[dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

Hello,

I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.

I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't
have any provision to set it for Jumbo frame.
Can you please suggest how to configure Jumbo frame in pktgen ?

In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
*lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
During testing, I could not send packet size more than 1500 byte.
What is the suggestion to overcome this problem ?

Regards,
N. Sarkar

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Roberts, Lee A.]

Nirmal,

Here are the changes that I've been using to allow jumbo frames with dpdk-19.08 and
pktgen-19.10.0:

diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
462c462
< #define	RTE_MBUF_DEFAULT_DATAROOM	2048
---
> #define	RTE_MBUF_DEFAULT_DATAROOM	9600
diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-19.08/lib/librte_net/rte_ether.h
33c33
< #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including CRC. */
---
> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including CRC. */
diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-19.10.0/app/pktgen.c
749c749
< 	else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
---
> 	else if ( (plen >= 1024) && (plen <= 1518))
753c753
< 	else if (plen > PG_ETHER_MAX_LEN)
---
> 	else if (plen > 1518)
diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-19.10.0/lib/common/pg_inet.h
379,380c379,380
< #define ETH_MTU                     1500	/* Max MTU for Ethernet */
< #define ETH_MAX_PKT                 1518	/* Max Ethernet frame size */
---
> #define ETH_MTU                     9600	/* Max MTU for Ethernet */
> #define ETH_MAX_PKT                 9600	/* Max Ethernet frame size */

                                   - Lee Roberts


-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
Sent: Monday, November 18, 2019 10:26 AM
To: dev@dpdk.org
Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

Hello,

I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.

I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't have any provision to set it for Jumbo frame.
Can you please suggest how to configure Jumbo frame in pktgen ?

In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [ *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
During testing, I could not send packet size more than 1500 byte.
What is the suggestion to overcome this problem ?

Regards,
N. Sarkar

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Morten Brørup]

John, Marko,

It seems we are missing documentation about enabling Jumbo frames in an application, and possibly an example of using the rte_eth_dev_info->max_mtu.


Med venlig hilsen / kind regards
- Morten Brørup

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
> Sent: Tuesday, November 19, 2019 6:42 PM
> To: Nirmal Sarkar; dev@dpdk.org
> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> 
> Nirmal,
> 
> Here are the changes that I've been using to allow jumbo frames with dpdk-
> 19.08 and
> pktgen-19.10.0:
> 
> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
> 19.08/lib/librte_mbuf/rte_mbuf.h
> 462c462
> < #define	RTE_MBUF_DEFAULT_DATAROOM	2048
> ---
> > #define	RTE_MBUF_DEFAULT_DATAROOM	9600
> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
> 19.08/lib/librte_net/rte_ether.h
> 33c33
> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including CRC.
> */
> ---
> > #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including CRC.
> */
> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
> 19.10.0/app/pktgen.c
> 749c749
> < 	else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> ---
> > 	else if ( (plen >= 1024) && (plen <= 1518))
> 753c753
> < 	else if (plen > PG_ETHER_MAX_LEN)
> ---
> > 	else if (plen > 1518)
> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
> 19.10.0/lib/common/pg_inet.h
> 379,380c379,380
> < #define ETH_MTU                     1500	/* Max MTU for Ethernet */
> < #define ETH_MAX_PKT                 1518	/* Max Ethernet frame size */
> ---
> > #define ETH_MTU                     9600	/* Max MTU for Ethernet */
> > #define ETH_MAX_PKT                 9600	/* Max Ethernet frame size */
> 
>                                    - Lee Roberts
> 
> 
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> Sent: Monday, November 18, 2019 10:26 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> 
> Hello,
> 
> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> 
> I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't
> have any provision to set it for Jumbo frame.
> Can you please suggest how to configure Jumbo frame in pktgen ?
> 
> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> During testing, I could not send packet size more than 1500 byte.
> What is the suggestion to overcome this problem ?
> 
> Regards,
> N. Sarkar

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

[-- Attachment #1: Type: text/plain, Size: 3416 bytes --]

Hello,

Thanks for the help.
As I'm using DPDK-18.11.1, I did not find the definition of
"RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file.
So I set "ETHER_MAX_LEN" value to 9600.
Apart from that I took rest of the changes and with these I'm able to send
jumbo frame.
Took tcpdump on the receiving end.

Suddenly I got stuck at ARP. I could not send packets anymore.

I've attached success & failure scenario.

