- 18 May, 2017 17 commits
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Holger Brunck authored
We can't assume that we are always in loopback mode if rx and tx clock have the same clock source. If we want to use HDLC busmode we also have the same clock source but we are not in loopback mode. So move the setting of the baudrate generator after the check for property for the loopback mode. Signed-off-by:
Holger Brunck <holger.brunck@keymile.com> Cc: Zhao Qiang <qiang.zhao@nxp.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Holger Brunck authored
We need space for the struct qe_bd and not for a pointer to this struct. Signed-off-by:
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Holger Brunck authored
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Holger Brunck authored
This fixes the following compiler warnings: drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_poll': warning: 'skb' may be used uninitialized in this function [-Wmaybe-uninitialized] skb->mac_header = skb->data - skb->head; and drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_probe': drivers/net/wan/fsl_ucc_hdlc.c:1127:3: warning: 'utdm' may be used uninitialized in this function [-Wmaybe-uninitialized] kfree(utdm); Signed-off-by:
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Holger Brunck authored
Some of the tracing seems to be remaining traces for basic driver development. They can be removed now, as they cause noisy printouts. Signed-off-by:
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Alexey Dobriyan authored
4 billion packet queue is something unthinkable so use 32-bit value for now. Space savings on x86_64: add/remove: 0/0 grow/shrink: 3/70 up/down: 16/-131 (-115) function old new delta change_tx_queue_len 94 108 +14 qdisc_create 1176 1177 +1 alloc_netdev_mqs 1124 1125 +1 xenvif_alloc 533 532 -1 x25_asy_setup 167 166 -1 ... tun_queue_resize 945 940 -5 pfifo_fast_enqueue 167 162 -5 qfq_init_qdisc 168 158 -10 tap_queue_resize 810 799 -11 transmit 719 698 -21 Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Colin Ian King authored
Function udp_skb_dtor_locked does not need to be in global scope so make it static to fix sparse warning: net/ipv4/udp.c: warning: symbol 'udp_skb_dtor_locked' was not declared. Should it be static? Fixes: 6dfb4367 ("udp: keep the sk_receive_queue held when splicing") Signed-off-by:
Colin Ian King <colin.king@canonical.com> Acked-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
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David S. Miller authored
Jason Wang says: ==================== vhost_net rx batch dequeuing This series tries to implement rx batching for vhost-net. This is done by batching the dequeuing from skb_array which was exported by underlayer socket and pass the sbk back through msg_control to finish userspace copying. This is also the requirement for more batching implemention on rx path. Tests shows at most 7.56% improvment bon rx pps on top of batch zeroing and no obvious changes for TCP_STREAM/TCP_RR result. Please review. Thanks Changes from V4: - drop batch zeroing patch - renew the performance numbers - move skb pointer array out of vhost_net structure Changes from V3: - add batch zeroing patch to fix the build warnings Changes from V2: - rebase to net-next HEAD - use unconsume helpers to put skb back on releasing - introduce and use vhost_net internal buffer helpers - renew performance numbers on top of batch zeroing Changes from V1: - switch to use for() in __ptr_ring_consume_batched() - rename peek_head_len_batched() to fetch_skbs() - use skb_array_consume_batched() instead of skb_array_consume_batched_bh() since no consumer run in bh - drop the lockless peeking patch since skb_array could be resized, so it's not safe to call lockless one ==================== Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Jason Wang authored
We used to dequeue one skb during recvmsg() from skb_array, this could be inefficient because of the bad cache utilization and spinlock touching for each packet. This patch tries to batch them by calling batch dequeuing helpers explicitly on the exported skb array and pass the skb back through msg_control for underlayer socket to finish the userspace copying. Batch dequeuing is also the requirement for more batching improvement on receive path. Tests were done by pktgen on tap with XDP1 in guest. Host is Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz. rx batch | pps 0 2.25Mpps 1 2.33Mpps (+3.56%) 4 2.33Mpps (+3.56%) 16 2.35Mpps (+4.44%) 64 2.42Mpps (+7.56%) <- Default rx batching 128 2.40Mpps (+6.67%) 256 2.38Mpps (+5.78%) Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
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Jason Wang authored
This patch makes tap_recvmsg() can receive from skb from its caller through msg_control. Vhost_net will be the first user. Signed-off-by:
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Jason Wang authored
This patch makes tun_recvmsg() can receive from skb from its caller through msg_control. Vhost_net will be the first user. Signed-off-by:
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Jason Wang authored
This patch exports skb_array through tap_get_skb_array(). Caller can then manipulate skb array directly. Signed-off-by:
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Jason Wang authored
This patch exports skb_array through tun_get_skb_array(). Caller can then manipulate skb array directly. Signed-off-by:
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Jason Wang authored
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Jason Wang authored
This patch introduce a batched version of consuming, consumer can dequeue more than one pointers from the ring at a time. We don't care about the reorder of reading here so no need for compiler barrier. Signed-off-by:
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Jason Wang authored
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Michael S. Tsirkin authored
Applications that consume a batch of entries in one go can benefit from ability to return some of them back into the ring. Add an API for that - assuming there's space. If there's no space naturally can't do this and have to drop entries, but this implies ring is full so we'd likely drop some anyway. Signed-off-by:
