From d522b2cdfed853e372d6b64a89d070368f0718f7 Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Wed, 21 Sep 2016 16:19:35 -0600 Subject: tools: move accounting tool from Documentation Move accounting tool to tools and remove it from Documentation Makefile. Update location information for this tool. Create a new Makefile to build accounting. It can be built from top level directory or from accounting directory: Run make -C tools/accounting or cd tools/accounting; make Acked-by: Jonathan Corbet Signed-off-by: Shuah Khan --- Documentation/Makefile | 2 +- Documentation/accounting/.gitignore | 1 - Documentation/accounting/Makefile | 7 - Documentation/accounting/delay-accounting.txt | 6 +- Documentation/accounting/getdelays.c | 550 -------------------------- tools/accounting/.gitignore | 1 + tools/accounting/Makefile | 9 + tools/accounting/getdelays.c | 550 ++++++++++++++++++++++++++ 8 files changed, 564 insertions(+), 562 deletions(-) delete mode 100644 Documentation/accounting/.gitignore delete mode 100644 Documentation/accounting/Makefile delete mode 100644 Documentation/accounting/getdelays.c create mode 100644 tools/accounting/.gitignore create mode 100644 tools/accounting/Makefile create mode 100644 tools/accounting/getdelays.c diff --git a/Documentation/Makefile b/Documentation/Makefile index 0b8cd503224c..e4dd5e4614a4 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -1,2 +1,2 @@ -subdir-y := accounting blackfin \ +subdir-y := blackfin \ laptops pcmcia diff --git a/Documentation/accounting/.gitignore b/Documentation/accounting/.gitignore deleted file mode 100644 index 86485203c4ae..000000000000 --- a/Documentation/accounting/.gitignore +++ /dev/null @@ -1 +0,0 @@ -getdelays diff --git a/Documentation/accounting/Makefile b/Documentation/accounting/Makefile deleted file mode 100644 index 7e232cb6fd7d..000000000000 --- a/Documentation/accounting/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# List of programs to build -hostprogs-y := getdelays - -# Tell kbuild to always build the programs -always := $(hostprogs-y) - -HOSTCFLAGS_getdelays.o += -I$(objtree)/usr/include diff --git a/Documentation/accounting/delay-accounting.txt b/Documentation/accounting/delay-accounting.txt index 8a12f0730c94..042ea59b5853 100644 --- a/Documentation/accounting/delay-accounting.txt +++ b/Documentation/accounting/delay-accounting.txt @@ -54,9 +54,9 @@ are sent to userspace without requiring a command. If it is the last exiting task of a thread group, the per-tgid statistics are also sent. More details are given in the taskstats interface description. -The getdelays.c userspace utility in this directory allows simple commands to -be run and the corresponding delay statistics to be displayed. It also serves -as an example of using the taskstats interface. +The getdelays.c userspace utility in tools/accounting directory allows simple +commands to be run and the corresponding delay statistics to be displayed. It +also serves as an example of using the taskstats interface. Usage ----- diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c deleted file mode 100644 index b5ca536e56a8..000000000000 --- a/Documentation/accounting/getdelays.c +++ /dev/null @@ -1,550 +0,0 @@ -/* getdelays.c - * - * Utility to get per-pid and per-tgid delay accounting statistics - * Also illustrates usage of the taskstats interface - * - * Copyright (C) Shailabh Nagar, IBM Corp. 2005 - * Copyright (C) Balbir Singh, IBM Corp. 2006 - * Copyright (c) Jay Lan, SGI. 2006 - * - * Compile with - * gcc -I/usr/src/linux/include getdelays.c -o getdelays - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -/* - * Generic macros for dealing with netlink sockets. Might be duplicated - * elsewhere. It is recommended that commercial grade