• Eric Dumazet's avatar
    net_sched: add 64bit rate estimators · 45203a3b
    Eric Dumazet authored
    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 :
    Old tc command will now display the capped bps (to 34360Mbit), instead
    of wrapped values, and updated tc command will display correct
    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: default avatarEric Dumazet <edumazet@google.com>
    Cc: Ben Hutchings <bhutchings@solarflare.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
gen_stats.h 1.74 KB