | switch (c) { |
288 | case 'd': | |
289 | printf("print delayacct stats ON\n"); | |
290 | print_delays = 1; | |
291 | break; | |
cf709844 AM |
292 | case 'i': |
293 | printf("printing IO accounting\n"); | |
294 | print_io_accounting = 1; | |
295 | break; | |
b663a79c MU |
296 | case 'q': |
297 | printf("printing task/process context switch rates\n"); | |
298 | print_task_context_switch_counts = 1; | |
299 | break; | |
546040dc BS |
300 | case 'C': |
301 | containerset = 1; | |
8da01af4 | 302 | containerpath = optarg; |
546040dc | 303 | break; |
9e06d3f9 | 304 | case 'w': |
7f76c403 | 305 | logfile = strdup(optarg); |
9e06d3f9 SN |
306 | printf("write to file %s\n", logfile); |
307 | write_file = 1; | |
308 | break; | |
309 | case 'r': | |
310 | rcvbufsz = atoi(optarg); | |
311 | printf("receive buf size %d\n", rcvbufsz); | |
312 | if (rcvbufsz < 0) | |
313 | err(1, "Invalid rcv buf size\n"); | |
314 | break; | |
315 | case 'm': | |
316 | strncpy(cpumask, optarg, sizeof(cpumask)); | |
88e15ce4 | 317 | cpumask[sizeof(cpumask) - 1] = '\0'; |
9e06d3f9 SN |
318 | maskset = 1; |
319 | printf("cpumask %s maskset %d\n", cpumask, maskset); | |
320 | break; | |
321 | case 't': | |
322 | tid = atoi(optarg); | |
323 | if (!tid) | |
324 | err(1, "Invalid tgid\n"); | |
325 | cmd_type = TASKSTATS_CMD_ATTR_TGID; | |
9e06d3f9 SN |
326 | break; |
327 | case 'p': | |
328 | tid = atoi(optarg); | |
329 | if (!tid) | |
330 | err(1, "Invalid pid\n"); | |
331 | cmd_type = TASKSTATS_CMD_ATTR_PID; | |
9e06d3f9 | 332 | break; |
db9e5679 MG |
333 | case 'c': |
334 | ||
335 | /* Block SIGCHLD for sigwait() later */ | |
336 | if (sigemptyset(&sigset) == -1) | |
337 | err(1, "Failed to empty sigset"); | |
338 | if (sigaddset(&sigset, SIGCHLD)) | |
339 | err(1, "Failed to set sigchld in sigset"); | |
340 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
341 | ||
342 | /* fork/exec a child */ | |
343 | tid = fork(); | |
344 | if (tid < 0) | |
345 | err(1, "Fork failed\n"); | |
346 | if (tid == 0) | |
347 | if (execvp(argv[optind - 1], | |
348 | &argv[optind - 1]) < 0) | |
349 | exit(-1); | |
350 | ||
351 | /* Set the command type and avoid further processing */ | |
352 | cmd_type = TASKSTATS_CMD_ATTR_PID; | |
353 | forking = 1; | |
354 | break; | |
9e06d3f9 SN |
355 | case 'v': |
356 | printf("debug on\n"); | |
357 | dbg = 1; | |
358 | break; | |
359 | case 'l': | |
360 | printf("listen forever\n"); | |
361 | loop = 1; | |
362 | break; | |
363 | default: | |
f16825bb | 364 | usage(); |
9e06d3f9 | 365 | exit(-1); |
a3baf649 | 366 | } |
a3baf649 | 367 | } |
a3baf649 | 368 | |
9e06d3f9 SN |
369 | if (write_file) { |
370 | fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC, | |
371 | S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); | |
372 | if (fd == -1) { | |
373 | perror("Cannot open output file\n"); | |
374 | exit(1); | |
375 | } | |
376 | } | |
a3baf649 | 377 | |
9e06d3f9 SN |
378 | if ((nl_sd = create_nl_socket(NETLINK_GENERIC)) < 0) |