applications use - * libnl or libnetlink and use the interfaces provided by the library - */ -#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN)) -#define GENLMSG_PAYLOAD(glh) (NLMSG_PAYLOAD(glh, 0) - GENL_HDRLEN) -#define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN)) -#define NLA_PAYLOAD(len) (len - NLA_HDRLEN) - -#define err(code, fmt, arg...) \ - do { \ - fprintf(stderr, fmt, ##arg); \ - exit(code); \ - } while (0) - -int done; -int rcvbufsz; -char name[100]; -int dbg; -int print_delays; -int print_io_accounting; -int print_task_context_switch_counts; - -#define PRINTF(fmt, arg...) { \ - if (dbg) { \ - printf(fmt, ##arg); \ - } \ - } - -/* Maximum size of response requested or message sent */ -#define MAX_MSG_SIZE 1024 -/* Maximum number of cpus expected to be specified in a cpumask */ -#define MAX_CPUS 32 - -struct msgtemplate { - struct nlmsghdr n; - struct genlmsghdr g; - char buf[MAX_MSG_SIZE]; -}; - -char cpumask[100+6*MAX_CPUS]; - -static void usage(void) -{ - fprintf(stderr, "getdelays [-dilv] [-w logfile] [-r bufsize] " - "[-m cpumask] [-t tgid] [-p pid]\n"); - fprintf(stderr, " -d: print delayacct stats\n"); - fprintf(stderr, " -i: print IO accounting (works only with -p)\n"); - fprintf(stderr, " -l: listen forever\n"); - fprintf(stderr, " -v: debug on\n"); - fprintf(stderr, " -C: container path\n"); -} - -/* - * Create a raw netlink socket and bind - */ -static int create_nl_socket(int protocol) -{ - int fd; - struct sockaddr_nl local; - - fd = socket(AF_NETLINK, SOCK_RAW, protocol); - if (fd < 0) - return -1; - - if (rcvbufsz) - if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, - &rcvbufsz, sizeof(rcvbufsz)) < 0) { - fprintf(stderr, "Unable to set socket rcv buf size to %d\n", - rcvbufsz); - goto error; - } - - memset(&local, 0, sizeof(local)); - local.nl_family = AF_NETLINK; - - if (bind(fd, (struct sockaddr *) &local, sizeof(local)) < 0) - goto error; - - return fd; -error: - close(fd); - return -1; -} - - -static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, - __u8 genl_cmd, __u16 nla_type, - void *nla_data, int nla_len) -{ - struct nlattr *na; - struct sockaddr_nl nladdr; - int r, buflen; - char *buf; - - struct msgtemplate msg; - - msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN); - msg.n.nlmsg_type = nlmsg_type; - msg.n.nlmsg_flags = NLM_F_REQUEST; - msg.n.nlmsg_seq = 0; - msg.n.nlmsg_pid = nlmsg_pid; - msg.g.cmd = genl_cmd; - msg.g.version = 0x1; - na = (struct nlattr *) GENLMSG_DATA(&msg); - na->nla_type = nla_type; - na->nla_len = nla_len + 1 + NLA_HDRLEN; - memcpy(NLA_DATA(na), nla_data, nla_len); - msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len); - - buf = (char *) &msg; - buflen = msg.n.nlmsg_len ; - memset(&nladdr, 0, sizeof(nladdr)); - nladdr.nl_family = AF_NETLINK; - while ((r = sendto(sd, buf, buflen, 0, (struct sockaddr *) &nladdr, - sizeof(nladdr))) < buflen) { - if (r > 0) { - buf += r; - buflen -= r; - } else if (errno != EAGAIN) - return -1; - } - return 0; -} - - -/* - * Probe the controller in genetlink to find the family id - * for the TASKSTATS family - */ -static int get_family_id(int sd) -{ - struct { - struct nlmsghdr n; - struct genlmsghdr g; - char buf[256]; - } ans; - - int id = 0, rc; - struct nlattr *na; - int rep_len; - - strcpy(name, TASKSTATS_GENL_NAME); - rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY, - CTRL_ATTR_FAMILY_NAME, (void *)name, - strlen(TASKSTATS_GENL_NAME)+1); - if (rc < 0) - return 0; /* sendto() failure? */ - - rep_len = recv(sd, &ans, sizeof(ans), 0); - if (ans.n.nlmsg_type == NLMSG_ERROR || - (rep_len < 0) || !NLMSG_OK((&ans.n), rep_len)) - return 0; - - na = (struct nlattr *) GENLMSG_DATA(&ans); - na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len)); - if (na->nla_type == CTRL_ATTR_FAMILY_ID) { - id = *(__u16 *) NLA_DATA(na); - } - return id; -} - -#define average_ms(t, c) (t / 1000000ULL / (c ? c : 1)) - -static void print_delayacct(struct taskstats *t) -{ - printf("\n\nCPU %15s%15s%15s%15s%15s\n" - " %15llu%15llu%15llu%15llu%15.3fms\n" - "IO %15s%15s%15s\n" - " %15llu%15llu%15llums\n" - "SWAP %15s%15s%15s\n" - " %15llu%15llu%15llums\n" - "RECLAIM %12s%15s%15s\n" - " %15llu%15llu%15llums\n", - "count", "real total", "virtual total", - "delay total", "delay average", - (unsigned long long)t->cpu_count, - (unsigned long long)t->cpu_run_real_total, - (unsigned long long)t->cpu_run_virtual_total, - (unsigned long long)t->cpu_delay_total, - average_ms((double)t->cpu_delay_total, t->cpu_count), - "count", "delay total", "delay average", - (unsigned long long)t->blkio_count, - (unsigned long long)t->blkio_delay_total, - average_ms(t->blkio_delay_total, t->blkio_count), - "count", "delay total", "delay average", - (unsigned long long)t->swapin_count, - (unsigned long long)t->swapin_delay_total, - average_ms(t->swapin_delay_total, t->swapin_count), - "count", "delay total", "delay average", - (unsigned long long)t->freepages_count, - (unsigned long long)t->freepages_delay_total, - average_ms(t->freepages_delay_total, t->freepages_count)); -} - -static void task_context_switch_counts(struct taskstats *t) -{ - printf("\n\nTask %15s%15s\n" - " %15llu%15llu\n", - "voluntary", "nonvoluntary", - (unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw); -} - -static void print_cgroupstats(struct cgroupstats *c) -{ - printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, " - "uninterruptible %llu\n", (unsigned long long)c->nr_sleeping, - (unsigned long long)c->nr_io_wait, - (unsigned long long)c->nr_running, - (unsigned long long)c->nr_stopped, - (unsigned long long)c->nr_uninterruptible); -} - - -static void print_ioacct(struct taskstats *t) -{ - printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n", - t->ac_comm, - (unsigned long long)t->read_bytes, - (unsigned long long)t->write_bytes, - (unsigned long long)t->cancelled_write_bytes); -} - -int main(int argc, char *argv[]) -{ - int c, rc, rep_len, aggr_len, len2; - int cmd_type = TASKSTATS_CMD_ATTR_UNSPEC; - __u16 id; - __u32 mypid; - - struct nlattr *na; - int nl_sd = -1; - int len = 0; - pid_t tid = 0; - pid_t rtid = 0; - - int fd = 0; - int count = 0; - int write_file = 0; - int maskset = 0; - char *logfile = NULL; - int loop = 0; - int containerset = 0; - char *containerpath = NULL; - int cfd = 0; - int forking = 0; - sigset_t sigset; - - struct msgtemplate msg; - - while (!forking) { - c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:c:"); - if (c < 0) - break; - - switch (c) { - case 'd': - printf("print delayacct stats ON\n"); - print_delays = 1; - break; - case 'i': - printf("printing IO accounting\n"); - print_io_accounting = 1; - break; - case 'q': - printf("printing task/process context switch rates\n"); - print_task_context_switch_counts = 1; - break; - case 'C': - containerset = 1; - containerpath = optarg; - break; - case 'w': - logfile = strdup(optarg); - printf("write to file %s\n", logfile); - write_file = 1; - break; - case 'r': - rcvbufsz = atoi(optarg); - printf("receive buf size %d\n", rcvbufsz); - if (rcvbufsz < 0) - err(1, "Invalid rcv buf size\n"); - break; - case 'm': - strncpy(cpumask, optarg, sizeof(cpumask)); - cpumask[sizeof(cpumask) - 1] = '\0'; - maskset = 1; - printf("cpumask %s maskset %d\n", cpumask, maskset); - break; - case 't': - tid = atoi(optarg); - if (!tid) - err(1, "Invalid tgid\n"); - cmd_type = TASKSTATS_CMD_ATTR_TGID; - break; - case 'p': - tid = atoi(optarg); - if (!tid) - err(1, "Invalid pid\n"); - cmd_type = TASKSTATS_CMD_ATTR_PID; - break; - case 