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GET /api/patches/61577/?format=api
{ "id": 61577, "url": "https://patches.dpdk.org/api/patches/61577/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/1571651279-51857-7-git-send-email-gavin.hu@arm.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1571651279-51857-7-git-send-email-gavin.hu@arm.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1571651279-51857-7-git-send-email-gavin.hu@arm.com", "date": "2019-10-21T09:47:59", "name": "[v8,6/6] event/opdl: use new API to save cycles on aarch64", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "1361f59fbd841b4267d25a1f648ce99d67118b33", "submitter": { "id": 1018, "url": "https://patches.dpdk.org/api/people/1018/?format=api", "name": "Gavin Hu", "email": "gavin.hu@arm.com" }, "delegate": { "id": 24651, "url": "https://patches.dpdk.org/api/users/24651/?format=api", "username": "dmarchand", "first_name": "David", "last_name": "Marchand", "email": "david.marchand@redhat.com" }, "mbox": "https://patches.dpdk.org/project/dpdk/patch/1571651279-51857-7-git-send-email-gavin.hu@arm.com/mbox/", "series": [ { "id": 6963, "url": "https://patches.dpdk.org/api/series/6963/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=6963", "date": "2019-10-21T09:47:53", "name": "use WFE for aarch64", "version": 8, "mbox": "https://patches.dpdk.org/series/6963/mbox/" } ], "comments": "https://patches.dpdk.org/api/patches/61577/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/61577/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 080661BEB9;\n\tMon, 21 Oct 2019 11:48:53 +0200 (CEST)", "from foss.arm.com (unknown [217.140.110.172])\n\tby dpdk.org (Postfix) with ESMTP id F2D301BEB9\n\tfor <dev@dpdk.org>; Mon, 21 Oct 2019 11:48:51 +0200 (CEST)", "from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14])\n\tby usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8D57015A1;\n\tMon, 21 Oct 2019 02:48:43 -0700 (PDT)", "from net-arm-thunderx2-01.test.ast.arm.com\n\t(net-arm-thunderx2-01.shanghai.arm.com [10.169.40.40])\n\tby usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id\n\t82DA63F718; Mon, 21 Oct 2019 02:48:39 -0700 (PDT)" ], "From": "Gavin Hu <gavin.hu@arm.com>", "To": "dev@dpdk.org", "Cc": "nd@arm.com, david.marchand@redhat.com, konstantin.ananyev@intel.com,\n\tthomas@monjalon.net, stephen@networkplumber.org, hemant.agrawal@nxp.com, \n\tjerinj@marvell.com, pbhagavatula@marvell.com,\n\tHonnappa.Nagarahalli@arm.com, \n\truifeng.wang@arm.com, phil.yang@arm.com, steve.capper@arm.com", "Date": "Mon, 21 Oct 2019 17:47:59 +0800", "Message-Id": "<1571651279-51857-7-git-send-email-gavin.hu@arm.com>", "X-Mailer": "git-send-email 2.7.4", "In-Reply-To": [ "<1571651279-51857-1-git-send-email-gavin.hu@arm.com>", "<1561911676-37718-1-git-send-email-gavin.hu@arm.com>" ], "References": [ "<1571651279-51857-1-git-send-email-gavin.hu@arm.com>", "<1561911676-37718-1-git-send-email-gavin.hu@arm.com>" ], "Subject": "[dpdk-dev] [PATCH v8 6/6] event/opdl: use new API to save cycles on\n\taarch64", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Use the new API to wait in low power state instead of continuous\npolling to save CPU cycles and power.\n\nSigned-off-by: Gavin Hu <gavin.hu@arm.com>\nReviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>\nReviewed-by: Jerin Jacob <jerinj@marvell.com>\n---\n drivers/event/opdl/Makefile | 1 +\n drivers/event/opdl/meson.build | 1 +\n drivers/event/opdl/opdl_ring.c | 5 ++---\n 3 files changed, 4 insertions(+), 3 deletions(-)", "diff": "diff --git a/drivers/event/opdl/Makefile b/drivers/event/opdl/Makefile\nindex bf50a60..72ef07d 100644\n--- a/drivers/event/opdl/Makefile\n+++ b/drivers/event/opdl/Makefile\n@@ -9,6 +9,7 @@ LIB = librte_pmd_opdl_event.a\n # build flags\n CFLAGS += -O3\n CFLAGS += $(WERROR_FLAGS)\n+CFLAGS += -DALLOW_EXPERIMENTAL_API\n # for older GCC versions, allow us to initialize an event using\n # designated initializers.\n ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)\ndiff --git a/drivers/event/opdl/meson.build b/drivers/event/opdl/meson.build\nindex 1fe034e..e67b164 100644\n--- a/drivers/event/opdl/meson.build\n+++ b/drivers/event/opdl/meson.build\n@@ -1,6 +1,7 @@\n # SPDX-License-Identifier: BSD-3-Clause\n # Copyright(c) 2018 Luca Boccassi <bluca@debian.org>\n \n+allow_experimental_apis = true\n sources = files(\n \t'opdl_evdev.c',\n \t'opdl_evdev_init.c',\ndiff --git a/drivers/event/opdl/opdl_ring.c b/drivers/event/opdl/opdl_ring.c\nindex 06fb5b3..c8d19fe 100644\n--- a/drivers/event/opdl/opdl_ring.c\n+++ b/drivers/event/opdl/opdl_ring.c\n@@ -16,6 +16,7 @@\n #include <rte_memcpy.h>\n #include <rte_memory.h>\n #include <rte_memzone.h>\n+#include <rte_atomic.h>\n \n #include \"opdl_ring.h\"\n #include \"opdl_log.h\"\n@@ -474,9 +475,7 @@ opdl_ring_input_multithread(struct opdl_ring *t, const void *entries,\n \t/* If another thread started inputting before this one, but hasn't\n \t * finished, we need to wait for it to complete to update the tail.\n \t */\n-\twhile (unlikely(__atomic_load_n(&s->shared.tail, __ATOMIC_ACQUIRE) !=\n-\t\t\told_head))\n-\t\trte_pause();\n+\trte_wait_until_equal_32(&s->shared.tail, old_head, __ATOMIC_ACQUIRE);\n \n \t__atomic_store_n(&s->shared.tail, old_head + num_entries,\n \t\t\t__ATOMIC_RELEASE);\n", "prefixes": [ "v8", "6/6" ] }