From nobody Mon Feb 9 23:39:30 2026 Received: from mail-oo1-f45.google.com (mail-oo1-f45.google.com [209.85.161.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4294F3BBDC for ; Mon, 15 Apr 2024 08:41:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713170496; cv=none; b=kovKBfCHwVZuYUsN4/VkTOEAswYu0E4v9ZCVBiOrnGQ/868EMr3XGiWfjQdwiULPVWhqj2IGG4MqUghT3QBC1Z+eQbnsiRjUewBeIIbeYUiYOcO0KknuNKcHDM/odznYOrzdEM7l4PUPxUOxJIh9l129Wm6N9dSl6Cl+pnZIe+I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713170496; c=relaxed/simple; bh=vZqUoc3gYd+I/LHSXlUpLfccZsnhlmnxJYwDUfMYSzk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=o8JEGKGYMpXmw8LGxYdwpEhZGlFjU8lqqvz8xte1d07vzyZoG4GAFqhiCd0YoYL70nqrKuF9ptgNIwqgK7DJlKmA5vEXhx9b4KLrDnXnA14Tz75g/fcRduXESyaOhAgBD62LMa7lU+mCSKIsTVMCIZUPlyjPURBcKGhUsJZjuE0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com; spf=pass smtp.mailfrom=bytedance.com; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b=FEMyBWQV; arc=none smtp.client-ip=209.85.161.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bytedance.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b="FEMyBWQV" Received: by mail-oo1-f45.google.com with SMTP id 006d021491bc7-5aa3af24775so2267153eaf.0 for ; Mon, 15 Apr 2024 01:41:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1713170494; x=1713775294; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gn/fmyyLOBGP9D7Ah7/te94Cqx4P0YQuEb1tR3Gfsk4=; b=FEMyBWQV2FrEQgQLSm8cNDYj8TnCQPIUWlJjso6vLNXBGGzGA8CueFFl6sE0DdsLLH rSoK1RFxMX9b6f5YWfVWREGxq3hRBwqgC1OR69ZOPhTd8fP9re6lkNCqrULsjWX+4h3a xMyJM1GCOBgKGmriMUgDcgyuujV9VfnEznnBA1Y2H8eTDIxtkevpsgZ82y0ZNaD9Wb+l AXWFs4SWAz9cnnuh/vsbIuePzDCHroX7+R4udDcSxpP8nTh6Bxwqry7lROUvdTCFr+Iw 6KTmDyO+qowVOZIez5+jyuDsmm7iKeVQVt4FeJWHHX7FKF/aEEVNLsqVgzLbXacPmhtg pePg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713170494; x=1713775294; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gn/fmyyLOBGP9D7Ah7/te94Cqx4P0YQuEb1tR3Gfsk4=; b=mvxcBhoL5GgOQnZSoxVvk5EjWnUpk9Rud3Vjx94W3iESSokseVbLaAckCNncrjJTEJ 9v9ao6ISsWyOxDL7WAcc8T7UuNaxuh8KFpnqWYSWYSJK2tyGB/J2NPVgaMru9F3jhNeM sDLtpxUmGelKGKnGK5YHRzWtf9iLJmwAbcam+i6k9W19sUMusp7EdDGxHbfgXegp2hAV C6XYa2afOqTXVI5eH+ZEKiT//WP/FkcntZrXARoMKtde4yfYzuIJYnTiPKl739/nEd7O iEpVQypIycfoMBlNNjubt01fu1qRmyP8hlAyw0/YV/VdywAGTX8/vQEh+PeUHDpiHcrD KdLw== X-Gm-Message-State: AOJu0YzE5Btb/2i1V/L8bXTwjblMhhe7iSlHZhsgPN38IcOpHCFD8KPA L/15XIxTO8R2f3ujhijiKizXRnos1DG5suht81U9jPE5SDt4GzFdWaXmRBxuAYXEVL3qkfIbk9I B X-Google-Smtp-Source: AGHT+IETdp6r2QsgZsbcC8cYUyAoKu02zRWiFTX/N1oYt3Eg7GPbdngrRxjNkXqYCiCkcAyLjTOyFg== X-Received: by 2002:a05:6358:1396:b0:183:6427:10b6 with SMTP id n22-20020a056358139600b00183642710b6mr10637354rwi.19.1713170494297; Mon, 15 Apr 2024 01:41:34 -0700 (PDT) Received: from libai.bytedance.net ([61.213.176.11]) by smtp.gmail.com with ESMTPSA id k187-20020a636fc4000000b005d6a0b2efb3sm6575685pgc.21.2024.04.15.01.41.