'c': - - /* Block SIGCHLD for sigwait() later */ - if (sigemptyset(&sigset) == -1) - err(1, "Failed to empty sigset"); - if (sigaddset(&sigset, SIGCHLD)) - err(1, "Failed to set sigchld in sigset"); - sigprocmask(SIG_BLOCK, &sigset, NULL); - - /* fork/exec a child */ - tid = fork(); - if (tid < 0) - err(1, "Fork failed\n"); - if (tid == 0) - if (execvp(argv[optind - 1], - &argv[optind - 1]) < 0) - exit(-1); - - /* Set the command type and avoid further processing */ - cmd_type = TASKSTATS_CMD_ATTR_PID; - forking = 1; - break; - case 'v': - printf("debug on\n"); - dbg = 1; - break; - case 'l': - printf("listen forever\n"); - loop = 1; - break; - default: - usage(); - exit(-1); - } - } - - if (write_file) { - fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC, - S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); - if (fd == -1) { - perror("Cannot open output file\n"); - exit(1); - } - } - - nl_sd = create_nl_socket(NETLINK_GENERIC); - if (nl_sd < 0) - err(1, "error creating Netlink socket\n"); - - - mypid = getpid(); - id = get_family_id(nl_sd); - if (!id) { - fprintf(stderr, "Error getting family id, errno %d\n", errno); - goto err; - } - PRINTF("family id %d\n", id); - - if (maskset) { - rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, - TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, - &cpumask, strlen(cpumask) + 1); - PRINTF("Sent register cpumask, retval %d\n", rc); - if (rc < 0) { - fprintf(stderr, "error sending register cpumask\n"); - goto err; - } - } - - if (tid && containerset) { - fprintf(stderr, "Select either -t or -C, not both\n"); - goto err; - } - - /* - * If we forked a child, wait for it to exit. Cannot use waitpid() - * as all the delicious data would be reaped as part of the wait - */ - if (tid && forking) { - int sig_received; - sigwait(&sigset, &sig_received); - } - - if (tid) { - rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, - cmd_type, &tid, sizeof(__u32)); - PRINTF("Sent pid/tgid, retval %d\n", rc); - if (rc < 0) { - fprintf(stderr, "error sending tid/tgid cmd\n"); - goto done; - } - } - - if (containerset) { - cfd = open(containerpath, O_RDONLY); - if (cfd < 0) { - perror("error opening container file"); - goto err; - } - rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET, - CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32)); - if (rc < 0) { - perror("error sending cgroupstats command"); - goto err; - } - } - if (!maskset && !tid && !containerset) { - usage(); - goto err; - } - - do { - rep_len = recv(nl_sd, &msg, sizeof(msg), 0); - PRINTF("received %d bytes\n", rep_len); - - if (rep_len < 0) { - fprintf(stderr, "nonfatal reply error: errno %d\n", - errno); - continue; - } - if (msg.n.nlmsg_type == NLMSG_ERROR || - !NLMSG_OK((&msg.n), rep_len)) { - struct nlmsgerr *err = NLMSG_DATA(&msg); - fprintf(stderr, "fatal reply error, errno %d\n", - err->error); - goto done; - } - - PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n", - sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len); - - - rep_len = GENLMSG_PAYLOAD(&msg.n); - - na = (struct nlattr *) GENLMSG_DATA(&msg); - len = 0; - while (len < rep_len) { - len += NLA_ALIGN(na->nla_len); - switch (na->nla_type) { - case TASKSTATS_TYPE_AGGR_TGID: - /* Fall through */ - case TASKSTATS_TYPE_AGGR_PID: - aggr_len = NLA_PAYLOAD(na->nla_len); - len2 = 0; - /* For nested attributes, na follows */ - na = (struct nlattr *) NLA_DATA(na); - done = 0; - while (len2 < aggr_len) { - switch (na->nla_type) { - case TASKSTATS_TYPE_PID: - rtid = *(int *) NLA_DATA(na); - if (print_delays) - printf("PID\t%d\n", rtid); - break; - case TASKSTATS_TYPE_TGID: - rtid = *(int *) NLA_DATA(na); - if (print_delays) - printf("TGID\t%d\n", rtid); - break; - case TASKSTATS_TYPE_STATS: - count++; - if (print_delays) - print_delayacct((struct taskstats *) NLA_DATA(na)); - if (print_io_accounting) - print_ioacct((struct taskstats *) NLA_DATA(na)); - if (print_task_context_switch_counts) - task_context_switch_counts((struct taskstats *) NLA_DATA(na)); - if (fd) { - if (write(fd, NLA_DATA(na), na->nla_len) < 0) { - err(1,"write error\n"); - } - } - if (!loop) - goto done; - break; - case TASKSTATS_TYPE_NULL: - break; - default: - fprintf(stderr, "Unknown nested" - " nla_type %d\n", - na->nla_type); - break; - } - len2 += NLA_ALIGN(na->nla_len); - na = (struct nlattr *)((char *)na + - NLA_ALIGN(na->nla_len)); - } - break; - - case CGROUPSTATS_TYPE_CGROUP_STATS: - print_cgroupstats(NLA_DATA(na)); - break; - default: - fprintf(stderr, "Unknown nla_type %d\n", - na->nla_type); - case TASKSTATS_TYPE_NULL: - break; - } - na = (struct nlattr *) (GENLMSG_DATA(&msg) + len); - } - } while (loop); -done: - if (maskset) { - rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, - TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, - &cpumask, strlen(cpumask) + 1); - printf("Sent deregister mask, retval %d\n", rc); - if (rc < 0) - err(rc, "error sending deregister cpumask\n"); - } -err: - close(nl_sd); - if (fd) - close(fd); - if (cfd) - close(cfd); - return 0; -} diff --git a/tools/accounting/.gitignore b/tools/accounting/.gitignore new file mode 100644 index 000000000000..86485203c4ae --- /dev/null +++ b/tools/accounting/.gitignore @@ -0,0 +1 @@ +getdelays diff --git a/tools/accounting/Makefile b/tools/accounting/Makefile new file mode 100644 index 000000000000..647c94a219bf --- /dev/null +++ b/tools/accounting/Makefile @@ -0,0 +1,9 @@ +CC := $(CROSS_COMPILE)gcc +CFLAGS := -I../../usr/include + +PROGS := getdelays + +all: $(PROGS) + +clean: + rm -fr $(PROGS) diff --git a/tools/accounting/getdelays.c b/tools/accounting/getdelays.c new file mode 100644 index 000000000000..b5ca536e56a8 --- /dev/null +++ b/tools/accounting/getdelays.c @@ -0,0 +1,550 @@ +/* getdelays.c + * + * Utility to get per-pid and per-tgid delay accounting statistics + * Also illustrates usage of the taskstats interface + * + * Copyright (C) Shailabh Nagar, IBM Corp. 2005 + * Copyright (C) Balbir Singh, IBM Corp. 2006 + * Copyright (c) Jay Lan, SGI. 2006 + * + * Compile with + * gcc -I/usr/src/linux/include getdelays.c -o getdelays + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/* + * Generic macros for dealing with netlink sockets. Might be duplicated + * elsewhere. It is recommended that commercial grade applications use + * libnl or libnetlink and use the interfaces provided by the library + */ +#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN)) +#define GENLMSG_PAYLOAD(glh) (NLMSG_PAYLOAD(glh, 0) - GENL_HDRLEN) +#define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN)) +#define NLA_PAYLOAD(len) (len - NLA_HDRLEN) + +#define err(code, fmt, arg...) \ + do { \ + fprintf(stderr, fmt, ##arg); \ + exit(code); \ + } while (0) + +int done; +int rcvbufsz; +char name[100]; +int dbg; +int print_delays; +int print_io_accounting; +int print_task_context_switch_counts; + +#define PRINTF(fmt, arg...) { \ + if (dbg) { \ + printf(fmt, ##arg); \ + } \ + } + +/* Maximum size of response requested or message sent */ +#define MAX_MSG_SIZE 1024 +/* Maximum number of cpus expected to be specified in a cpumask */ +#define MAX_CPUS 32 + +struct msgtemplate { + struct nlmsghdr n; + struct genlmsghdr g; + char buf[MAX_MSG_SIZE]; +}; + +char cpumask[100+6*MAX_CPUS]; + +static void usage(void) +{ + fprintf(stderr, "getdelays [-dilv] [-w logfile] [-r bufsize] " + "[-m cpumask] [-t tgid] [-p pid]\n"); + fprintf(stderr, " -d: print delayacct stats\n"); + fprintf(stderr, " -i: print IO accounting (works only with -p)\n"); + fprintf(stderr, " -l: listen forever\n"); + fprintf(stderr, " -v: debug on\n"); + fprintf(stderr, " -C: container path\n"); +} + +/* + * Create a raw netlink socket and bind + */ +static int create_nl_socket(int protocol) +{ + int fd; + struct sockaddr_nl local; + + fd = socket(AF_NETLINK, SOCK_RAW, protocol); + if (fd < 0) + return -1; + + if (rcvbufsz) + if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, + &rcvbufsz, sizeof(rcvbufsz)) < 0) { + fprintf(stderr, "Unable to set socket rcv buf size to %d\n", + rcvbufsz); + goto error; + } + + memset(&local, 0, sizeof(local)); + local.nl_family = AF_NETLINK; + + if (bind(fd, (struct sockaddr *) &local, sizeof(local)) < 0) + goto error; + + return fd; +error: + close(fd); + return -1; +} + + +static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, + __u8 genl_cmd, __u16 nla_type, + void *nla_data, int nla_len) +{ + struct nlattr *na; + struct sockaddr_nl nladdr; + int r, buflen; + char *buf; + + struct msgtemplate msg; + + msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN); + msg.n.nlmsg_type = nlmsg_type; + msg.n.nlmsg_flags = NLM_F_REQUEST; + msg.n.nlmsg_seq = 0; + msg.n.nlmsg_pid = nlmsg_pid; + msg.g.cmd = genl_cmd; + msg.g.version = 0x1; + na = (struct nlattr *) GENLMSG_DATA(&msg); + na->nla_type = nla_type; + na->nla_len = nla_len + 1 + NLA_HDRLEN; + memcpy(NLA_DATA(na), nla_data, nla_len); + msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len); + + buf = (char *) &msg; + buflen = msg.n.nlmsg_len ; + memset(&nladdr, 0, sizeof(nladdr)); + nladdr.nl_family = AF_NETLINK; + while ((r = sendto(sd, buf, buflen, 0, (struct sockaddr *) &nladdr, + sizeof(nladdr))) < buflen) { + if (r > 0) { + buf += r; + buflen -= r; + } else if (errno != EAGAIN) + return -1; + } + return 0; +} + + +/* + * Probe the controller in genetlink to find the family id + * for the TASKSTATS family + */ +static int get_family_id(int sd) +{ + struct { + struct nlmsghdr n; + struct genlmsghdr g; + char buf[256]; + } ans; + + int id = 0, rc; + struct nlattr *na; + int rep_len; + + strcpy(name, TASKSTATS_GENL_NAME); + rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY, + CTRL_ATTR_FAMILY_NAME, (void *)name, + strlen(TASKSTATS_GENL_NAME)+1); + if (rc < 0) + return 0; /* sendto() failure? */ + + rep_len = recv(sd, &ans, sizeof(ans), 0); + if (ans.n.nlmsg_type == NLMSG_ERROR || + (rep_len < 0) || !NLMSG_OK((&ans.n), rep_len)) + return 0; + + na = (struct nlattr *) GENLMSG_DATA(&ans); + na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len)); + if (na->nla_type == CTRL_ATTR_FAMILY_ID) { + id = *(__u16 *) NLA_DATA(na); + } + return id; +} + +#define average_ms(t, c) (t / 1000000ULL / (c ? c : 1)) + +static void print_delayacct(struct taskstats *t) +{ + printf("\n\nCPU %15s%15s%15s%15s%15s\n" + " %15llu%15llu%15llu%15llu%15.3fms\n" + "IO %15s%15s%15s\n" + " %15llu%15llu%15llums\n" + "SWAP %15s%15s%15s\n" + " %15llu%15llu%15llums\n" + "RECLAIM %12s%15s%15s\n" + " %15llu%15llu%15llums\n", + "count", "real total", "virtual total", + "delay total", "delay average", + (unsigned long long)t->cpu_count, + (unsigned long long)t->cpu_run_real_total, + (unsigned long long)t->cpu_run_virtual_total, + (unsigned long long)t->cpu_delay_total, + average_ms((double)t->cpu_delay_total, t->cpu_count), + "count", "delay total", "delay average", + (unsigned long long)t->blkio_count, + (unsigned long long)t->blkio_delay_total, + average_ms(t->blkio_delay_total, t->blkio_count), + "count", "delay total", "delay average", + (unsigned long long)t->swapin_count, + (unsigned long long)t->swapin_delay_total, + average_ms(t->swapin_delay_total, t->swapin_count), + "count", "delay total", "delay average", + (unsigned long long)t->freepages_count, + (unsigned long