On Thu, 11 Apr 2024 14:09:24 +0800, Jason Wang <jasowang@xxxxxxxxxx> wrote: > On Wed, Apr 10, 2024 at 6:55 PM Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> wrote: > > > > On Wed, 10 Apr 2024 14:09:23 +0800, Jason Wang <jasowang@xxxxxxxxxx> wrote: > > > On Mon, Mar 18, 2024 at 7:06 PM Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> wrote: > > > > > > > > As the spec https://github.com/oasis-tcs/virtio-spec/commit/42f389989823039724f95bbbd243291ab0064f82 > > > > > > > > make virtio-net support getting the stats from the device by ethtool -S > > > > <eth0>. > > > > > > > > Due to the numerous descriptors stats, an organization method is > > > > required. For this purpose, I have introduced the "virtnet_stats_map". > > > > Utilizing this array simplifies coding tasks such as generating field > > > > names, calculating buffer sizes for requests and responses, and parsing > > > > replies from the device. By iterating over the "virtnet_stats_map," > > > > these operations become more streamlined and efficient. > > > > > > > > NIC statistics: > > > > rx0_packets: 582951 > > > > rx0_bytes: 155307077 > > > > rx0_drops: 0 > > > > rx0_xdp_packets: 0 > > > > rx0_xdp_tx: 0 > > > > rx0_xdp_redirects: 0 > > > > rx0_xdp_drops: 0 > > > > rx0_kicks: 17007 > > > > rx0_hw_packets: 2179409 > > > > rx0_hw_bytes: 510015040 > > > > rx0_hw_notifications: 0 > > > > rx0_hw_interrupts: 0 > > > > rx0_hw_drops: 12964 > > > > rx0_hw_drop_overruns: 0 > > > > rx0_hw_csum_valid: 2179409 > > > > rx0_hw_csum_none: 0 > > > > rx0_hw_csum_bad: 0 > > > > rx0_hw_needs_csum: 2179409 > > > > rx0_hw_ratelimit_packets: 0 > > > > rx0_hw_ratelimit_bytes: 0 > > > > tx0_packets: 15361 > > > > tx0_bytes: 1918970 > > > > tx0_xdp_tx: 0 > > > > tx0_xdp_tx_drops: 0 > > > > tx0_kicks: 15361 > > > > tx0_timeouts: 0 > > > > tx0_hw_packets: 32272 > > > > tx0_hw_bytes: 4311698 > > > > tx0_hw_notifications: 0 > > > > tx0_hw_interrupts: 0 > > > > tx0_hw_drops: 0 > > > > tx0_hw_drop_malformed: 0 > > > > tx0_hw_csum_none: 0 > > > > tx0_hw_needs_csum: 32272 > > > > tx0_hw_ratelimit_packets: 0 > > > > tx0_hw_ratelimit_bytes: 0 > > > > > > > > Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> > > > > --- > > > > drivers/net/virtio_net.c | 401 ++++++++++++++++++++++++++++++++++++++- > > > > 1 file changed, 397 insertions(+), 4 deletions(-) > > > > > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > > > index 8cb5bdd7ad91..70c1d4e850e0 100644 > > > > --- a/drivers/net/virtio_net.c > > > > +++ b/drivers/net/virtio_net.c > > > > @@ -128,6 +128,129 @@ static const struct virtnet_stat_desc virtnet_rq_stats_desc[] = { > > > > #define VIRTNET_SQ_STATS_LEN ARRAY_SIZE(virtnet_sq_stats_desc) > > > > #define VIRTNET_RQ_STATS_LEN ARRAY_SIZE(virtnet_rq_stats_desc) > > > > > > > > +#define VIRTNET_STATS_DESC_CQ(name) \ > > > > + {#name, offsetof(struct virtio_net_stats_cvq, name)} > > > > + > > > > +#define VIRTNET_STATS_DESC_RX(class, name) \ > > > > + {#name, offsetof(struct virtio_net_stats_rx_ ## class, rx_ ## name)} > > > > + > > > > +#define VIRTNET_STATS_DESC_TX(class, name) \ > > > > + {#name, offsetof(struct virtio_net_stats_tx_ ## class, tx_ ## name)} > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_cvq_desc[] = { > > > > + VIRTNET_STATS_DESC_CQ(command_num), > > > > + VIRTNET_STATS_DESC_CQ(ok_num), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_rx_basic_desc[] = { > > > > + VIRTNET_STATS_DESC_RX(basic, packets), > > > > + VIRTNET_STATS_DESC_RX(basic, bytes), > > > > + > > > > + VIRTNET_STATS_DESC_RX(basic, notifications), > > > > + VIRTNET_STATS_DESC_RX(basic, interrupts), > > > > + > > > > + VIRTNET_STATS_DESC_RX(basic, drops), > > > > + VIRTNET_STATS_DESC_RX(basic, drop_overruns), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_tx_basic_desc[] = { > > > > + VIRTNET_STATS_DESC_TX(basic, packets), > > > > + VIRTNET_STATS_DESC_TX(basic, bytes), > > > > + > > > > + VIRTNET_STATS_DESC_TX(basic, notifications), > > > > + VIRTNET_STATS_DESC_TX(basic, interrupts), > > > > + > > > > + VIRTNET_STATS_DESC_TX(basic, drops), > > > > + VIRTNET_STATS_DESC_TX(basic, drop_malformed), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_rx_csum_desc[] = { > > > > + VIRTNET_STATS_DESC_RX(csum, csum_valid), > > > > + VIRTNET_STATS_DESC_RX(csum, needs_csum), > > > > + > > > > + VIRTNET_STATS_DESC_RX(csum, csum_none), > > > > + VIRTNET_STATS_DESC_RX(csum, csum_bad), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_tx_csum_desc[] = { > > > > + VIRTNET_STATS_DESC_TX(csum, needs_csum), > > > > + VIRTNET_STATS_DESC_TX(csum, csum_none), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_rx_gso_desc[] = { > > > > + VIRTNET_STATS_DESC_RX(gso, gso_packets), > > > > + VIRTNET_STATS_DESC_RX(gso, gso_bytes), > > > > + VIRTNET_STATS_DESC_RX(gso, gso_packets_coalesced), > > > > + VIRTNET_STATS_DESC_RX(gso, gso_bytes_coalesced), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_tx_gso_desc[] = { > > > > + VIRTNET_STATS_DESC_TX(gso, gso_packets), > > > > + VIRTNET_STATS_DESC_TX(gso, gso_bytes), > > > > + VIRTNET_STATS_DESC_TX(gso, gso_segments), > > > > + VIRTNET_STATS_DESC_TX(gso, gso_segments_bytes), > > > > + VIRTNET_STATS_DESC_TX(gso, gso_packets_noseg), > > > > + VIRTNET_STATS_DESC_TX(gso, gso_bytes_noseg), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_rx_speed_desc[] = { > > > > + VIRTNET_STATS_DESC_RX(speed, ratelimit_packets), > > > > + VIRTNET_STATS_DESC_RX(speed, ratelimit_bytes), > > > > +}; > > > > + > > > > +static const struct virtnet_stat_desc virtnet_stats_tx_speed_desc[] = { > > > > + VIRTNET_STATS_DESC_TX(speed, ratelimit_packets), > > > > + VIRTNET_STATS_DESC_TX(speed, ratelimit_bytes), > > > > +}; > > > > + > > > > +#define VIRTNET_Q_TYPE_RX 0 > > > > +#define VIRTNET_Q_TYPE_TX 1 > > > > +#define VIRTNET_Q_TYPE_CQ 2 > > > > + > > > > +struct virtnet_stats_map { > > > > + /* The stat type in bitmap. */ > > > > + u64 stat_type; > > > > + > > > > + /* The bytes of the response for the stat. */ > > > > + u32 len; > > > > + > > > > + /* The num of the response fields for the stat. */ > > > > + u32 num; > > > > + > > > > + /* The type of queue corresponding to the statistics. (cq, rq, sq) */ > > > > + u32 queue_type; > > > > + > > > > + /* The reply type of the stat. */ > > > > + u8 reply_type; > > > > + > > > > + /* Describe the name and the offset in the response. */ > > > > + const struct virtnet_stat_desc *desc; > > > > +}; > > > > + > > > > +#define VIRTNET_DEVICE_STATS_MAP_ITEM(TYPE, type, queue_type) \ > > > > + { \ > > > > + VIRTIO_NET_STATS_TYPE_##TYPE, \ > > > > + sizeof(struct virtio_net_stats_ ## type), \ > > > > + ARRAY_SIZE(virtnet_stats_ ## type ##_desc), \ > > > > + VIRTNET_Q_TYPE_##queue_type, \ > > > > + VIRTIO_NET_STATS_TYPE_REPLY_##TYPE, \ > > > > + &virtnet_stats_##type##_desc[0] \ > > > > + } > > > > + > > > > +static struct virtnet_stats_map virtio_net_stats_map[] = { > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(CVQ, cvq, CQ), > > > > + > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(RX_BASIC, rx_basic, RX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(RX_CSUM, rx_csum, RX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(RX_GSO, rx_gso, RX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(RX_SPEED, rx_speed, RX), > > > > + > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(TX_BASIC, tx_basic, TX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(TX_CSUM, tx_csum, TX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(TX_GSO, tx_gso, TX), > > > > + VIRTNET_DEVICE_STATS_MAP_ITEM(TX_SPEED, tx_speed, TX), > > > > +}; > > > > > > I think the reason you did this is to ease the future extensions but > > > multiple levels of nested macros makes the code hard to review. Any > > > way to eliminate this? > > > > > > NOT only for the future extensions. > > > > When we parse the reply from the device, we need to check the reply stats > > one by one, we need the stats info to help parse the stats. > > Yes, but I meant for example any reason why it can't be done by > extending virtnet_stat_desc ? You know, virtio_net_stats_map is way to organize the descs. This is used to avoid the big if-else when parsing the replys from the device. If no this map, we will have a big if-else like: if (reply.type == rx_basic) { /* do the same something */ } if (reply.type == tx_basic) { /* do the same something */ } if (reply.type == rx_csum) { /* do the same something */ } if (reply.type == tx_csum) { /* do the same something */ } if (reply.type == rx_gso) { /* do the same something */ } if (reply.type == tx_gso) { /* do the same something */ } if (reply.type == rx_speed) { /* do the same something */ } if (reply.type == tx_speed) { /* do the same something */ } I want to avoid this, so introducing this map. YES. I noticed other comments, but I think we should fix this problem firstly. Thanks. > > > > > static void virtnet_fill_stats(struct virtnet_info *vi, u32 qid, > > struct virtnet_stats_ctx *ctx, > > const u8 *base, u8 type) > > { > > u32 queue_type, num_rx, num_tx, num_cq; > > struct virtnet_stats_map *m; > > u64 offset, bitmap; > > const __le64 *v; > > int i, j; > > > > num_rx = VIRTNET_RQ_STATS_LEN + ctx->desc_num[VIRTNET_Q_TYPE_RX]; > > num_tx = VIRTNET_SQ_STATS_LEN + ctx->desc_num[VIRTNET_Q_TYPE_TX]; > > num_cq = ctx->desc_num[VIRTNET_Q_TYPE_CQ]; > > > > queue_type = vq_type(vi, qid); > > bitmap = ctx->bitmap[queue_type]; > > offset = 0; > > > > if (queue_type == VIRTNET_Q_TYPE_TX) { > > offset = num_cq + num_rx * vi->curr_queue_pairs + num_tx * (qid / 2); > > offset += VIRTNET_SQ_STATS_LEN; > > } else if (queue_type == VIRTNET_Q_TYPE_RX) { > > offset = num_cq + num_rx * (qid / 2) + VIRTNET_RQ_STATS_LEN; > > } > > > > for (i = 0; i < ARRAY_SIZE(virtio_net_stats_map); ++i) { > > m = &virtio_net_stats_map[i]; > > > > -> if (m->stat_type & bitmap) > > offset += m->num; > > > > -> if (type != m->reply_type) > > continue; > > > > for (j = 0; j < m->num; ++j) { > > v = (const __le64 *)(base + m->desc[j].offset); > > ctx->data[offset + j] = le64_to_cpu(*v); > > } > > > > break; > > } > > } > > > > Thanks. > > Btw, just a reminder, there are other comments for this patch. > > Thanks >
