From patchwork Tue Jan 26 13:46:56 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 8122781 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E73FDBEEE5 for ; Tue, 26 Jan 2016 14:03:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 21A4F20256 for ; Tue, 26 Jan 2016 14:03:24 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 86AA920222 for ; Tue, 26 Jan 2016 14:03:19 +0000 (UTC) Received: from localhost ([::1]:44054 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO4DG-0005vq-Vp for patchwork-qemu-devel@patchwork.kernel.org; Tue, 26 Jan 2016 09:03:18 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35089) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO3yW-0000EX-I3 for qemu-devel@nongnu.org; Tue, 26 Jan 2016 08:48:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aO3yV-00045h-7Y for qemu-devel@nongnu.org; Tue, 26 Jan 2016 08:48:04 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40925) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO3yV-00045U-0Q for qemu-devel@nongnu.org; Tue, 26 Jan 2016 08:48:03 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 99E335D; Tue, 26 Jan 2016 13:48:02 +0000 (UTC) Received: from 640k.localdomain.com (ovpn-112-67.ams2.redhat.com [10.36.112.67]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u0QDlNqZ028272; Tue, 26 Jan 2016 08:48:01 -0500 From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Tue, 26 Jan 2016 14:46:56 +0100 Message-Id: <1453816041-36362-25-git-send-email-pbonzini@redhat.com> In-Reply-To: <1453816041-36362-1-git-send-email-pbonzini@redhat.com> References: <1453816041-36362-1-git-send-email-pbonzini@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Janosch Frank Subject: [Qemu-devel] [PULL 24/49] scripts/kvm/kvm_stat: Introduce properties for providers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Janosch Frank As previous commit authors used a mixture of setters/getters and direct access to class variables consolidating them the python way improved readability. Properties allow us to assign a value to a class variable through a setter without the need to call the setter ourselves. Reviewed-by: Jason J. Herne Signed-off-by: Janosch Frank Message-Id: <1452525484-32309-19-git-send-email-frankja@linux.vnet.ibm.com> [prop.setter is new in Python 2.6, which is the earliest supported version. - Paolo] Signed-off-by: Paolo Bonzini --- scripts/kvm/kvm_stat | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/scripts/kvm/kvm_stat b/scripts/kvm/kvm_stat index 66dfed6..c4e22d0 100755 --- a/scripts/kvm/kvm_stat +++ b/scripts/kvm/kvm_stat @@ -385,9 +385,7 @@ class TracepointProvider(object): extra.append(f + '(' + name + ')') fields += extra self._setup(fields) - self.select(fields) - def fields(self): - return self._fields + self.fields = fields def _setup(self, _fields): self._fields = _fields @@ -417,7 +415,14 @@ class TracepointProvider(object): tracepoint=tracepoint, tracefilter=tracefilter) self.group_leaders.append(group) - def select(self, fields): + + @property + def fields(self): + return self._fields + + @fields.setter + def fields(self, fields): + self._fields = fields for group in self.group_leaders: for event in group.events: if event.name in fields: @@ -425,6 +430,7 @@ class TracepointProvider(object): event.enable() else: event.disable() + def read(self): ret = defaultdict(int) for group in self.group_leaders: @@ -435,10 +441,15 @@ class TracepointProvider(object): class DebugfsProvider(object): def __init__(self): self._fields = walkdir(PATH_DEBUGFS_KVM)[2] + + @property def fields(self): return self._fields - def select(self, fields): + + @fields.setter + def fields(self, fields): self._fields = fields + def read(self): def val(key): return int(file(PATH_DEBUGFS_KVM + '/' + key).read()) @@ -456,17 +467,17 @@ class Stats: return re.match(self.fields_filter, key) is not None self.values = dict() for d in self.providers: - provider_fields = [key for key in d.fields() if wanted(key)] + provider_fields = [key for key in d.fields if wanted(key)] for key in provider_fields: self.values[key] = None - d.select(provider_fields) + d.fields = provider_fields def set_fields_filter(self, fields_filter): self.fields_filter = fields_filter self._update() def get(self): for d in self.providers: new = d.read() - for key in d.fields(): + for key in d.fields: oldval = self.values.get(key, (0, 0)) newval = new[key] newdelta = None