long)t->freepages_delay_total, + average_ms(t->freepages_delay_total, t->freepages_count)); +} + +static void task_context_switch_counts(struct taskstats *t) +{ + printf("\n\nTask %15s%15s\n" + " %15llu%15llu\n", + "voluntary", "nonvoluntary", + (unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw); +} + +static void print_cgroupstats(struct cgroupstats *c) +{ + printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, " + "uninterruptible %llu\n", (unsigned long long)c->nr_sleeping, + (unsigned long long)c->nr_io_wait, + (unsigned long long)c->nr_running, + (unsigned long long)c->nr_stopped, + (unsigned long long)c->nr_uninterruptible); +} + + +static void print_ioacct(struct taskstats *t) +{ + printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n", + t->ac_comm, + (unsigned long long)t->read_bytes, + (unsigned long long)t->write_bytes, + (unsigned long long)t->cancelled_write_bytes); +} + +int main(int argc, char *argv[]) +{ + int c, rc, rep_len, aggr_len, len2; + int cmd_type = TASKSTATS_CMD_ATTR_UNSPEC; + __u16 id; + __u32 mypid; + + struct nlattr *na; + int nl_sd = -1; + int len = 0; + pid_t tid = 0; + pid_t rtid = 0; + + int fd = 0; + int count = 0; + int write_file = 0; + int maskset = 0; + char *logfile = NULL; + int loop = 0; + int containerset = 0; + char *containerpath = NULL; + int cfd = 0; + int forking = 0; + sigset_t sigset; + + struct msgtemplate msg; + + while (!forking) { + c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:c:"); + if (c < 0) + break; + + switch (c) { + case 'd': + printf("print delayacct stats ON\n"); + print_delays = 1; + break; + case 'i': + printf("printing IO accounting\n"); + print_io_accounting = 1; + break; + case 'q': + printf("printing task/process context switch rates\n"); + print_task_context_switch_counts = 1; + break; + case 'C': + containerset = 1; + containerpath = optarg; + break; + case 'w': + logfile = strdup(optarg); + printf("write to file %s\n", logfile); + write_file = 1; + break; + case 'r': + rcvbufsz = atoi(optarg); + printf("receive buf size %d\n", rcvbufsz); + if (rcvbufsz < 0) + err(1, "Invalid rcv buf size\n"); + break; + case 'm': + strncpy(cpumask, optarg, sizeof(cpumask)); + cpumask[sizeof(cpumask) - 1] = '\0'; + maskset = 1; + printf("cpumask %s maskset %d\n", cpumask, maskset); + break; + case 't': + tid = atoi(optarg); + if (!tid) + err(1, "Invalid tgid\n"); + cmd_type = TASKSTATS_CMD_ATTR_TGID; + break; + case 'p': + tid = atoi(optarg); + if (!tid) + err(1, "Invalid pid\n"); + cmd_type = TASKSTATS_CMD_ATTR_PID; + break; + case 'c': + + /* Block SIGCHLD for sigwait() later */ + if (sigemptyset(&sigset) == -1) + err(1, "Failed to empty sigset"); + if (sigaddset(&sigset, SIGCHLD)) + err(1, "Failed to set sigchld in sigset"); + sigprocmask(SIG_BLOCK, &sigset, NULL); + + /* fork/exec a child */ + tid = fork(); + if (tid < 0) + err(1, "Fork failed\n"); + if (tid == 0) + if (execvp(argv[optind - 1], + &argv[optind - 1]) < 0) + exit(-1); + + /* Set the command type and avoid further processing */ + cmd_type = TASKSTATS_CMD_ATTR_PID; + forking = 1; + break; + case 'v': + printf("debug on\n"); + dbg = 1; + break; + case 'l': + printf("listen forever\n"); + loop = 1; + break; + default: + usage(); + exit(-1); + } + } + + if (write_file) { + fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + if (fd == -1) { + perror("Cannot open output file\n"); + exit(1); + } + } + + nl_sd = create_nl_socket(NETLINK_GENERIC); + if (nl_sd < 0) + err(1, "error creating Netlink socket\n"); + + + mypid = getpid(); + id = get_family_id(nl_sd); + if (!id) { + fprintf(stderr, "Error getting family id, errno %d\n", errno); + goto err; + } + PRINTF("family id %d\n", id); + + if (maskset) { + rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, + TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, + &cpumask, strlen(cpumask) + 