于 2012年08月29日 04:53, Dave Anderson 写道:
>
>
> ----- Original Message -----
>
>>
>> Right, I understand. What I don't understand is the use of the "child"
>> terminology. If CONFIG_RT_GROUP_SCHED is configured, then the sched_rt_entity
>> may reference a "group" run queue. To me, it doesn't make sense to use
>> the term "CHILD RT PRIO_ARRAY" in the header. Wouldn't it make more sense to
>> call it a "GROUP RT PRIO_ARRAY"? Like this:
>>
>> crash> runq
>> CPU 0 RUNQUEUE: ffff880028216680
>> CURRENT: PID: 5125 TASK: ffff88010799d540 COMMAND: "sh"
>> RT PRIO_ARRAY: ffff880028216808
>> [ 0] PID: 5136 TASK: ffff8801153cc040 COMMAND: "rtloop99"
>> GROUP RT PRIO_ARRAY: ffff88013b050000
>> [ 0] PID: 5133 TASK: ffff88010799c080 COMMAND: "rtloop99"
>> [ 1] PID: 5131 TASK: ffff880037922aa0 COMMAND: "rtloop98"
>> [ 98] PID: 5128 TASK: ffff88011bd87540 COMMAND: "rtloop1"
>> PID: 5130 TASK: ffff8801396e7500 COMMAND: "rtloop1"
>> PID: 5129 TASK: ffff88011bf5a080 COMMAND: "rtloop1"
>> PID: 6 TASK: ffff88013d7c6080 COMMAND: "watchdog/0"
>> PID: 3 TASK: ffff88013d7ba040 COMMAND: "migration/0"
>> [ 1] PID: 5134 TASK: ffff8801153cd500 COMMAND: "rtloop98"
>> PID: 5135 TASK: ffff8801153ccaa0 COMMAND: "rtloop98"
>> ...
>>
>>
>> CPU 1 RUNQUEUE: ffff880028296680
>> CURRENT: PID: 5086 TASK: ffff88006eecc040 COMMAND: "bash"
>> RT PRIO_ARRAY: ffff880028296808
>> [ 0] PID: 5137 TASK: ffff880107b35540 COMMAND: "rtloop99"
>> PID: 10 TASK: ffff88013cc2cae0 COMMAND: "watchdog/1"
>> PID: 2852 TASK: ffff88013bd5aae0 COMMAND:
>> "rtkit-daemon"
>> [ 54] GROUP RT PRIO_ARRAY: ffff880138978000
>> [ 54] PID: 5132 TASK: ffff88006eecd500 COMMAND: "rtloop45"
>> CFS RB_ROOT: ffff880028296718
>> ...
>>
>
> Another question re: your patch -- is it possible to have a "depth" greater
> than 1?
>
Yes, "depth" could be greater than 1, see the example below:
CPU 0 RUNQUEUE: ffff880028216680
CURRENT: PID: 17085 TASK: ffff880137c63540 COMMAND: "bash"
RT PRIO_ARRAY: ffff880028216808 <-- depth = 0
[ 0] PID: 17129 TASK: ffff880037aeaaa0 COMMAND: "rtloop99"
PID: 2832 TASK: ffff88013b09cae0 COMMAND: "rtkit-daemon"
PID: 6 TASK: ffff88013d7c6080 COMMAND: "watchdog/0"
[ 1] GROUP RT PRIO_ARRAY: ffff88002ca65000 <-- depth = 1
[ 1] GROUP RT PRIO_ARRAY: ffff880015821000 <-- depth = 2
[ 1] PID: 17126 TASK: ffff880135d2a040 COMMAND: "rtloop98"
[ 98] PID: 17119 TASK: ffff88010190d500 COMMAND: "rtloop1"
PID: 17121 TASK: ffff88013bd27500 COMMAND: "rtloop1"
PID: 17120 TASK: ffff88010190caa0 COMMAND: "rtloop1"
CFS RB_ROOT: ffff880028216718
[120] PID: 17114 TASK: ffff88001328d500 COMMAND: "sh"
[120] PID: 17112 TASK: ffff880037b84080 COMMAND: "sh"
CPU 1 RUNQUEUE: ffff880028296680
CURRENT: PID: 17106 TASK: ffff88001852a080 COMMAND: "sh"
RT PRIO_ARRAY: ffff880028296808 <-- depth = 0
[ 0] GROUP RT PRIO_ARRAY: ffff880103ded800 <-- depth = 1
[ 0] GROUP RT PRIO_ARRAY: ffff88011ae70800 <-- depth = 2