Regards,
N. Sarkar

On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup <mb@smartsharesystems.com>
wrote:

> John, Marko,
>
> It seems we are missing documentation about enabling Jumbo frames in an
> application, and possibly an example of using the rte_eth_dev_info->max_mtu.
>
>
> Med venlig hilsen / kind regards
> - Morten Brørup
>
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
> > Sent: Tuesday, November 19, 2019 6:42 PM
> > To: Nirmal Sarkar; dev@dpdk.org
> > Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >
> > Nirmal,
> >
> > Here are the changes that I've been using to allow jumbo frames with
> dpdk-
> > 19.08 and
> > pktgen-19.10.0:
> >
> > diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
> > 19.08/lib/librte_mbuf/rte_mbuf.h
> > 462c462
> > < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
> > ---
> > > #define     RTE_MBUF_DEFAULT_DATAROOM       9600
> > diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
> > 19.08/lib/librte_net/rte_ether.h
> > 33c33
> > < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
> CRC.
> > */
> > ---
> > > #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
> CRC.
> > */
> > diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
> > 19.10.0/app/pktgen.c
> > 749c749
> > <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> > ---
> > >     else if ( (plen >= 1024) && (plen <= 1518))
> > 753c753
> > <     else if (plen > PG_ETHER_MAX_LEN)
> > ---
> > >     else if (plen > 1518)
> > diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
> > 19.10.0/lib/common/pg_inet.h
> > 379,380c379,380
> > < #define ETH_MTU                     1500    /* Max MTU for Ethernet */
> > < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame size
> */
> > ---
> > > #define ETH_MTU                     9600    /* Max MTU for Ethernet */
> > > #define ETH_MAX_PKT                 9600    /* Max Ethernet frame size
> */
> >
> >                                    - Lee Roberts
> >
> >
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> > Sent: Monday, November 18, 2019 10:26 AM
> > To: dev@dpdk.org
> > Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >
> > Hello,
> >
> > I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> >
> > I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't
> > have any provision to set it for Jumbo frame.
> > Can you please suggest how to configure Jumbo frame in pktgen ?
> >
> > In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> > *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> > During testing, I could not send packet size more than 1500 byte.
> > What is the suggestion to overcome this problem ?
> >
> > Regards,
> > N. Sarkar
>

[-- Attachment #2: success.txt --]
[-- Type: text/plain, Size: 1703 bytes --]

** Version: DPDK 18.11.1, Command Line Interface without timers
Pktgen:/>
/ Ports 0-0 of 1   <Main Page>  Copyright (c) <2010-2019>, Intel Corporation
  Flags:Port        : P------Range       :0
Link State          :         <UP-10000-FD>      ---Total Rate---
Pkts/s Max/Rx       :                   2/1                   2/1
       Max/Tx       :           20838/19244           20838/19244
MBits/s Rx/Tx       :                0/1384                0/1384
Broadcast           :                     0
Multicast           :                    10
Sizes 64            :                    12
      65-127        :                     0
      128-255       :                     0
      256-511       :                     0
      512-1023      :                     0
      1024-1518     :                     0
Runts/Jumbos        :                   0/0
ARP/ICMP Pkts       :                  10/0
Errors Rx/Tx        :                   0/0
Total Rx Pkts       :                    11
      Tx Pkts       :                179640
      Rx MBs        :                     0
      Tx MBs        :                 12922
                    :
Pattern Type        :               abcd...
Tx Count/% Rate     :         Forever /100%
Pkt Size/Tx Burst   :           8972 /   64
TTL/Port Src/Dest   :         4/ 1000/ 1000
Pkt Type:VLAN ID    :       IPv4 / UDP:0001
802.1p CoS/DSCP/IPP :             0/  0/  0
VxLAN Flg/Grp/vid   :      0000/    0/    0
IP  Destination     :         192.168.168.4
    Source          :      192.168.168.3/24
MAC Destination     :     00:50:56:9b:ba:ae
    Source          :     00:50:56:9b:ef:53
PCI Vendor/Addr     :     15ad:07b0/0b:00.0

[-- Attachment #3: failure.txt --]
[-- Type: text/plain, Size: 1703 bytes --]

** Version: DPDK 18.11.1, Command Line Interface without timers
Pktgen:/>
| Ports 0-0 of 1   <Main Page>  Copyright (c) <2010-2019>, Intel Corporation
  Flags:Port        : P------Range       :0
Link State          :         <UP-10000-FD>      ---Total Rate---
Pkts/s Max/Rx       :                   2/1                   2/1
       Max/Tx       :         169576/167952         169576/167952
MBits/s Rx/Tx       :                0/1907                0/1907
Broadcast           :                     0
Multicast           :                   129
Sizes 64            :                   131
      65-127        :                     0
      128-255       :                     0
      256-511       :                     0
      512-1023      :                     0
      1024-1518     :                     0
Runts/Jumbos        :                   0/0
ARP/ICMP Pkts       :                 129/0
Errors Rx/Tx        :                   0/0
Total Rx Pkts       :                   131
      Tx Pkts       :              21803360
      Rx MBs        :                     0
      Tx MBs        :                247686
                    :
Pattern Type        :               abcd...
Tx Count/% Rate     :         Forever /100%
Pkt Size/Tx Burst   :           1400 /   64
TTL/Port Src/Dest   :         4/ 1000/ 1000
Pkt Type:VLAN ID    :       IPv4 / UDP:0001
802.1p CoS/DSCP/IPP :             0/  0/  0
VxLAN Flg/Grp/vid   :      0000/    0/    0
IP  Destination     :         192.168.168.4
    Source          :      192.168.168.3/24
MAC Destination     :     00:50:56:9b:ba:ae
    Source          :     00:50:56:9b:ef:53
PCI Vendor/Addr     :     15ad:07b0/0b:00.0

