this patch will fix ps command not to display ">" before idle task on
offline cpu and add an "<OFFLINE>" at the end of the line.
The original output is like below:
<cut>
PID PPID CPU TASK ST %MEM VSZ RSS COMM
> 0 0 0 ffffffff818d5440 RU 0.0 0 0 [swapper/0]
> 0 0 1 ffff88003dad4fa0 RU 0.0 0 0 [swapper/1]
> 0 0 2 ffff88003dad5b00 RU 0.0 0 0 [swapper/2]
> 0 0 3 ffff88003dad6660 RU 0.0 0 0 [swapper/3]
1 0 1 ffff88003da98000 IN 0.7 50792 7056 systemd
2 0 3 ffff88003da98b60 IN 0.0 0 0 [kthreadd]
...
<cut>
With this patch, the idle task on offline cpu(cpu #2) will be changed like
below:
<cut>
PID PPID CPU TASK ST %MEM VSZ RSS COMM
> 0 0 0 ffffffff818d5440 RU 0.0 0 0 [swapper/0]
> 0 0 1 ffff88003dad4fa0 RU 0.0 0 0 [swapper/1]
0 0 2 ffff88003dad5b00 RU 0.0 0 0 [swapper/2]
<OFFLINE>
> 0 0 3 ffff88003dad6660 RU 0.0 0 0 [swapper/3]
1 0 1 ffff88003da98000 IN 0.7 50792 7056 systemd
2 0 3 ffff88003da98b60 IN 0.0 0 0 [kthreadd]
...
<cut>
Signed-off-by: Qiao Nuohan <[email protected]>
---
task.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/task.c b/task.c
index 53fc060..27c3aa4 100755
--- a/task.c
+++ b/task.c
@@ -3093,6 +3093,7 @@ show_ps_data(ulong flag, struct task_context *tc, struct
psinfo *psi)
char buf2[BUFSIZE];
char buf3[BUFSIZE];
ulong tgid;
+ int task_active, task_offline;
if ((flag & PS_USER) && is_kernel_thread(tc->task))
return;
@@ -3153,7 +3154,17 @@ show_ps_data(ulong flag, struct task_context *tc, struct
psinfo *psi)
tm = &task_mem_usage;
get_task_mem_usage(tc->task, tm);
- fprintf(fp, "%s", is_task_active(tc->task) ? "> " : " ");
+
+ task_offline = FALSE;
+ task_active = is_task_active(tc->task);
+
+ /* check whether the task is "active" on an offline cpu */
+ if (task_active && check_offline_cpu(tc->processor)) {
+ task_active = FALSE;
+ task_offline = TRUE;
+ }
+
+ fprintf(fp, "%s", task_active ? "> " : " ");
fprintf(fp, "%5ld %5ld %2s %s %3s",
tc->pid, task_to_pid(tc->ptask),
task_cpu(tc->processor, buf2, !VERBOSE),
@@ -3167,9 +3178,14 @@ show_ps_data(ulong flag, struct task_context *tc, struct
psinfo *psi)
fprintf(fp, "%7ld ", (tm->total_vm * PAGESIZE())/1024);
fprintf(fp, "%6ld ", (tm->rss * PAGESIZE())/1024);
if (is_kernel_thread(tc->task))
- fprintf(fp, "[%s]\n", tc->comm);
+ fprintf(fp, "[%s]", tc->comm);
else
- fprintf(fp, "%s\n", tc->comm);
+ fprintf(fp, "%s", tc->comm);
+
+ if (task_offline)
+ fprintf(fp, " <OFFLINE>\n");
+ else
+ fprintf(fp, "\n");
}
static void
--
1.8.5.3
--
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