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Cleanup some comments

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Signed-off-by: Jesper D. Brouer <netoptimizer@brouer.com>
This commit is contained in:
Jesper D. Brouer
2020-11-28 14:02:52 +01:00
parent 516668c62c
commit 3e0ac4f24d
1 changed files with 4 additions and 28 deletions
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32
traffic-pacing-edt/edt_pacer02.c
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@@ -13,28 +13,7 @@ char _license[] SEC("license") = "GPL";
#define NS_PER_SEC 1000000000
//#define RATE_IN_BITS (998 * 1000 * 1000ULL)
/* Test different rates in production machine, and measure iperf3 TCP-goodput */
//#define RATE_IN_BITS (800 * 1000 * 1000ULL)// prod: 765 Mbits/sec (stable)
//#define RATE_IN_BITS (900 * 1000 * 1000ULL)// prod: 861 Mbits/sec (stable)
///#define RATE_IN_BITS (950 * 1000 * 1000ULL)// prod: 908 Mbits/sec (stable)
//#define RATE_IN_BITS (960 * 1000 * 1000ULL)// prod: 918 Mbits/sec
//#define RATE_IN_BITS (970 * 1000 * 1000ULL)// prod: 928 Mbits/sec
//#define RATE_IN_BITS (980 * 1000 * 1000ULL)// prod: 920 Mbits/sec (unstable)
//#define RATE_IN_BITS (990 * 1000 * 1000ULL)// prod: 920 Mbits/sec (unstable)
//#define RATE_IN_BITS (999 * 1000 * 1000ULL)// prod: (unstable)
/* Per packet overhead: two VLAN headers == 8 bytes
*
* skb->wire_len doesn't seem to take the two VLAN headers into
* account. Loading BPF-prog on VLAN net_device is can only see 1
* VLAN, and this is likely HW offloaded into skb->vlan.
*/
//#define OVERHEAD (8)
/* New strategy: Shape at MAC (Medium Access Control) layer with Ethernet
/* Strategy: Shape at MAC (Medium Access Control) layer with Ethernet
*
* Production use-case is pacing traffic at 1Gbit/s wirespeed, using a
* 10Gbit/s NIC, because 1G end-user switch cannot handle bursts.
@@ -57,18 +36,15 @@ char _license[] SEC("license") = "GPL";
//#define OVERHEAD (12 + 8 + 4) /* 14 already in wire_len */
#define ETH_MIN (84)
/* skb->len in bytes, thus easier to keep rate in bytes */
/* skb->len in bytes, thus convert rate to bytes */
#define RATE_IN_BYTES (RATE_IN_BITS / 8)
//#define T_HORIZON_DROP (2000 * 1000 * 1000ULL)
//#define T_HORIZON_DROP (200000 * 1000 * 1000ULL)
/* Controlling how large queue (in time) is allow to grow */
#define T_HORIZON_DROP (15 * 1000 * 1000ULL)
#define T_HORIZON_TARGET (10 * 1000 * 1000ULL)
#define T_HORIZON_ECN (5 * 1000 * 1000ULL)
/* Codel: If queue exceed target for more than one interval, start dropping */
#define T_EXCEED_INTERVAL (100 * 1000 * 1000ULL) /* 100 ms in ns*/
#define CODEL_TARGET T_HORIZON_TARGET