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Wiles, Keith]

> On Nov 20, 2019, at 6:09 AM, Nirmal Sarkar <nirmal.kisan@gmail.com> wrote:
> 
> Hello,
> 
> Thanks for the help.
> As I'm using DPDK-18.11.1, I did not find the definition of
> "RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file.
> So I set "ETHER_MAX_LEN" value to 9600.
> Apart from that I took rest of the changes and with these I'm able to send
> jumbo frame.
> Took tcpdump on the receiving end.
> 
> Suddenly I got stuck at ARP. I could not send packets anymore.

Sorry, I can not tell what the error condition is you are hitting, as the two screen dumps do not provide me where I should start looking. If you can help me understand the issue better.
> 
> I've attached success & failure scenario.
> 
> Regards,
> N. Sarkar
> 
> On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup <mb@smartsharesystems.com>
> wrote:
> 
>> John, Marko,
>> 
>> It seems we are missing documentation about enabling Jumbo frames in an
>> application, and possibly an example of using the rte_eth_dev_info->max_mtu.
>> 
>> 
>> Med venlig hilsen / kind regards
>> - Morten Brørup
>> 
>>> -----Original Message-----
>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
>>> Sent: Tuesday, November 19, 2019 6:42 PM
>>> To: Nirmal Sarkar; dev@dpdk.org
>>> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
>>> 
>>> Nirmal,
>>> 
>>> Here are the changes that I've been using to allow jumbo frames with
>> dpdk-
>>> 19.08 and
>>> pktgen-19.10.0:
>>> 
>>> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
>>> 19.08/lib/librte_mbuf/rte_mbuf.h
>>> 462c462
>>> < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
>>> ---
>>>> #define     RTE_MBUF_DEFAULT_DATAROOM       9600
>>> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
>>> 19.08/lib/librte_net/rte_ether.h
>>> 33c33
>>> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
>> CRC.
>>> */
>>> ---
>>>> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
>> CRC.
>>> */
>>> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
>>> 19.10.0/app/pktgen.c
>>> 749c749
>>> <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
>>> ---
>>>>    else if ( (plen >= 1024) && (plen <= 1518))
>>> 753c753
>>> <     else if (plen > PG_ETHER_MAX_LEN)
>>> ---
>>>>    else if (plen > 1518)
>>> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
>>> 19.10.0/lib/common/pg_inet.h
>>> 379,380c379,380
>>> < #define ETH_MTU                     1500    /* Max MTU for Ethernet */
>>> < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame size
>> */
>>> ---
>>>> #define ETH_MTU                     9600    /* Max MTU for Ethernet */
>>>> #define ETH_MAX_PKT                 9600    /* Max Ethernet frame size
>> */
>>> 
>>>                                   - Lee Roberts
>>> 
>>> 
>>> -----Original Message-----
>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
>>> Sent: Monday, November 18, 2019 10:26 AM
>>> To: dev@dpdk.org
>>> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
>>> 
>>> Hello,
>>> 
>>> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
>>> 
>>> I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't
>>> have any provision to set it for Jumbo frame.
>>> Can you please suggest how to configure Jumbo frame in pktgen ?
>>> 
>>> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
>>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
>>> During testing, I could not send packet size more than 1500 byte.
>>> What is the suggestion to overcome this problem ?
>>> 
>>> Regards,
>>> N. Sarkar
>> 
> <success.txt><failure.txt>

Regards,
Keith

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

Hello,

To support Jumbo frame in dpdk-pktgen,  changes were suggested in dpdk
libraries also apart from pktgen code.

*lib/librte_mbuf/rte_mbuf.h *
*lib/common/pg_inet.h *

But dpdk framework already supports jumbo frame [using *--enable-jumbo* &
*--max-pkt-len* flag].
Can you please help me to understand why do we need to change the libraries
in dpdk ?

