From patchwork Thu Jun 23 09:27:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12892018 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DA6CDC43334 for ; Thu, 23 Jun 2022 09:53:24 +0000 (UTC) Received: from localhost ([::1]:46662 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4JWd-0006RT-KB for qemu-devel@archiver.kernel.org; Thu, 23 Jun 2022 05:53:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45128) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4J8Y-000077-Gd for qemu-devel@nongnu.org; Thu, 23 Jun 2022 05:28:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:54106) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4J8W-0004tN-0D for qemu-devel@nongnu.org; Thu, 23 Jun 2022 05:28:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655976507; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5iuQG1I55xP1cM/emunkwVVX+jDe6tIbx145oh9Czg4=; b=KukKeFLZ1w/yzMRmXl5cUclyag05h4OVbeo4dmgqyxGhtppUT77k0u+McMNhmAZYy/JB7M lZM9b9QdNlmRyOekes3XezGvKPchAnTnZCyJwrGChWypjR3M0QaG2iMs8voncLYdLgH9cs 9WpU8EA8HhQ1Zat6//cLt87RPV1jQmI= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-34-BNS7XD-qPE2Ethn8msdAQA-1; Thu, 23 Jun 2022 05:28:26 -0400 X-MC-Unique: BNS7XD-qPE2Ethn8msdAQA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C4EC2185A7B2; Thu, 23 Jun 2022 09:28:25 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.33.36.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id CB3EF40D2962; Thu, 23 Jun 2022 09:28:24 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, berrange@redhat.com, huangy81@chinatelecom.cn, quintela@redhat.com, leobras@redhat.com, peterx@redhat.com Cc: jdenemar@redhat.com Subject: [PULL 08/33] migration: rename rate limiting fields in QEMUFile Date: Thu, 23 Jun 2022 10:27:45 +0100 Message-Id: <20220623092810.96234-9-dgilbert@redhat.com> In-Reply-To: <20220623092810.96234-1-dgilbert@redhat.com> References: <20220623092810.96234-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Daniel P. Berrangé This renames the following QEMUFile fields * bytes_xfer -> rate_limit_used * xfer_limit -> rate_limit_max The intent is to make it clear that 'bytes_xfer' is specifically related to rate limiting of data and applies to data queued, which need not have been transferred on the wire yet if a flush hasn't taken place. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 1479cddad9..03f0b13a55 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -39,8 +39,16 @@ struct QEMUFile { const QEMUFileHooks *hooks; void *opaque; - int64_t bytes_xfer; - int64_t xfer_limit; + /* + * Maximum amount of data in bytes to transfer during one + * rate limiting time window + */ + int64_t rate_limit_max; + /* + * Total amount of data in bytes queued for transfer + * during this rate limiting time window + */ + int64_t rate_limit_used; int64_t pos; /* start of buffer when writing, end of buffer when reading */ @@ -304,7 +312,7 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, int ret = f->hooks->save_page(f, f->opaque, block_offset, offset, size, bytes_sent); if (ret != RAM_SAVE_CONTROL_NOT_SUPP) { - f->bytes_xfer += size; + f->rate_limit_used += size; } if (ret != RAM_SAVE_CONTROL_DELAYED && @@ -457,7 +465,7 @@ void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size, return; } - f->bytes_xfer += size; + f->rate_limit_used += size; add_to_iovec(f, buf, size, may_free); } @@ -475,7 +483,7 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, size_t size) l = size; } memcpy(f->buf + f->buf_index, buf, l); - f->bytes_xfer += l; + f->rate_limit_used += l; add_buf_to_iovec(f, l); if (qemu_file_get_error(f)) { break; @@ -492,7 +500,7 @@ void qemu_put_byte(QEMUFile *f, int v) } f->buf[f->buf_index] = v; - f->bytes_xfer++; + f->rate_limit_used++; add_buf_to_iovec(f, 1); } @@ -674,7 +682,7 @@ int qemu_file_rate_limit(QEMUFile *f) if (qemu_file_get_error(f)) { return 1; } - if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { + if (f->rate_limit_max > 0 && f->rate_limit_used > f->rate_limit_max) { return 1; } return 0; @@ -682,22 +690,22 @@ int qemu_file_rate_limit(QEMUFile *f) int64_t qemu_file_get_rate_limit(QEMUFile *f) { - return f->xfer_limit; + return f->rate_limit_max; } void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) { - f->xfer_limit = limit; + f->rate_limit_max = limit; } void qemu_file_reset_rate_limit(QEMUFile *f) { - f->bytes_xfer = 0; + f->rate_limit_used = 0; } void qemu_file_update_transfer(QEMUFile *f, int64_t len) { - f->bytes_xfer += len; + f->rate_limit_used += len; } void qemu_put_be16(QEMUFile *f, unsigned int v)