CLI: Introduce --nohz_full/-N entity
This will set as the cpu list what was configured on the nohz_full=
kernel command line argument, allowing isolating these CPUs and then
moving to it some important app, i.e. all the other operations one
can do in tuna can apply to that cpu list.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tuna-cmd.py b/tuna-cmd.py
index cc21656..f85b629 100755
--- a/tuna-cmd.py
+++ b/tuna-cmd.py
@@ -58,6 +58,7 @@
print fmt % ('-K, --no_kthreads', _('Operations will not affect kernel threads'))
print fmt % ('-m, --move', _('Move selected entities to %(cpulist)s') % \
{"cpulist": _('CPU-LIST')})
+ print fmt % ('-N, --nohz_full', _('CPUs in nohz_full= kernel command line will be affected by operations'))
if have_inet_diag:
print fmt % ('-n, --show_sockets', _('Show network sockets in use by threads'))
print fmt % ('-p, --priority=[' +
@@ -449,9 +450,9 @@
i18n_init()
try:
- short = "a:c:CfgGhiIKlmp:PQq:s:S:t:UvWx"
+ short = "a:c:CfgGhiIKlmNp:PQq:s:S:t:UvWx"
long = ["cpus=", "affect_children", "filter", "gui", "help",
- "isolate", "include", "no_kthreads", "move",
+ "isolate", "include", "no_kthreads", "move", "nohz_full",
"show_sockets", "priority=", "show_threads",
"show_irqs", "irqs=",
"save=", "sockets=", "threads=", "no_uthreads",
@@ -490,6 +491,12 @@
(op, a) = pick_op(a)
op_list = tuna.cpustring_to_list(a)
cpu_list = do_list_op(op, cpu_list, op_list)
+ elif o in ("-N", "--nohz_full"):
+ try:
+ cpu_list = tuna.nohz_full_list()
+ except:
+ print "tuna: --nohz_full " + _(" needs nohz_full=cpulist on the kernel command line")
+ sys.exit(2)
elif o in ("-C", "--affect_children"):
affect_children = True
elif o in ("-G", "--cgroup"):
diff --git a/tuna/tuna.py b/tuna/tuna.py
index 49c9eab..7b839f1 100755
--- a/tuna/tuna.py
+++ b/tuna/tuna.py
@@ -622,3 +622,7 @@
schedutils.schedstr(kt.policy)[6].lower(),
kt.rtprio, mask, regex))
f.close()
+
+
+def nohz_full_list():
+ return [ int(cpu) for cpu in procfs.cmdline().options["nohz_full"].split(",") ]