Regards,
N. Sarkar

On Thu, Nov 21, 2019 at 12:24 AM Wiles, Keith <keith.wiles@intel.com> wrote:

>
>
> > On Nov 20, 2019, at 6:09 AM, Nirmal Sarkar <nirmal.kisan@gmail.com>
> wrote:
> >
> > Hello,
> >
> > Thanks for the help.
> > As I'm using DPDK-18.11.1, I did not find the definition of
> > "RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file.
> > So I set "ETHER_MAX_LEN" value to 9600.
> > Apart from that I took rest of the changes and with these I'm able to
> send
> > jumbo frame.
> > Took tcpdump on the receiving end.
> >
> > Suddenly I got stuck at ARP. I could not send packets anymore.
>
> Sorry, I can not tell what the error condition is you are hitting, as the
> two screen dumps do not provide me where I should start looking. If you can
> help me understand the issue better.
> >
> > I've attached success & failure scenario.
> >
> > Regards,
> > N. Sarkar
> >
> > On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup <mb@smartsharesystems.com>
> > wrote:
> >
> >> John, Marko,
> >>
> >> It seems we are missing documentation about enabling Jumbo frames in an
> >> application, and possibly an example of using the
> rte_eth_dev_info->max_mtu.
> >>
> >>
> >> Med venlig hilsen / kind regards
> >> - Morten Brørup
> >>
> >>> -----Original Message-----
> >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
> >>> Sent: Tuesday, November 19, 2019 6:42 PM
> >>> To: Nirmal Sarkar; dev@dpdk.org
> >>> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >>>
> >>> Nirmal,
> >>>
> >>> Here are the changes that I've been using to allow jumbo frames with
> >> dpdk-
> >>> 19.08 and
> >>> pktgen-19.10.0:
> >>>
> >>> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
> >>> 19.08/lib/librte_mbuf/rte_mbuf.h
> >>> 462c462
> >>> < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
> >>> ---
> >>>> #define     RTE_MBUF_DEFAULT_DATAROOM       9600
> >>> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
> >>> 19.08/lib/librte_net/rte_ether.h
> >>> 33c33
> >>> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
> >> CRC.
> >>> */
> >>> ---
> >>>> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
> >> CRC.
> >>> */
> >>> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
> >>> 19.10.0/app/pktgen.c
> >>> 749c749
> >>> <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> >>> ---
> >>>>    else if ( (plen >= 1024) && (plen <= 1518))
> >>> 753c753
> >>> <     else if (plen > PG_ETHER_MAX_LEN)
> >>> ---
> >>>>    else if (plen > 1518)
> >>> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
> >>> 19.10.0/lib/common/pg_inet.h
> >>> 379,380c379,380
> >>> < #define ETH_MTU                     1500    /* Max MTU for Ethernet
> */
> >>> < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame
> size
> >> */
> >>> ---
> >>>> #define ETH_MTU                     9600    /* Max MTU for Ethernet */
> >>>> #define ETH_MAX_PKT                 9600    /* Max Ethernet frame size
> >> */
> >>>
> >>>                                   - Lee Roberts
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> >>> Sent: Monday, November 18, 2019 10:26 AM
> >>> To: dev@dpdk.org
> >>> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >>>
> >>> Hello,
> >>>
> >>> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> >>>
> >>> I'm using ubuntu-18.04 system where pktgen is a kernel module and I
> don't
> >>> have any provision to set it for Jumbo frame.
> >>> Can you please suggest how to configure Jumbo frame in pktgen ?
> >>>
> >>> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> >>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> >>> During testing, I could not send packet size more than 1500 byte.
> >>> What is the suggestion to overcome this problem ?
> >>>
> >>> Regards,
> >>> N. Sarkar
> >>
> > <success.txt><failure.txt>
>
> Regards,
> Keith
>
>

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Wiles, Keith]

> On Nov 26, 2019, at 2:21 AM, Nirmal Sarkar <nirmal.kisan@gmail.com> wrote:
> 
> Hello,
> 
> To support Jumbo frame in dpdk-pktgen,  changes were suggested in dpdk libraries also apart from pktgen code.
> lib/librte_mbuf/rte_mbuf.h 
> lib/common/pg_inet.h  
> 
> But dpdk framework already supports jumbo frame [using --enable-jumbo & --max-pkt-len flag]. 
> Can you please help me to understand why do we need to change the libraries in dpdk ?

These flags are for l3fwd type example apps and not a flag in the EAL or core code.