[ 0] PID: 17127 TASK: ffff8800378f6040 COMMAND: "rtloop99"
PID: 17124 TASK: ffff8800a9592ae0 COMMAND: "rtloop99"
[ 1] PID: 17122 TASK: ffff88011aec3500 COMMAND: "rtloop98"
[ 54] PID: 17123 TASK: ffff88013b414ae0 COMMAND: "rtloop45"
PID: 10 TASK: ffff88013cc2cae0 COMMAND: "watchdog/1"
PID: 7 TASK: ffff88013d7ef500 COMMAND: "migration/1"
[ 1] PID: 17128 TASK: ffff880139761540 COMMAND: "rtloop98"
CFS RB_ROOT: ffff880028296718
[120] PID: 17104 TASK: ffff88010fc0aaa0 COMMAND: "sh"
[120] PID: 17102 TASK: ffff880137f83540 COMMAND: "sh"
[120] PID: 17098 TASK: ffff880013294080 COMMAND: "sh"
[120] PID: 17100 TASK: ffff88011aec2040 COMMAND: "sh"
[120] PID: 17116 TASK: ffff880138d4f540 COMMAND: "sh"
[120] PID: 17110 TASK: ffff880137c06080 COMMAND: "sh"
[120] PID: 17108 TASK: ffff880037aeb500 COMMAND: "sh"
Hmm, I think the depth could not be that big. So how do you think this
kind of output.
The attached patch just changed "CHILD" to "GROUP".
Thanks
Zhang Yanfei
>From 550d428cbb6d9d22837e3ef138e1de59e7ccc1b3 Mon Sep 17 00:00:00 2001
From: zhangyanfei <zhangyanfei@xxxxxxxxxxxxxx>
Date: Sat, 25 Aug 2012 11:17:37 +0800
Subject: [PATCH] Fix rt not support group sched bug
Signed-off-by: zhangyanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
defs.h | 2 ++
symbols.c | 4 ++++
task.c | 47 ++++++++++++++++++++++++++++++++++++++++-------
3 files changed, 46 insertions(+), 7 deletions(-)
diff --git a/defs.h b/defs.h
index 4a8e2e3..4af670d 100755
--- a/defs.h
+++ b/defs.h
@@ -1785,6 +1785,7 @@ struct offset_table { /* stash of commonly-used offsets */
long log_level;
long log_flags_level;
long timekeeper_xtime_sec;
+ long sched_rt_entity_my_q;
};
struct size_table { /* stash of commonly-used sizes */
@@ -1919,6 +1920,7 @@ struct size_table { /* stash of commonly-used sizes */
long msg_queue;
long log;
long log_level;
+ long rt_rq;
};
struct array_table {
diff --git a/symbols.c b/symbols.c
index 2646ff8..bbadd5e 100755
--- a/symbols.c
+++ b/symbols.c
@@ -8812,6 +8812,8 @@ dump_offset_table(char *spec, ulong makestruct)
OFFSET(log_level));
fprintf(fp, " log_flags_level: %ld\n",
OFFSET(log_flags_level));
+ fprintf(fp, " sched_rt_entity_my_q: %ld\n",
+ OFFSET(sched_rt_entity_my_q));
fprintf(fp, "\n size_table:\n");
fprintf(fp, " page: %ld\n", SIZE(page));
@@ -9027,6 +9029,8 @@ dump_offset_table(char *spec, ulong makestruct)
SIZE(log));
fprintf(fp, " log_level: %ld\n",
SIZE(log_level));
+ fprintf(fp, " rt_rq: %ld\n",
+ SIZE(rt_rq));
fprintf(fp, "\n array_table:\n");
/*
diff --git a/task.c b/task.c
index 6e4cfec..eeaad60 100755
--- a/task.c
+++ b/task.c
@@ -7552,6 +7552,7 @@ dump_CFS_runqueues(void)
if (!VALID_STRUCT(cfs_rq)) {
STRUCT_SIZE_INIT(cfs_rq, "cfs_rq");
+ STRUCT_SIZE_INIT(rt_rq, "rt_rq");
MEMBER_OFFSET_INIT(rq_rt, "rq", "rt");
MEMBER_OFFSET_INIT(rq_nr_running, "rq", "nr_running");
MEMBER_OFFSET_INIT(task_struct_se, "task_struct", "se");
