45203a3b38
struct gnet_stats_rate_est contains u32 fields, so the bytes per second field can wrap at 34360Mbit. Add a new gnet_stats_rate_est64 structure to get 64bit bps/pps fields, and switch the kernel to use this structure natively. This structure is dumped to user space as a new attribute : TCA_STATS_RATE_EST64 Old tc command will now display the capped bps (to 34360Mbit), instead of wrapped values, and updated tc command will display correct information. Old tc command output, after patch : eric:~# tc -s -d qd sh dev lo qdisc pfifo 8001: root refcnt 2 limit 1000p Sent 80868245400 bytes 1978837 pkt (dropped 0, overlimits 0 requeues 0) rate 34360Mbit 189696pps backlog 0b 0p requeues 0 This patch carefully reorganizes "struct Qdisc" layout to get optimal performance on SMP. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#ifndef __LINUX_GEN_STATS_H
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#define __LINUX_GEN_STATS_H
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#include <linux/types.h>
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enum {
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TCA_STATS_UNSPEC,
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TCA_STATS_BASIC,
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TCA_STATS_RATE_EST,
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TCA_STATS_QUEUE,
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TCA_STATS_APP,
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TCA_STATS_RATE_EST64,
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__TCA_STATS_MAX,
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};
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#define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
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/**
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* struct gnet_stats_basic - byte/packet throughput statistics
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* @bytes: number of seen bytes
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* @packets: number of seen packets
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*/
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struct gnet_stats_basic {
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__u64 bytes;
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__u32 packets;
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};
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struct gnet_stats_basic_packed {
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__u64 bytes;
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__u32 packets;
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} __attribute__ ((packed));
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/**
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* struct gnet_stats_rate_est - rate estimator
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* @bps: current byte rate
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* @pps: current packet rate
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*/
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struct gnet_stats_rate_est {
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__u32 bps;
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__u32 pps;
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};
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/**
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* struct gnet_stats_rate_est64 - rate estimator
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* @bps: current byte rate
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* @pps: current packet rate
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*/
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struct gnet_stats_rate_est64 {
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__u64 bps;
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__u64 pps;
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};
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/**
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* struct gnet_stats_queue - queuing statistics
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* @qlen: queue length
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* @backlog: backlog size of queue
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* @drops: number of dropped packets
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* @requeues: number of requeues
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* @overlimits: number of enqueues over the limit
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*/
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struct gnet_stats_queue {
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__u32 qlen;
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__u32 backlog;
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__u32 drops;
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__u32 requeues;
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__u32 overlimits;
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};
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/**
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* struct gnet_estimator - rate estimator configuration
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* @interval: sampling period
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* @ewma_log: the log of measurement window weight
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*/
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struct gnet_estimator {
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signed char interval;
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unsigned char ewma_log;
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};
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#endif /* __LINUX_GEN_STATS_H */
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