379 | err(1, "error creating Netlink socket\n"); | |
a3baf649 | 380 | |
a3baf649 | 381 | |
9e06d3f9 SN |
382 | mypid = getpid(); |
383 | id = get_family_id(nl_sd); | |
384 | if (!id) { | |
d2f7bf13 | 385 | fprintf(stderr, "Error getting family id, errno %d\n", errno); |
9e06d3f9 | 386 | goto err; |
a3baf649 | 387 | } |
9e06d3f9 SN |
388 | PRINTF("family id %d\n", id); |
389 | ||
390 | if (maskset) { | |
391 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
392 | TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, | |
7d1bdca9 | 393 | &cpumask, strlen(cpumask) + 1); |
9e06d3f9 SN |
394 | PRINTF("Sent register cpumask, retval %d\n", rc); |
395 | if (rc < 0) { | |
d2f7bf13 | 396 | fprintf(stderr, "error sending register cpumask\n"); |
9e06d3f9 SN |
397 | goto err; |
398 | } | |
a3baf649 SN |
399 | } |
400 | ||
546040dc BS |
401 | if (tid && containerset) { |
402 | fprintf(stderr, "Select either -t or -C, not both\n"); | |
403 | goto err; | |
404 | } | |
405 | ||
db9e5679 MG |
406 | /* |
407 | * If we forked a child, wait for it to exit. Cannot use waitpid() | |
408 | * as all the delicious data would be reaped as part of the wait | |
409 | */ | |
410 | if (tid && forking) { | |
411 | int sig_received; | |
412 | sigwait(&sigset, &sig_received); | |
413 | } | |
414 | ||
9e06d3f9 SN |
415 | if (tid) { |
416 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
417 | cmd_type, &tid, sizeof(__u32)); | |
418 | PRINTF("Sent pid/tgid, retval %d\n", rc); | |
419 | if (rc < 0) { | |
d2f7bf13 | 420 | fprintf(stderr, "error sending tid/tgid cmd\n"); |
9e06d3f9 SN |
421 | goto done; |
422 | } | |
a3baf649 SN |
423 | } |
424 | ||
546040dc BS |
425 | if (containerset) { |
426 | cfd = open(containerpath, O_RDONLY); | |
427 | if (cfd < 0) { | |
428 | perror("error opening container file"); | |
429 | goto err; | |
430 | } | |
431 | rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET, | |
432 | CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32)); | |
433 | if (rc < 0) { | |
434 | perror("error sending cgroupstats command"); | |
435 | goto err; | |
436 | } | |
437 | } | |
65a67bd2 MM |
438 | if (!maskset && !tid && !containerset) { |
439 | usage(); | |
440 | goto err; | |
441 | } | |
546040dc | 442 | |
9e06d3f9 | 443 | do { |
9e06d3f9 SN |
444 | rep_len = recv(nl_sd, &msg, sizeof(msg), 0); |
445 | PRINTF("received %d bytes\n", rep_len); | |
a3baf649 | 446 | |
9e06d3f9 | 447 | if (rep_len < 0) { |
d2f7bf13 AM |
448 | fprintf(stderr, "nonfatal reply error: errno %d\n", |
449 | errno); | |
9e06d3f9 SN |
450 | continue; |
451 | } | |
452 | if (msg.n.nlmsg_type == NLMSG_ERROR || | |
453 | !NLMSG_OK((&msg.n), rep_len)) { | |
7d1bdca9 | 454 | struct nlmsgerr *err = NLMSG_DATA(&msg); |
d2f7bf13 AM |
455 | fprintf(stderr, "fatal reply error, errno %d\n", |
456 | err->error); | |
9e06d3f9 SN |
457 | goto done; |
458 | } | |
459 | ||
10e6f32b | 460 | PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n", |