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 01:41:33 -0700 (PDT) From: zhenwei pi To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev Cc: mst@redhat.com, david@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, akpm@linux-foundation.org, zhenwei pi Subject: [RFC 2/3] virtio_balloon: introduce memory allocation stall counter Date: Mon, 15 Apr 2024 16:41:12 +0800 Message-Id: <20240415084113.1203428-3-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240415084113.1203428-1-pizhenwei@bytedance.com> References: <20240415084113.1203428-1-pizhenwei@bytedance.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Memory allocation stall counter represents the performance/latency of memory allocation, expose this counter to the host side by virtio balloon device via out-of-bound way. Signed-off-by: zhenwei pi --- drivers/virtio/virtio_balloon.c | 19 ++++++++++++++++++- include/uapi/linux/virtio_balloon.h | 6 ++++-- 2 files changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloo= n.c index fd8daa742734..4b9c9569f6e5 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -321,7 +321,7 @@ static unsigned int update_balloon_stats(struct virtio_= balloon *vb) unsigned long events[NR_VM_EVENT_ITEMS]; struct sysinfo i; unsigned int idx =3D 0; - long available; + long available, stall =3D 0; unsigned long caches; =20 all_vm_events(events); @@ -355,6 +355,23 @@ static unsigned int update_balloon_stats(struct virtio= _balloon *vb) update_stat(vb, idx++, VIRTIO_BALLOON_S_OOM_KILL, events[OOM_KILL]); =20 + /* sum all the stall event */ +#ifdef CONFIG_ZONE_DMA + stall +=3D events[ALLOCSTALL_DMA]; +#endif +#ifdef CONFIG_ZONE_DMA32 + stall +=3D events[ALLOCSTALL_DMA32]; +#endif +#ifdef CONFIG_HIGHMEM + stall +=3D events[ALLOCSTALL_HIGH]; +#endif +#ifdef CONFIG_ZONE_DEVICE + stall +=3D events[ALLOCSTALL_DEVICE]; +#endif + stall +=3D events[ALLOCSTALL_NORMAL]; + stall +=3D events[ALLOCSTALL_MOVABLE]; + update_stat(vb, idx++, VIRTIO_BALLOON_S_ALLOC_STALL, stall); + return idx; } =20 diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virti= o_balloon.h index cde5547e64a7..13d0c32ba27c 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -72,7 +72,8 @@ struct virtio_balloon_config { #define VIRTIO_BALLOON_S_HTLB_PGALLOC 8 /* Hugetlb page allocations */ #define VIRTIO_BALLOON_S_HTLB_PGFAIL 9 /* Hugetlb page allocation failu= res */ #define VIRTIO_BALLOON_S_OOM_KILL 10 /* OOM killer invocations */ -#define VIRTIO_BALLOON_S_NR 11 +#define VIRTIO_BALLOON_S_ALLOC_STALL 11 /* Stall count of memory allocat= oin */ +#define VIRTIO_BALLOON_S_NR 12 =20 #define VIRTIO_BALLOON_S_NAMES_WITH_PREFIX(VIRTIO_BALLOON_S_NAMES_prefix) = { \ VIRTIO_BALLOON_S_NAMES_prefix "swap-in", \ @@ -85,7 +86,8 @@ struct virtio_balloon_config { VIRTIO_BALLOON_S_NAMES_prefix "disk-caches", \ VIRTIO_BALLOON_S_NAMES_prefix "hugetlb-allocations", \ VIRTIO_BALLOON_S_NAMES_prefix "hugetlb-failures", \ - VIRTIO_BALLOON_S_NAMES_prefix "oom-kill" \ + VIRTIO_BALLOON_S_NAMES_prefix "oom-kill", \ + VIRTIO_BALLOON_S_NAMES_prefix "alloc-stall" \ } =20 #define VIRTIO_BALLOON_S_NAMES VIRTIO_BALLOON_S_NAMES_WITH_PREFIX("") --=20 2.34.1