It appears the the port configs needs to be changed to enable jumbo frames. The patch below seemed to work for Lee and I have not tried the patch changes.
> 
> Regards,
> N. Sarkar
> 
> On Thu, Nov 21, 2019 at 12:24 AM Wiles, Keith <keith.wiles@intel.com> wrote:
> 
> 
> > On Nov 20, 2019, at 6:09 AM, Nirmal Sarkar <nirmal.kisan@gmail.com> wrote:
> > 
> > Hello,
> > 
> > Thanks for the help.
> > As I'm using DPDK-18.11.1, I did not find the definition of
> > "RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file.
> > So I set "ETHER_MAX_LEN" value to 9600.
> > Apart from that I took rest of the changes and with these I'm able to send
> > jumbo frame.
> > Took tcpdump on the receiving end.
> > 
> > Suddenly I got stuck at ARP. I could not send packets anymore.
> 
> Sorry, I can not tell what the error condition is you are hitting, as the two screen dumps do not provide me where I should start looking. If you can help me understand the issue better.
> > 
> > I've attached success & failure scenario.
> > 
> > Regards,
> > N. Sarkar
> > 
> > On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup <mb@smartsharesystems.com>
> > wrote:
> > 
> >> John, Marko,
> >> 
> >> It seems we are missing documentation about enabling Jumbo frames in an
> >> application, and possibly an example of using the rte_eth_dev_info->max_mtu.
> >> 
> >> 
> >> Med venlig hilsen / kind regards
> >> - Morten Brørup
> >> 
> >>> -----Original Message-----
> >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
> >>> Sent: Tuesday, November 19, 2019 6:42 PM
> >>> To: Nirmal Sarkar; dev@dpdk.org
> >>> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >>> 
> >>> Nirmal,
> >>> 
> >>> Here are the changes that I've been using to allow jumbo frames with
> >> dpdk-
> >>> 19.08 and
> >>> pktgen-19.10.0:
> >>> 
> >>> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
> >>> 19.08/lib/librte_mbuf/rte_mbuf.h
> >>> 462c462
> >>> < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
> >>> ---
> >>>> #define     RTE_MBUF_DEFAULT_DATAROOM       9600
> >>> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
> >>> 19.08/lib/librte_net/rte_ether.h
> >>> 33c33
> >>> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
> >> CRC.
> >>> */
> >>> ---
> >>>> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
> >> CRC.
> >>> */
> >>> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
> >>> 19.10.0/app/pktgen.c
> >>> 749c749
> >>> <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> >>> ---
> >>>>    else if ( (plen >= 1024) && (plen <= 1518))
> >>> 753c753
> >>> <     else if (plen > PG_ETHER_MAX_LEN)
> >>> ---
> >>>>    else if (plen > 1518)
> >>> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
> >>> 19.10.0/lib/common/pg_inet.h
> >>> 379,380c379,380
> >>> < #define ETH_MTU                     1500    /* Max MTU for Ethernet */
> >>> < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame size
> >> */
> >>> ---
> >>>> #define ETH_MTU                     9600    /* Max MTU for Ethernet */
> >>>> #define ETH_MAX_PKT                 9600    /* Max Ethernet frame size
> >> */
> >>> 
> >>>                                   - Lee Roberts
> >>> 
> >>> 
> >>> -----Original Message-----
> >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> >>> Sent: Monday, November 18, 2019 10:26 AM
> >>> To: dev@dpdk.org
> >>> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >>> 
> >>> Hello,
> >>> 
> >>> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> >>> 
> >>> I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't
> >>> have any provision to set it for Jumbo frame.
> >>> Can you please suggest how to configure Jumbo frame in pktgen ?
> >>> 
> >>> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> >>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> >>> During testing, I could not send packet size more than 1500 byte.
> >>> What is the suggestion to overcome this problem ?
> >>> 
> >>> Regards,
> >>> N. Sarkar
> >> 
> > <success.txt><failure.txt>
> 
> Regards,
> Keith
> 

Regards,
Keith

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

Hello,

Thanks for your reply.

Using *testpmd* [*--mbuf-size=2048 --max-pkt-len=9600*], I can send/receive
Jumbo pkt over vmxnet3 without any change in the dpdk source code.
Ref: https://doc.dpdk.org/dts/test_plans/jumboframes_test_plan.html

Can you please tell me why I will not be able to send jumbo packet from
pktgen without doing any change in dpdk/EAL ?

Regards,
N. Sarkar

On Wed, Nov 27, 2019 at 8:42 PM Wiles, Keith <keith.wiles@intel.com> wrote:

