|
 |
9da9ec |
From 1dd72d9db74b063c8dd96f13701a14e299abc325 Mon Sep 17 00:00:00 2001
|
|
|
9da9ec |
From: John Kacur <jkacur@redhat.com>
|
|
|
9da9ec |
Date: Thu, 28 Oct 2021 00:50:12 -0400
|
|
|
9da9ec |
Subject: [PATCH 1/2] tuna: Print warning if setting affinity results in EBUSY
|
|
|
9da9ec |
and continue
|
|
|
9da9ec |
|
|
|
9da9ec |
When trying to isolate a CPU, if a device uses SCHED_DEADLINE and admission
|
|
|
9da9ec |
control is enabled, setting the affinity will result in the error EBUSY.
|
|
|
9da9ec |
|
|
|
9da9ec |
tuna should print a warning that this pid could not be moved, and
|
|
|
9da9ec |
continue.
|
|
|
9da9ec |
|
|
|
9da9ec |
The user can either ignore the warning or use other measures to isolate
|
|
|
9da9ec |
the cpu such as booting with isolcpus or turning off admission control
|
|
|
9da9ec |
and rerunning the tuna isolate command and then turning admission
|
|
|
9da9ec |
control back on.
|
|
|
9da9ec |
|
|
|
9da9ec |
Signed-off-by: John Kacur <jkacur@redhat.com>
|
|
|
9da9ec |
---
|
|
|
9da9ec |
tuna/tuna.py | 4 ++++
|
|
|
9da9ec |
1 file changed, 4 insertions(+)
|
|
|
9da9ec |
|
|
|
9da9ec |
diff --git a/tuna/tuna.py b/tuna/tuna.py
|
|
|
9da9ec |
index 591206d9b4e1..f25eb3d10923 100755
|
|
|
9da9ec |
--- a/tuna/tuna.py
|
|
|
9da9ec |
+++ b/tuna/tuna.py
|
|
|
9da9ec |
@@ -360,6 +360,10 @@ def isolate_cpus(cpus, nr_cpus):
|
|
|
9da9ec |
if err.args[0] == errno.EINVAL:
|
|
|
9da9ec |
print("Function:", fname, ",", err.strerror, file=sys.stderr)
|
|
|
9da9ec |
sys.exit(2)
|
|
|
9da9ec |
+ if err.args[0] == errno.EBUSY:
|
|
|
9da9ec |
+ comm = ps[pid].stat["comm"]
|
|
|
9da9ec |
+ print(f'Warning: Unable to isolate pid {pid} [{comm}]')
|
|
|
9da9ec |
+ continue
|
|
|
9da9ec |
raise err
|
|
|
9da9ec |
|
|
|
9da9ec |
if "threads" not in ps[pid]:
|
|
|
9da9ec |
--
|
|
|
9da9ec |
2.31.1
|
|
|
9da9ec |
|