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- 17 May, 2017 23 commits
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David S. Miller authored
Andrew Lunn says: ==================== net: phy: marvell: Checkpatch cleanup I will be contributing a few new features to the Marvell PHY driver soon. Start by making the code mostly checkpatch clean. There should not be any functional changes. Just comments set into the correct format, missing blank lines, turn some comparisons around, and refactoring to reduce indentation depth. There is still one camel in the code, but it actually makes sense, so leave it in piece. ==================== Signed-off-by: -
Andrew Lunn authored
Fold lines longer than 80 characters Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
Makes the code a bit more readable, and solves quite a few checkpatch warnings of lines longer than 80 characters. Signed-off-by:
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Andrew Lunn authored
Break big functions up by using a number of smaller helper function. Solves some of the over 80 lines warnings, by reducing the indentation level. Signed-off-by:
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Andrew Lunn authored
Avoid multiple assignments Comparisons should place the constant on the right side of the test Signed-off-by:
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Andrew Lunn authored
Remove the extra blank lines, add one in where recommended. Signed-off-by:
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Andrew Lunn authored
Use net style comment blocks, and wrap one block with long lines. Signed-off-by:
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David S. Miller authored
Eric Dumazet says: ==================== tcp: TCP TS option use 1 ms clock TCP Timestamps option is defined in RFC 7323 Traditionally on linux, it has been tied to the internal 'jiffy' variable, because it had been a cheap and good enough generator. Unfortunately some distros use HZ=250 or even HZ=100 leading to not very useful TCP timestamps. For TCP flows in the DC, Google has used usec resolution for more than two years with great success [1]. RCVBUF autotuning is more precise. This series converts tp->tcp_mstamp to a plain u64 value storing a 1 usec TCP clock. This choice will allow us to upstream the 1 usec TS option as discussed in IETF 97. Kathleen Nichols [2] and others advocate for 1ms TS clocks for network analysis. (1ms being the lowest value supported by RFC 7323.) [1] https://www.ietf.org/proceedings/97/slides/slides-97-tcpm-tcp-options-for-low-latency-00.pdf [2] http://netseminar.stanford.edu/seminars/02_02_17.pdf ==================== Signed-off-by:
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Eric Dumazet authored
TCP Timestamps option is defined in RFC 7323 Traditionally on linux, it has been tied to the internal 'jiffies' variable, because it had been a cheap and good enough generator. For TCP flows on the Internet, 1 ms resolution would be much better than 4ms or 10ms (HZ=250 or HZ=100 respectively) For TCP flows in the DC, Google has used usec resolution for more than two years with great success [1] Receive size autotuning (DRS) is indeed more precise and converges faster to optimal window size. This patch converts tp->tcp_mstamp to a plain u64 value storing a 1 usec TCP clock. This choice will allow us to upstream the 1 usec TS option as discussed in IETF 97. [1] https://www.ietf.org/proceedings/97/slides/slides-97-tcpm-tcp-options-for-low-latency-00.pdfSigned-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
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Eric Dumazet authored
After this patch, all uses of tcp_time_stamp will require a change when we introduce 1 ms and/or 1 us TCP TS option. Signed-off-by:
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Eric Dumazet authored
tcp_time_stamp will become slightly more expensive soon, cache its value. Signed-off-by:
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Eric Dumazet authored
This CC does not need 1 ms tcp_time_stamp and can use the jiffy based 'timestamp'. Signed-off-by:
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Eric Dumazet authored
This place wants to use tcp_jiffies32, this is good enough. Signed-off-by:
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Eric Dumazet authored
tcp_time_stamp will no longer be tied to jiffies. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp, since tcp_time_stamp will soon be only used for TCP TS option. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp, since tcp_time_stamp will soon be only used for TCP TS option. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp, since tcp_time_stamp will soon be only used for TCP TS option. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp, since tcp_time_stamp will soon be only used for TCP TS option. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp to feed tp->snd_cwnd_stamp. tcp_time_stamp will soon be a litle bit more expensive than simply reading 'jiffies'. Signed-off-by:
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Eric Dumazet authored
Use tcp_jiffies32 instead of tcp_time_stamp to feed tp->lsndtime. tcp_time_stamp will soon be a litle bit more expensive than simply reading 'jiffies'. Signed-off-by:
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Eric Dumazet authored
Use our own macro instead of abusing tcp_time_stamp Signed-off-by:
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Eric Dumazet authored
We abuse tcp_time_stamp for two different cases : 1) base to generate TCP Timestamp options (RFC 7323) 2) A 32bit version of jiffies since some TCP fields are 32bit wide to save memory. Since we want in the future to have 1ms TCP TS clock, regardless of HZ value, we want to cleanup things. tcp_jiffies32 is the truncated jiffies value, which will be used only in places where we want a 'host' timestamp. Signed-off-by:
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Eric Dumazet authored
Idea is to later convert tp->tcp_mstamp to a full u64 counter using usec resolution, so that we can later have fine grained TCP TS clock (RFC 7323), regardless of HZ value. We try to refresh tp->tcp_mstamp only when necessary. Signed-off-by:
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