1); + PRINTF("Sent register cpumask, retval %d\n", rc); + if (rc < 0) { + fprintf(stderr, "error sending register cpumask\n"); + goto err; + } + } + + if (tid && containerset) { + fprintf(stderr, "Select either -t or -C, not both\n"); + goto err; + } + + /* + * If we forked a child, wait for it to exit. Cannot use waitpid() + * as all the delicious data would be reaped as part of the wait + */ + if (tid && forking) { + int sig_received; + sigwait(&sigset, &sig_received); + } + + if (tid) { + rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, + cmd_type, &tid, sizeof(__u32)); + PRINTF("Sent pid/tgid, retval %d\n", rc); + if (rc < 0) { + fprintf(stderr, "error sending tid/tgid cmd\n"); + goto done; + } + } + + if (containerset) { + cfd = open(containerpath, O_RDONLY); + if (cfd < 0) { + perror("error opening container file"); + goto err; + } + rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET, + CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32)); + if (rc < 0) { + perror("error sending cgroupstats command"); + goto err; + } + } + if (!maskset && !tid && !containerset) { + usage(); + goto err; + } + + do { + rep_len = recv(nl_sd, &msg, sizeof(msg), 0); + PRINTF("received %d bytes\n", rep_len); + + if (rep_len < 0) { + fprintf(stderr, "nonfatal reply error: errno %d\n", + errno); + continue; + } + if (msg.n.nlmsg_type == NLMSG_ERROR || + !NLMSG_OK((&msg.n), rep_len)) { + struct nlmsgerr *err = NLMSG_DATA(&msg); + fprintf(stderr, "fatal reply error, errno %d\n", + err->error); + goto done; + } + + PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n", + sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len); + + + rep_len = GENLMSG_PAYLOAD(&msg.n); + + na = (struct nlattr *) GENLMSG_DATA(&msg); + len = 0; + while (len < rep_len) { + len += NLA_ALIGN(na->nla_len); + switch (na->nla_type) { + case TASKSTATS_TYPE_AGGR_TGID: + /* Fall through */ + case TASKSTATS_TYPE_AGGR_PID: + aggr_len = NLA_PAYLOAD(na->nla_len); + len2 = 0; + /* For nested attributes, na follows */ + na = (struct nlattr *) NLA_DATA(na); + done = 0; + while (len2 < aggr_len) { + switch (na->nla_type) { + case TASKSTATS_TYPE_PID: + rtid = *(int *) NLA_DATA(na); + if (print_delays) + printf("PID\t%d\n", rtid); + break; + case TASKSTATS_TYPE_TGID: + rtid = *(int *) NLA_DATA(na); + if (print_delays) + printf("TGID\t%d\n", rtid); + break; + case TASKSTATS_TYPE_STATS: + count++; + if (print_delays) + print_delayacct((struct taskstats *) NLA_DATA(na)); + if (print_io_accounting) + print_ioacct((struct taskstats *) NLA_DATA(na)); + if (print_task_context_switch_counts) + task_context_switch_counts((struct taskstats *) NLA_DATA(na)); + if (fd) { + if (write(fd, NLA_DATA(na), na->nla_len) < 0) { + err(1,"write error\n"); + } + } + if (!loop) + goto done; + break; + case TASKSTATS_TYPE_NULL: + break; + default: + fprintf(stderr, "Unknown nested" + " nla_type %d\n", + na->nla_type); + break; + } + len2 += NLA_ALIGN(na->nla_len); + na = (struct nlattr *)((char *)na + + NLA_ALIGN(na->nla_len)); + } + break; + + case CGROUPSTATS_TYPE_CGROUP_STATS: + print_cgroupstats(NLA_DATA(na)); + break; + default: + fprintf(stderr, "Unknown nla_type %d\n", + na->nla_type); + case TASKSTATS_TYPE_NULL: + break; + } + na = (struct nlattr *) (GENLMSG_DATA(&msg) + len); + } + } while (loop); +done: + if (maskset) { + rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, + TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, + &cpumask, strlen(cpumask) + 1); + printf("Sent deregister mask, retval %d\n", rc); + if (rc < 0) + err(rc, "error sending deregister cpumask\n"); + } +err: + close(nl_sd); + if (fd) + close(fd); + if (cfd) + close(cfd); + return 0; +} -- cgit v1.2.3