Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751601AbdI1TrJ (ORCPT ); Thu, 28 Sep 2017 15:47:09 -0400 Received: from shelob.surriel.com ([96.67.55.147]:48432 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751464AbdI1TrI (ORCPT ); Thu, 28 Sep 2017 15:47:08 -0400 Message-ID: <1506628013.21121.104.camel@surriel.com> Subject: Re: [PATCH v2 0/2] Replace PID bitmap allocation with IDR API From: Rik van Riel To: Gargi Sharma , "Eric W. Biederman" Cc: linux-kernel@vger.kernel.org, Julia Lawall , akpm@linux-foundation.org, mingo@kernel.org, pasha.tatashin@oracle.com, ktkhai@virtuozzo.com, Oleg Nesterov Date: Thu, 28 Sep 2017 15:46:53 -0400 In-Reply-To: References: <87ing4vz5b.fsf@xmission.com> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-s8mLm11LpJkZ/HnEe/IL" X-Mailer: Evolution 3.22.6 (3.22.6-2.fc25) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1471 Lines: 49 --=-s8mLm11LpJkZ/HnEe/IL Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2017-09-29 at 01:09 +0530, Gargi Sharma wrote: > 1000 processes that just sleep and sit around without doing > anything(100 second sleep and then exit). >=20 > pstree with 10,000 processes > real =C2=A0 =C2=A00m0.859s > user =C2=A0 =C2=A00m0.536s > sys =C2=A0 =C2=A00m0.172s >=20 > ps with 10,000 processes > real =C2=A0 =C2=A00m0.918s > user =C2=A0 =C2=A00m0.100s > sys =C2=A0 =C2=A00m0.172s >=20 > Stats for calling readdir on /proc with 10,000 processes > real =C2=A0 =C2=A00m0.092s > user =C2=A0 =C2=A00m0.000s > sys =C2=A0 =C2=A00m0.020s Is that with or without your patches? How does it compare to a kernel with(out) your patches? --=20 All Rights Reversed. --=-s8mLm11LpJkZ/HnEe/IL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJZzVGuAAoJEM553pKExN6DKeYIAKkjcqJ/An/+Ju0YopNyntiF wDLlCgQ26yCVeVmOHy5fPcSKkd+s3a3AKb7268IaB2UAPBlW32Sm9KtKoRn6EYGU s+IGl5gI+DiOSas6UJI7WwYc+krKS8InCQp9CFygB+5bpvz4Vz+JwlQRTlufTU0d ukRpkB8jzecT6vz0U9x//QZOXVG7h2WfmQzQnXXdHQX6bZsa6Gq6lE0+UboBGlCJ tTS6J/dlyQqvSxOXOeXqj0Ef9x7ehAtij3Gvp7KGLGyyjlJBfwHGpBC8lJh4GX7Q 9WFGepPhEUv1iUnuRywe1xlWo3dLIn2rYv9gjCq4df091UzgP33Devv9GhS1KK8= =Mmh9 -----END PGP SIGNATURE----- --=-s8mLm11LpJkZ/HnEe/IL--