>
>
> > On Nov 26, 2019, at 2:21 AM, Nirmal Sarkar <nirmal.kisan@gmail.com>
> wrote:
> >
> > Hello,
> >
> > To support Jumbo frame in dpdk-pktgen,  changes were suggested in dpdk
> libraries also apart from pktgen code.
> > lib/librte_mbuf/rte_mbuf.h
> > lib/common/pg_inet.h
> >
> > But dpdk framework already supports jumbo frame [using --enable-jumbo &
> --max-pkt-len flag].
> > Can you please help me to understand why do we need to change the
> libraries in dpdk ?
>
> These flags are for l3fwd type example apps and not a flag in the EAL or
> core code.
>
> It appears the the port configs needs to be changed to enable jumbo
> frames. The patch below seemed to work for Lee and I have not tried the
> patch changes.
> >
> > Regards,
> > N. Sarkar
> >
> > On Thu, Nov 21, 2019 at 12:24 AM Wiles, Keith <keith.wiles@intel.com>
> wrote:
> >
> >
> > > On Nov 20, 2019, at 6:09 AM, Nirmal Sarkar <nirmal.kisan@gmail.com>
> wrote:
> > >
> > > Hello,
> > >
> > > Thanks for the help.
> > > As I'm using DPDK-18.11.1, I did not find the definition of
> > > "RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file.
> > > So I set "ETHER_MAX_LEN" value to 9600.
> > > Apart from that I took rest of the changes and with these I'm able to
> send
> > > jumbo frame.
> > > Took tcpdump on the receiving end.
> > >
> > > Suddenly I got stuck at ARP. I could not send packets anymore.
> >
> > Sorry, I can not tell what the error condition is you are hitting, as
> the two screen dumps do not provide me where I should start looking. If you
> can help me understand the issue better.
> > >
> > > I've attached success & failure scenario.
> > >
> > > Regards,
> > > N. Sarkar
> > >
> > > On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup <
> mb@smartsharesystems.com>
> > > wrote:
> > >
> > >> John, Marko,
> > >>
> > >> It seems we are missing documentation about enabling Jumbo frames in
> an
> > >> application, and possibly an example of using the
> rte_eth_dev_info->max_mtu.
> > >>
> > >>
> > >> Med venlig hilsen / kind regards
> > >> - Morten Brørup
> > >>
> > >>> -----Original Message-----
> > >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roberts, Lee A.
> > >>> Sent: Tuesday, November 19, 2019 6:42 PM
> > >>> To: Nirmal Sarkar; dev@dpdk.org
> > >>> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> > >>>
> > >>> Nirmal,
> > >>>
> > >>> Here are the changes that I've been using to allow jumbo frames with
> > >> dpdk-
> > >>> 19.08 and
> > >>> pktgen-19.10.0:
> > >>>
> > >>> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-
> > >>> 19.08/lib/librte_mbuf/rte_mbuf.h
> > >>> 462c462
> > >>> < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
> > >>> ---
> > >>>> #define     RTE_MBUF_DEFAULT_DATAROOM       9600
> > >>> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-
> > >>> 19.08/lib/librte_net/rte_ether.h
> > >>> 33c33
> > >>> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
> > >> CRC.
> > >>> */
> > >>> ---
> > >>>> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
> > >> CRC.
> > >>> */
> > >>> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-
> > >>> 19.10.0/app/pktgen.c
> > >>> 749c749
> > >>> <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> > >>> ---
> > >>>>    else if ( (plen >= 1024) && (plen <= 1518))
> > >>> 753c753
> > >>> <     else if (plen > PG_ETHER_MAX_LEN)
> > >>> ---
> > >>>>    else if (plen > 1518)
> > >>> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-
> > >>> 19.10.0/lib/common/pg_inet.h
> > >>> 379,380c379,380
> > >>> < #define ETH_MTU                     1500    /* Max MTU for
> Ethernet */
> > >>> < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame
> size
> > >> */
> > >>> ---
> > >>>> #define ETH_MTU                     9600    /* Max MTU for Ethernet
> */
> > >>>> #define ETH_MAX_PKT                 9600    /* Max Ethernet frame
> size
> > >> */
> > >>>
> > >>>                                   - Lee Roberts
> > >>>
> > >>>
> > >>> -----Original Message-----
> > >>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> > >>> Sent: Monday, November 18, 2019 10:26 AM
> > >>> To: dev@dpdk.org
> > >>> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> > >>>
> > >>> Hello,
> > >>>
> > >>> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> > >>>
> > >>> I'm using ubuntu-18.04 system where pktgen is a kernel module and I
> don't
> > >>> have any provision to set it for Jumbo frame.
> > >>> Can you please suggest how to configure Jumbo frame in pktgen ?
> > >>>
> > >>> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> > >>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> > >>> During testing, I could not send packet size more than 1500 byte.
> > >>> What is the suggestion to overcome this problem ?
> > >>>
> > >>> Regards,
> > >>> N. Sarkar
> > >>
> > > <success.txt><failure.txt>
> >
> > Regards,
> > Keith
> >
>
> Regards,
> Keith
>
>

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Wiles, Keith]

> On Nov 19, 2019, at 11:42 AM, Roberts, Lee A. <lee.roberts@hpe.com> wrote:
> 
> Nirmal,
> 
> Here are the changes that I've been using to allow jumbo frames with dpdk-19.08 and
> pktgen-19.10.0:
> 
> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
> 462c462
> < #define	RTE_MBUF_DEFAULT_DATAROOM	2048
> ---
>> #define	RTE_MBUF_DEFAULT_DATAROOM	9600
> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk-19.08/lib/librte_net/rte_ether.h
> 33c33
> < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including CRC. */
> ---
>> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including CRC. */
> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen-19.10.0/app/pktgen.c
> 749c749
> < 	else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> ---
>> 	else if ( (plen >= 1024) && (plen <= 1518))
> 753c753
> < 	else if (plen > PG_ETHER_MAX_LEN)
> ---
>> 	else if (plen > 1518)
> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen-19.10.0/lib/common/pg_inet.h
> 379,380c379,380
> < #define ETH_MTU                     1500	/* Max MTU for Ethernet */
> < #define ETH_MAX_PKT                 1518	/* Max Ethernet frame size */
> ---
>> #define ETH_MTU                     9600	/* Max MTU for Ethernet */
>> #define ETH_MAX_PKT                 9600	/* Max Ethernet frame size */
> 
>                                   - Lee Roberts

