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-rw-r--r--Documentation/accounting/getdelays.c66
-rw-r--r--Documentation/accounting/taskstats.txt10
2 files changed, 52 insertions, 24 deletions
diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c
index b11792abd6b..e9126e794ed 100644
--- a/Documentation/accounting/getdelays.c
+++ b/Documentation/accounting/getdelays.c
@@ -7,6 +7,8 @@
* 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>
@@ -35,13 +37,20 @@
#define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN))
#define NLA_PAYLOAD(len) (len - NLA_HDRLEN)
-#define err(code, fmt, arg...) do { printf(fmt, ##arg); exit(code); } while (0)
-int done = 0;
-int rcvbufsz=0;
-
- char name[100];
-int dbg=0, print_delays=0;
+#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;
__u64 stime, utime;
+
#define PRINTF(fmt, arg...) { \
if (dbg) { \
printf(fmt, ##arg); \
@@ -49,7 +58,7 @@ __u64 stime, utime;
}
/* Maximum size of response requested or message sent */
-#define MAX_MSG_SIZE 256
+#define MAX_MSG_SIZE 1024
/* Maximum number of cpus expected to be specified in a cpumask */
#define MAX_CPUS 32
/* Maximum length of pathname to log file */
@@ -78,8 +87,9 @@ static int create_nl_socket(int protocol)
if (rcvbufsz)
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
&rcvbufsz, sizeof(rcvbufsz)) < 0) {
- printf("Unable to set socket rcv buf size to %d\n",
- rcvbufsz);
+ fprintf(stderr, "Unable to set socket rcv buf size "
+ "to %d\n",
+ rcvbufsz);
return -1;
}
@@ -186,6 +196,15 @@ void print_delayacct(struct taskstats *t)
"count", "delay total", t->swapin_count, t->swapin_delay_total);
}
+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, cmd_type;
@@ -208,7 +227,7 @@ int main(int argc, char *argv[])
struct msgtemplate msg;
while (1) {
- c = getopt(argc, argv, "dw:r:m:t:p:v:l");
+ c = getopt(argc, argv, "diw:r:m:t:p:v:l");
if (c < 0)
break;
@@ -217,6 +236,10 @@ int main(int argc, char *argv[])
printf("print delayacct stats ON\n");
print_delays = 1;
break;
+ case 'i':
+ printf("printing IO accounting\n");
+ print_io_accounting = 1;
+ break;
case 'w':
strncpy(logfile, optarg, MAX_FILENAME);
printf("write to file %s\n", logfile);
@@ -238,14 +261,12 @@ int main(int argc, char *argv[])
if (!tid)
err(1, "Invalid tgid\n");
cmd_type = TASKSTATS_CMD_ATTR_TGID;
- print_delays = 1;
break;
case 'p':
tid = atoi(optarg);
if (!tid)
err(1, "Invalid pid\n");
cmd_type = TASKSTATS_CMD_ATTR_PID;
- print_delays = 1;
break;
case 'v':
printf("debug on\n");
@@ -277,7 +298,7 @@ int main(int argc, char *argv[])
mypid = getpid();
id = get_family_id(nl_sd);
if (!id) {
- printf("Error getting family id, errno %d", errno);
+ fprintf(stderr, "Error getting family id, errno %d\n", errno);
goto err;
}
PRINTF("family id %d\n", id);
@@ -288,7 +309,7 @@ int main(int argc, char *argv[])
&cpumask, strlen(cpumask) + 1);
PRINTF("Sent register cpumask, retval %d\n", rc);
if (rc < 0) {
- printf("error sending register cpumask\n");
+ fprintf(stderr, "error sending register cpumask\n");
goto err;
}
}
@@ -298,7 +319,7 @@ int main(int argc, char *argv[])
cmd_type, &tid, sizeof(__u32));
PRINTF("Sent pid/tgid, retval %d\n", rc);
if (rc < 0) {
- printf("error sending tid/tgid cmd\n");
+ fprintf(stderr, "error sending tid/tgid cmd\n");
goto done;
}
}
@@ -310,13 +331,15 @@ int main(int argc, char *argv[])
PRINTF("received %d bytes\n", rep_len);
if (rep_len < 0) {
- printf("nonfatal reply error: errno %d\n", errno);
+ 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);
- printf("fatal reply error, errno %d\n", err->error);
+ fprintf(stderr, "fatal reply error, errno %d\n",
+ err->error);
goto done;
}
@@ -356,6 +379,8 @@ int main(int argc, char *argv[])
count++;
if (print_delays)
print_delayacct((struct taskstats *) NLA_DATA(na));
+ if (print_io_accounting)
+ print_ioacct((struct taskstats *) NLA_DATA(na));
if (fd) {
if (write(fd, NLA_DATA(na), na->nla_len) < 0) {
err(1,"write error\n");
@@ -365,7 +390,9 @@ int main(int argc, char *argv[])
goto done;
break;
default:
- printf("Unknown nested nla_type %d\n", na->nla_type);
+ fprintf(stderr, "Unknown nested"
+ " nla_type %d\n",
+ na->nla_type);
break;
}
len2 += NLA_ALIGN(na->nla_len);
@@ -374,7 +401,8 @@ int main(int argc, char *argv[])
break;
default:
- printf("Unknown nla_type %d\n", na->nla_type);
+ fprintf(stderr, "Unknown nla_type %d\n",
+ na->nla_type);
break;
}
na = (struct nlattr *) (GENLMSG_DATA(&msg) + len);
diff --git a/Documentation/accounting/taskstats.txt b/Documentation/accounting/taskstats.txt
index 92ebf29e904..ff06b738bb8 100644
--- a/Documentation/accounting/taskstats.txt
+++ b/Documentation/accounting/taskstats.txt
@@ -96,9 +96,9 @@ a) TASKSTATS_TYPE_AGGR_PID/TGID : attribute containing no payload but indicates
a pid/tgid will be followed by some stats.
b) TASKSTATS_TYPE_PID/TGID: attribute whose payload is the pid/tgid whose stats
-is being returned.
+are being returned.
-c) TASKSTATS_TYPE_STATS: attribute with a struct taskstsats as payload. The
+c) TASKSTATS_TYPE_STATS: attribute with a struct taskstats as payload. The
same structure is used for both per-pid and per-tgid stats.
3. New message sent by kernel whenever a task exits. The payload consists of a
@@ -122,12 +122,12 @@ of atomicity).
However, maintaining per-process, in addition to per-task stats, within the
kernel has space and time overheads. To address this, the taskstats code
-accumalates each exiting task's statistics into a process-wide data structure.
-When the last task of a process exits, the process level data accumalated also
+accumulates each exiting task's statistics into a process-wide data structure.
+When the last task of a process exits, the process level data accumulated also
gets sent to userspace (along with the per-task data).
When a user queries to get per-tgid data, the sum of all other live threads in
-the group is added up and added to the accumalated total for previously exited
+the group is added up and added to the accumulated total for previously exited
threads of the same thread group.
Extending taskstats
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 01:35:23 +0000