@@ -7562,6 +7563,8 @@ dump_CFS_runqueues(void)
"cfs_rq");
MEMBER_OFFSET_INIT(sched_entity_my_q, "sched_entity",
"my_q");
+ MEMBER_OFFSET_INIT(sched_rt_entity_my_q, "sched_rt_entity",
+ "my_q");
MEMBER_OFFSET_INIT(sched_entity_on_rq, "sched_entity", "on_rq");
MEMBER_OFFSET_INIT(cfs_rq_rb_leftmost, "cfs_rq", "rb_leftmost");
MEMBER_OFFSET_INIT(cfs_rq_nr_running, "cfs_rq", "nr_running");
@@ -7648,6 +7651,8 @@ dump_CFS_runqueues(void)
FREEBUF(cfs_rq_buf);
}
+static int depth = 0;
+
static void
dump_RT_prio_array(ulong k_prio_array, char *u_prio_array)
{
@@ -7657,8 +7662,11 @@ dump_RT_prio_array(ulong k_prio_array, char *u_prio_array)
struct list_data list_data, *ld;
struct task_context *tc;
ulong *tlist;
+ ulong my_q, task_addr;
+ char *rt_rq_buf;
- fprintf(fp, " RT PRIO_ARRAY: %lx\n", k_prio_array);
+ if (!depth)
+ fprintf(fp, " RT PRIO_ARRAY: %lx\n", k_prio_array);
qheads = (i = ARRAY_LENGTH(rt_prio_array_queue)) ?
i : get_array_length("rt_prio_array.queue", NULL, SIZE(list_head));
@@ -7678,14 +7686,14 @@ dump_RT_prio_array(ulong k_prio_array, char *u_prio_array)
if ((list_head[0] == kvaddr) && (list_head[1] == kvaddr))
continue;
- fprintf(fp, " [%3d] ", i);
+ INDENT(5 + 9 * depth);
+ fprintf(fp, "[%3d] ", i);
BZERO(ld, sizeof(struct list_data));
ld->start = list_head[0];
if (VALID_MEMBER(task_struct_rt) &&
VALID_MEMBER(sched_rt_entity_run_list))
- ld->list_head_offset = OFFSET(task_struct_rt) +
- OFFSET(sched_rt_entity_run_list);
+ ld->list_head_offset = OFFSET(sched_rt_entity_run_list);
else
ld->list_head_offset = OFFSET(task_struct_run_list);
ld->end = kvaddr;
@@ -7695,10 +7703,35 @@ dump_RT_prio_array(ulong k_prio_array, char *u_prio_array)
tlist = (ulong *)GETBUF((cnt) * sizeof(ulong));
cnt = retrieve_list(tlist, cnt);
for (c = 0; c < cnt; c++) {
- if (!(tc = task_to_context(tlist[c])))
+ task_addr = tlist[c];
+ if (VALID_MEMBER(sched_rt_entity_my_q)) {
+ readmem(tlist[c] + OFFSET(sched_rt_entity_my_q),
+ KVADDR, &my_q, sizeof(ulong), "my_q",
+ FAULT_ON_ERROR);
+ if (my_q) {
+ rt_rq_buf = GETBUF(SIZE(rt_rq));
+ readmem(my_q, KVADDR, rt_rq_buf,
+ SIZE(rt_rq), "rt_rq",
+ FAULT_ON_ERROR);
+ if (c)
+ INDENT(11 + 9 * depth);
+ fprintf(fp, "GROUP RT PRIO_ARRAY: %lx\n",
+ my_q + OFFSET(rt_rq_active));
+ tot++;
+ depth++;
+ dump_RT_prio_array(
+ my_q + OFFSET(rt_rq_active),
+ &rt_rq_buf[OFFSET(rt_rq_active)]);
+ depth--;
+ continue;
+ } else {
+ task_addr -= OFFSET(task_struct_rt);
+ }
+ }
+ if (!(tc = task_to_context(task_addr)))
continue;
if (c)
- INDENT(11);
+ INDENT(11 + 9 * depth);
fprintf(fp, "PID: %-5ld TASK: %lx COMMAND: \"%s\"\n",
tc->pid, tc->task, tc->comm);
tot++;
@@ -7707,7 +7740,7 @@ dump_RT_prio_array(ulong k_prio_array, char *u_prio_array)
}
if (!tot) {
- INDENT(5);
+ INDENT(5 + 9 * depth);
fprintf(fp, "[no tasks queued]\n");
}
}
--
1.7.1
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