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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-10-21 22:47:42 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-06-09 12:34:30 -0300 |
| commit | 29f33c143675c8d2feee3d609472269cf68b614b (patch) | |
| tree | 5953181b4f05064702d5372fab89f40ff824e659 | |
| parent | 59d306b04fb09b14a24cb7c4265339af6f275e3d (diff) | |
| download | tuna-29f33c143675c8d2feee3d609472269cf68b614b.tar.gz | |
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>
| -rwxr-xr-x | tuna-cmd.py | 11 | ||||
| -rwxr-xr-x | tuna/tuna.py | 4 |
2 files changed, 13 insertions, 2 deletions
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 @@ def usage(): 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 @@ def main(): 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 @@ def main(): (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 @@ def generate_rtgroups(filename, kthreads, nr_cpus): 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(",") ] |