xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net_sched: add 64bit rate estimators

Browse Source 
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>
This commit is contained in:
Eric Dumazet
2013-06-06 08:43:22 -07:00
committed by David S. Miller
parent b41abb42bf
commit 45203a3b38
13 changed files with 54 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/uapi/linux/gen_stats.h
View File

@@ -9,6 +9,7 @@ enum {
TCA_STATS_RATE_EST,
TCA_STATS_QUEUE,
TCA_STATS_APP,
TCA_STATS_RATE_EST64,
__TCA_STATS_MAX,
};
#define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
@@ -37,6 +38,16 @@ struct gnet_stats_rate_est {
__u32 pps;
};
/**
* struct gnet_stats_rate_est64 - rate estimator
* @bps: current byte rate
* @pps: current packet rate
*/
struct gnet_stats_rate_est64 {
__u64 bps;
__u64 pps;
};
/**
* struct gnet_stats_queue - queuing statistics
* @qlen: queue length