I have a updated pktgen with jumbo support. You need to pass the -j option to get jumbo frame support in pktgen. I have not done a lot of testing on this version. If you have time please pull the pktgen repo and switch over to the ‘dev’ branch and see if this work for you. I did not use your changes here and did it my way :-)

I did not change DPDK, as it seemed like it did not matter if RTE_MBUF_DEFAULT_DATAROOM changed. I am sure someplace may care if they used that define.

> 
> 
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> Sent: Monday, November 18, 2019 10:26 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> 
> Hello,
> 
> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> 
> I'm using ubuntu-18.04 system where pktgen is a kernel module and I don't have any provision to set it for Jumbo frame.
> Can you please suggest how to configure Jumbo frame in pktgen ?
> 
> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [ *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> During testing, I could not send packet size more than 1500 byte.
> What is the suggestion to overcome this problem ?
> 
> Regards,
> N. Sarkar

Regards,
Keith

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

Hello Keith,

Thanks a lot for your help.
I'm using pktgen-3.7.1. So I'll pull your changes there and check it.

Regards,
N. Sarkar

On Sat, Nov 30, 2019 at 5:31 AM Wiles, Keith <keith.wiles@intel.com> wrote:

>
>
> > On Nov 19, 2019, at 11:42 AM, Roberts, Lee A. <lee.roberts@hpe.com>
> wrote:
> >
> > Nirmal,
> >
> > Here are the changes that I've been using to allow jumbo frames with
> dpdk-19.08 and
> > pktgen-19.10.0:
> >
> > diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
> jumbo/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
> > 462c462
> > < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
> > ---
> >> #define      RTE_MBUF_DEFAULT_DATAROOM       9600
> > diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h
> jumbo/dpdk-19.08/lib/librte_net/rte_ether.h
> > 33c33
> > < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
> CRC. */
> > ---
> >> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
> CRC. */
> > diff -r default/pktgen-19.10.0/app/pktgen.c
> jumbo/pktgen-19.10.0/app/pktgen.c
> > 749c749
> > <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
> > ---
> >>      else if ( (plen >= 1024) && (plen <= 1518))
> > 753c753
> > <     else if (plen > PG_ETHER_MAX_LEN)
> > ---
> >>      else if (plen > 1518)
> > diff -r default/pktgen-19.10.0/lib/common/pg_inet.h
> jumbo/pktgen-19.10.0/lib/common/pg_inet.h
> > 379,380c379,380
> > < #define ETH_MTU                     1500    /* Max MTU for Ethernet */
> > < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame size
> */
> > ---
> >> #define ETH_MTU                     9600     /* Max MTU for Ethernet */
> >> #define ETH_MAX_PKT                 9600     /* Max Ethernet frame size
> */
> >
> >                                   - Lee Roberts
>
> I have a updated pktgen with jumbo support. You need to pass the -j option
> to get jumbo frame support in pktgen. I have not done a lot of testing on
> this version. If you have time please pull the pktgen repo and switch over
> to the ‘dev’ branch and see if this work for you. I did not use your
> changes here and did it my way :-)
>
> I did not change DPDK, as it seemed like it did not matter if
> RTE_MBUF_DEFAULT_DATAROOM changed. I am sure someplace may care if they
> used that define.
>
> >
> >
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
> > Sent: Monday, November 18, 2019 10:26 AM
> > To: dev@dpdk.org
> > Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
> >
> > Hello,
> >
> > I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
> >
> > I'm using ubuntu-18.04 system where pktgen is a kernel module and I
> don't have any provision to set it for Jumbo frame.
> > Can you please suggest how to configure Jumbo frame in pktgen ?
> >
> > In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
> > During testing, I could not send packet size more than 1500 byte.
> > What is the suggestion to overcome this problem ?
> >
> > Regards,
> > N. Sarkar
>
> Regards,
> Keith
>
>

Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar]

Hi Keith,

I've taken all the changes [in pktgen-3.7.1] you made to support Jumbo
Frame.

I'm sending packet of 9000 bytes from the sender. [sending screenshot
attached].

In the receiver side:
(1) started testpmd:
[ testpmd -c 0x0f -n 2 -b 03:00.0 -- -i --rxd=1024 --txd=1024 --burst=144
--txpt=32 --txht=0 --txfreet=0 --rxfreet=64 --mbcache=200 --portmask=0x3
--mbuf-size=2048 --max-pkt-len=9600 ]
Now if I do a "show port stats 0", I see "RX-missed" is getting increased
where as "RX-bytes" is stuck into a fixed value.