9e06d3f9 SN |
461 | sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len); |
462 | ||
463 | ||
464 | rep_len = GENLMSG_PAYLOAD(&msg.n); | |
465 | ||
466 | na = (struct nlattr *) GENLMSG_DATA(&msg); | |
467 | len = 0; | |
9e06d3f9 SN |
468 | while (len < rep_len) { |
469 | len += NLA_ALIGN(na->nla_len); | |
470 | switch (na->nla_type) { | |
471 | case TASKSTATS_TYPE_AGGR_TGID: | |
472 | /* Fall through */ | |
473 | case TASKSTATS_TYPE_AGGR_PID: | |
474 | aggr_len = NLA_PAYLOAD(na->nla_len); | |
475 | len2 = 0; | |
476 | /* For nested attributes, na follows */ | |
477 | na = (struct nlattr *) NLA_DATA(na); | |
478 | done = 0; | |
479 | while (len2 < aggr_len) { | |
480 | switch (na->nla_type) { | |
481 | case TASKSTATS_TYPE_PID: | |
482 | rtid = *(int *) NLA_DATA(na); | |
483 | if (print_delays) | |
484 | printf("PID\t%d\n", rtid); | |
485 | break; | |
486 | case TASKSTATS_TYPE_TGID: | |
487 | rtid = *(int *) NLA_DATA(na); | |
488 | if (print_delays) | |
489 | printf("TGID\t%d\n", rtid); | |
490 | break; | |
491 | case TASKSTATS_TYPE_STATS: | |
492 | count++; | |
493 | if (print_delays) | |
494 | print_delayacct((struct taskstats *) NLA_DATA(na)); | |
cf709844 AM |
495 | if (print_io_accounting) |
496 | print_ioacct((struct taskstats *) NLA_DATA(na)); | |
b663a79c MU |
497 | if (print_task_context_switch_counts) |
498 | task_context_switch_counts((struct taskstats *) NLA_DATA(na)); | |
9e06d3f9 SN |
499 | if (fd) { |
500 | if (write(fd, NLA_DATA(na), na->nla_len) < 0) { | |
501 | err(1,"write error\n"); | |
502 | } | |
503 | } | |
504 | if (!loop) | |
505 | goto done; | |
506 | break; | |
507 | default: | |
d2f7bf13 AM |
508 | fprintf(stderr, "Unknown nested" |
509 | " nla_type %d\n", | |
510 | na->nla_type); | |
9e06d3f9 SN |
511 | break; |
512 | } | |
513 | len2 += NLA_ALIGN(na->nla_len); | |
514 | na = (struct nlattr *) ((char *) na + len2); | |
515 | } | |
516 | break; | |
517 | ||
546040dc BS |
518 | case CGROUPSTATS_TYPE_CGROUP_STATS: |
519 | print_cgroupstats(NLA_DATA(na)); | |
520 | break; | |
9e06d3f9 | 521 | default: |
d2f7bf13 AM |
522 | fprintf(stderr, "Unknown nla_type %d\n", |
523 | na->nla_type); | |
4be2c95d | 524 | case TASKSTATS_TYPE_NULL: |
9e06d3f9 | 525 | break; |
a3baf649 | 526 | } |
9e06d3f9 | 527 | na = (struct nlattr *) (GENLMSG_DATA(&msg) + len); |
a3baf649 | 528 | } |
9e06d3f9 SN |
529 | } while (loop); |
530 | done: | |
531 | if (maskset) { | |
532 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
533 | TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, | |
7d1bdca9 | 534 | &cpumask, strlen(cpumask) + 1); |
9e06d3f9 SN |
535 | printf("Sent deregister mask, retval %d\n", rc); |
536 | if (rc < 0) | |
537 | err(rc, "error sending deregister cpumask\n"); | |
a3baf649 | 538 | } |
9e06d3f9 SN |
539 | err: |
540 | close(nl_sd); | |
541 | if (fd) | |
542 | close(fd); | |
546040dc BS |
543 | if (cfd) |
544 | close(cfd); | |
9e06d3f9 | 545 | return 0; |
a3baf649 | 546 | } |