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Message-Id: <a73182df44d0827ed6338c082a8ea16d6d2bd0b8.1474073857.git.shuahkh@osg.samsung.com>
Date: Mon, 19 Sep 2016 08:47:32 -0600
From: Shuah Khan <shuahkh@....samsung.com>
To: corbet@....net, sudeep.dutt@...el.com, ashutosh.dixit@...el.com,
tomas.winkler@...el.com, tglx@...utronix.de, wim@...ana.be,
linux@...ck-us.net, elfring@...rs.sourceforge.net,
nicolas.dichtel@...nd.com, davem@...emloft.net,
gregkh@...uxfoundation.org, dasaratharaman.chandramouli@...el.com,
maheshkhanwalkar@...il.com, mikedanese@...gle.com,
ben@...adent.org.uk, ghackmann@...gle.com
Cc: Shuah Khan <shuahkh@....samsung.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pcmcia@...ts.infradead.org,
linux-watchdog@...r.kernel.org
Subject: [PATCH 1/8] samples: move accounting example code from Documentation
Move accounting examples to samples and remove it from Documentation
Makefile. Create a new Makefile to build accounting. It can be built
from top level directory or from accounting directory:
Run make -C samples/accounting or cd samples/accounting; make
Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
Documentation/Makefile | 2 +-
Documentation/accounting/.gitignore | 1 -
Documentation/accounting/Makefile | 7 -
Documentation/accounting/getdelays.c | 550 -----------------------------------
samples/accounting/.gitignore | 1 +
samples/accounting/Makefile | 9 +
samples/accounting/getdelays.c | 550 +++++++++++++++++++++++++++++++++++
7 files changed, 561 insertions(+), 559 deletions(-)
delete mode 100644 Documentation/accounting/.gitignore
delete mode 100644 Documentation/accounting/Makefile
delete mode 100644 Documentation/accounting/getdelays.c
create mode 100644 samples/accounting/.gitignore
create mode 100644 samples/accounting/Makefile
create mode 100644 samples/accounting/getdelays.c
diff --git a/Documentation/Makefile b/Documentation/Makefile
index f530c29..58c6629 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,2 +1,2 @@
-subdir-y := accounting auxdisplay blackfin \
+subdir-y := auxdisplay blackfin \
laptops mic misc-devices pcmcia timers watchdog
diff --git a/Documentation/accounting/.gitignore b/Documentation/accounting/.gitignore
deleted file mode 100644
index 8648520..0000000
--- 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 7e232cb..0000000
--- 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/getdelays.c b/Documentation/accounting/getdelays.c
deleted file mode 100644
index b5ca536..0000000
--- 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 <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <poll.h>
-#include <string.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <signal.h>
-
-#include <linux/genetlink.h>
-#include <linux/taskstats.h>
-#include <linux/cgroupstats.h>
-
-/*
- * 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/samples/accounting/.gitignore b/samples/accounting/.gitignore
new file mode 100644
index 0000000..8648520
--- /dev/null
+++ b/samples/accounting/.gitignore
@@ -0,0 +1 @@
+getdelays
diff --git a/samples/accounting/Makefile b/samples/accounting/Makefile
new file mode 100644
index 0000000..647c94a
--- /dev/null
+++ b/samples/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/samples/accounting/getdelays.c b/samples/accounting/getdelays.c
new file mode 100644
index 0000000..b5ca536
--- /dev/null
+++ b/samples/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 <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <poll.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+#include <linux/genetlink.h>
+#include <linux/taskstats.h>
+#include <linux/cgroupstats.h>
+
+/*
+ * 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;
+}
--
2.7.4
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