  ######################## NIC statistics for port 0
########################
  RX-packets: 259        RX-missed: 35728      RX-bytes:  2294220
  RX-errors: 0
  RX-nombuf:  0
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:            0
  Tx-pps:            0

############################################################################

  ######################## NIC statistics for port 0
########################
  RX-packets: 259        RX-missed: 71272      RX-bytes:  2294220
  RX-errors: 0
  RX-nombuf:  0
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:            0
  Tx-pps:            0

############################################################################

(2) started pktgen with "-j" option:
  (i) "MBits/s Rx" is not more than 384 when I send 9K packet, but this
value increases to 985~1007 if I send 1K packet.
  (ii) "Pkt Size" is showing 64
  (iii) I'm seeing only Packet of size 5K is getting received when I send
9K packet.[ Please check the attached receive.jpg]

From the above observation in the receiver side, there may be some issue in
receiving Jumbo frames.

I would also like to mention *Fragmentation* is not required in the
send/recv.

Regards,
N. Sarkar

On Mon, Dec 2, 2019 at 1:25 AM Nirmal Sarkar <nirmal.kisan@gmail.com> wrote:

> Hello Keith,
>
> Thanks a lot for your help.
> I'm using pktgen-3.7.1. So I'll pull your changes there and check it.
>
> Regards,
> N. Sarkar
>
> On Sat, Nov 30, 2019 at 5:31 AM Wiles, Keith <keith.wiles@intel.com>
> wrote:
>
>>
>>
>> > On Nov 19, 2019, at 11:42 AM, Roberts, Lee A. <lee.roberts@hpe.com>
>> wrote:
>> >
>> > Nirmal,
>> >
>> > Here are the changes that I've been using to allow jumbo frames with
>> dpdk-19.08 and
>> > pktgen-19.10.0:
>> >
>> > diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
>> jumbo/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h
>> > 462c462
>> > < #define     RTE_MBUF_DEFAULT_DATAROOM       2048
>> > ---
>> >> #define      RTE_MBUF_DEFAULT_DATAROOM       9600
>> > diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h
>> jumbo/dpdk-19.08/lib/librte_net/rte_ether.h
>> > 33c33
>> > < #define RTE_ETHER_MAX_LEN   1518  /**< Maximum frame len, including
>> CRC. */
>> > ---
>> >> #define RTE_ETHER_MAX_LEN   9600  /**< Maximum frame len, including
>> CRC. */
>> > diff -r default/pktgen-19.10.0/app/pktgen.c
>> jumbo/pktgen-19.10.0/app/pktgen.c
>> > 749c749
>> > <     else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN))
>> > ---
>> >>      else if ( (plen >= 1024) && (plen <= 1518))
>> > 753c753
>> > <     else if (plen > PG_ETHER_MAX_LEN)
>> > ---
>> >>      else if (plen > 1518)
>> > diff -r default/pktgen-19.10.0/lib/common/pg_inet.h
>> jumbo/pktgen-19.10.0/lib/common/pg_inet.h
>> > 379,380c379,380
>> > < #define ETH_MTU                     1500    /* Max MTU for Ethernet */
>> > < #define ETH_MAX_PKT                 1518    /* Max Ethernet frame
>> size */
>> > ---
>> >> #define ETH_MTU                     9600     /* Max MTU for Ethernet */
>> >> #define ETH_MAX_PKT                 9600     /* Max Ethernet frame
>> size */
>> >
>> >                                   - Lee Roberts
>>
>> I have a updated pktgen with jumbo support. You need to pass the -j
>> option to get jumbo frame support in pktgen. I have not done a lot of
>> testing on this version. If you have time please pull the pktgen repo and
>> switch over to the ‘dev’ branch and see if this work for you. I did not use
>> your changes here and did it my way :-)
>>
>> I did not change DPDK, as it seemed like it did not matter if
>> RTE_MBUF_DEFAULT_DATAROOM changed. I am sure someplace may care if they
>> used that define.
>>
>> >
>> >
>> > -----Original Message-----
>> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Nirmal Sarkar
>> > Sent: Monday, November 18, 2019 10:26 AM
>> > To: dev@dpdk.org
>> > Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
>> >
>> > Hello,
>> >
>> > I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame.
>> >
>> > I'm using ubuntu-18.04 system where pktgen is a kernel module and I
>> don't have any provision to set it for Jumbo frame.
>> > Can you please suggest how to configure Jumbo frame in pktgen ?
>> >
>> > In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [
>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built.
>> > During testing, I could not send packet size more than 1500 byte.
>> > What is the suggestion to overcome this problem ?
>> >
>> > Regards,
>> > N. Sarkar
>>
>> Regards,
>> Keith
>>
>>