On Wed, Jun 12, 2019 at 11:21 AM David Miller wrote:
>
> From: David Miller
> Date: Wed, 12 Jun 2019 11:03:44 -0700 (PDT)
>
> > Applied to net-next and build testing.
>
> Missing symbol export it seems...
>
> ERROR: "tcp_tx_delay_enabled" [net/ipv6/ipv6.ko] undefined!
> make[1]: *** [scripts/Make
From: David Miller
Date: Wed, 12 Jun 2019 11:03:44 -0700 (PDT)
> Applied to net-next and build testing.
Missing symbol export it seems...
ERROR: "tcp_tx_delay_enabled" [net/ipv6/ipv6.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:91: __modpost] Error 1
From: Eric Dumazet
Date: Mon, 10 Jun 2019 20:03:34 -0700
> Adding delays to TCP flows is crucial for studying behavior
> of TCP stacks, including congestion control modules.
>
> Linux offers netem module, but it has unpractical constraints :
> - Need root access to change qdisc
> - Hard to setup
On Tue, Jun 11, 2019 at 12:16 PM David Miller wrote:
>
> From: Eric Dumazet
> Date: Mon, 10 Jun 2019 20:03:34 -0700
>
> > This patchs adds TCP_TX_DELAY socket option, to set a delay in
> > usec units.
> >
> > unsigned int tx_delay = 1; /* 10 msec */
> >
> > setsockopt(fd, SOL_TCP, TCP_TX_
From: Eric Dumazet
Date: Mon, 10 Jun 2019 20:03:34 -0700
> This patchs adds TCP_TX_DELAY socket option, to set a delay in
> usec units.
>
> unsigned int tx_delay = 1; /* 10 msec */
>
> setsockopt(fd, SOL_TCP, TCP_TX_DELAY, &tx_delay, sizeof(tx_delay));
I'm trying to think about what th
Adding delays to TCP flows is crucial for studying behavior
of TCP stacks, including congestion control modules.
Linux offers netem module, but it has unpractical constraints :
- Need root access to change qdisc
- Hard to setup on egress if combined with non trivial qdisc like FQ
- Single delay fo
