From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) by kanga.kvack.org (Postfix) with ESMTP id 5068C6B000E for ; Wed, 10 Oct 2018 16:00:21 -0400 (EDT) Received: by mail-pg1-f197.google.com with SMTP id i189-v6so4590527pge.6 for ; Wed, 10 Oct 2018 13:00:21 -0700 (PDT) Received: from mga11.intel.com (mga11.intel.com. [192.55.52.93]) by mx.google.com with ESMTPS id e7-v6si26111287pgn.82.2018.10.10.13.00.19 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 10 Oct 2018 13:00:20 -0700 (PDT) From: Keith Busch Subject: [PATCH 5/6] tools/gup_benchmark: Add MAP_SHARED option Date: Wed, 10 Oct 2018 13:56:04 -0600 Message-Id: <20181010195605.10689-5-keith.busch@intel.com> In-Reply-To: <20181010195605.10689-1-keith.busch@intel.com> References: <20181010195605.10689-1-keith.busch@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Kirill Shutemov , Dave Hansen , Dan Williams , Andrew Morton , Keith Busch This patch adds a new benchmark option, -S, to request MAP_SHARED. This can be used to compare with MAP_PRIVATE, or for files that require this option, like dax. Signed-off-by: Keith Busch --- tools/testing/selftests/vm/gup_benchmark.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c index b675a3d60975..24528b54549d 100644 --- a/tools/testing/selftests/vm/gup_benchmark.c +++ b/tools/testing/selftests/vm/gup_benchmark.c @@ -32,11 +32,11 @@ int main(int argc, char **argv) struct gup_benchmark gup; unsigned long size = 128 * MB; int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0; - int cmd = GUP_FAST_BENCHMARK; + int cmd = GUP_FAST_BENCHMARK, flags = MAP_PRIVATE; char *file = "/dev/zero"; char *p; - while ((opt = getopt(argc, argv, "m:r:n:f:tTLU")) != -1) { + while ((opt = getopt(argc, argv, "m:r:n:f:tTLUS")) != -1) { switch (opt) { case 'm': size = atoi(optarg) * MB; @@ -65,6 +65,10 @@ int main(int argc, char **argv) case 'f': file = optarg; break; + case 'S': + flags &= ~MAP_PRIVATE; + flags |= MAP_SHARED; + break; default: return -1; } @@ -81,7 +85,7 @@ int main(int argc, char **argv) if (fd == -1) perror("open"), exit(1); - p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, filed, 0); + p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0); if (p == MAP_FAILED) perror("mmap"), exit(1); gup.addr = (unsigned long)p; -- 2.14.4