Mailing List Archive: More questions

First off, Alfredo thanks for answering all my questions as I get up to
speed on PF_RING.

I have a few other questions based off of some /proc/net/pf_ring/ output.

1. In the first cat I have 0 free slots and the second 13k, am I dropping
traffic when there aren't free slots? Should I increase the slots even more?

2. Why do I have lost packets? I have some rings with 0% and others with
about 5% packet drops. Is this normal?

3. My capture mode is set for RX only in the info file, but the ring file
says both?

4. Is socket mode something I should worry about?

Thanks,

PF_RING Version : 7.0.0
(7.0.0-stable:aef22ec763b2541f8c0632ed86b242cf7cff88aa)
Total rings : 18

Standard (non ZC) Options
Ring slots : 65534
Slot version : 16
Capture TX : No [RX only]
IP Defragment : No
Socket Mode : Standard
Cluster Fragment Queue : 0
Cluster Fragment Discard : 0

cat 14952-p1p1.36

Bound Device(s) : p1p1
Active : 1
Breed : Standard
Appl. Name : bro-p1p1
Socket Mode : RX+TX
Capture Direction : RX+TX
Sampling Rate : 1
IP Defragment : No
BPF Filtering : Disabled
Sw Filt Hash Rules : 0
Sw Filt WC Rules : 0
Sw Filt Hash Match : 0
Sw Filt Hash Miss : 0
Hw Filt Rules : 0
Poll Pkt Watermark : 1
Num Poll Calls : 150166290
Channel Id Mask : 0xFFFFFFFFFFFFFFFF
VLAN Id : 65535
Cluster Id : 1
Slot Version : 16 [7.0.0]
Min Num Slots : 65534
Bucket Len : 8192
Slot Len : 8248 [bucket+header]
Tot Memory : 540536832
Tot Packets : 1136861832
Tot Pkt Lost : 69635693
Tot Insert : 1067226139
Tot Read : 1067142762
Insert Offset : 435486256
Remove Offset : 315309304
Num Free Slots : 0
TX: Send Ok : 0
TX: Send Errors : 0
Reflect: Fwd Ok : 0
Reflect: Fwd Errors: 0

Bound Device(s) : p1p1
Active : 1
Breed : Standard
Appl. Name : bro-p1p1
Socket Mode : RX+TX
Capture Direction : RX+TX
Sampling Rate : 1
IP Defragment : No
BPF Filtering : Disabled
Sw Filt Hash Rules : 0
Sw Filt WC Rules : 0
Sw Filt Hash Match : 0
Sw Filt Hash Miss : 0
Hw Filt Rules : 0
Poll Pkt Watermark : 1
Num Poll Calls : 150166290
Channel Id Mask : 0xFFFFFFFFFFFFFFFF
VLAN Id : 65535
Cluster Id : 1
Slot Version : 16 [7.0.0]
Min Num Slots : 65534
Bucket Len : 8192
Slot Len : 8248 [bucket+header]
Tot Memory : 540536832
Tot Packets : 1136867856
Tot Pkt Lost : 69635693
Tot Insert : 1067232163
Tot Read : 1067179680
Insert Offset : 444167560
Remove Offset : 368221880
Num Free Slots : 13051
TX: Send Ok : 0
TX: Send Errors : 0
Reflect: Fwd Ok : 0
Reflect: Fwd Errors: 0

> On 8 May 2018, at 18:13, Carl Rotenan <carlrotenan@gmail.com> wrote:
>
> First off, Alfredo thanks for answering all my questions as I get up to speed on PF_RING.
>
> I have a few other questions based off of some /proc/net/pf_ring/ output.
>
> 1. In the first cat I have 0 free slots and the second 13k, am I dropping traffic when there aren't free slots?

This happens when the application is too slow processing traffic

> Should I increase the slots even more?

Yes, that would help with traffic bursts, however it doesn’t help much if the application cannot keep up with sustained traffic

> 2. Why do I have lost packets? I have some rings with 0% and others with about 5% packet drops. Is this normal?

This depends on traffic distribution or other factors such as core affinity of the application threads

> 3. My capture mode is set for RX only in the info file, but the ring file says both?

With "info file” do you mean the bro configuration? It seems that bro is not setting the capture direction.

> 4. Is socket mode something I should worry about?

You can ignore it, it’s just the ‘ability’ to receive and send (even if you are not actually sending)

Alfredo

>
> Thanks,
>
>
> PF_RING Version : 7.0.0 (7.0.0-stable:aef22ec763b2541f8c0632ed86b242cf7cff88aa)
> Total rings : 18
>
> Standard (non ZC) Options
> Ring slots : 65534
> Slot version : 16
> Capture TX : No [RX only]
> IP Defragment : No
> Socket Mode : Standard
> Cluster Fragment Queue : 0
> Cluster Fragment Discard : 0
>
> cat 14952-p1p1.36
>
> Bound Device(s) : p1p1
> Active : 1
> Breed : Standard
> Appl. Name : bro-p1p1
> Socket Mode : RX+TX
> Capture Direction : RX+TX
> Sampling Rate : 1
> IP Defragment : No
> BPF Filtering : Disabled
> Sw Filt Hash Rules : 0
> Sw Filt WC Rules : 0
> Sw Filt Hash Match : 0
> Sw Filt Hash Miss : 0
> Hw Filt Rules : 0
> Poll Pkt Watermark : 1
> Num Poll Calls : 150166290
> Channel Id Mask : 0xFFFFFFFFFFFFFFFF
> VLAN Id : 65535
> Cluster Id : 1
> Slot Version : 16 [7.0.0]
> Min Num Slots : 65534
> Bucket Len : 8192
> Slot Len : 8248 [bucket+header]
> Tot Memory : 540536832
> Tot Packets : 1136861832
> Tot Pkt Lost : 69635693
> Tot Insert : 1067226139
> Tot Read : 1067142762
> Insert Offset : 435486256
> Remove Offset : 315309304
> Num Free Slots : 0
> TX: Send Ok : 0
> TX: Send Errors : 0
> Reflect: Fwd Ok : 0
> Reflect: Fwd Errors: 0
>
> Bound Device(s) : p1p1
> Active : 1
> Breed : Standard
> Appl. Name : bro-p1p1
> Socket Mode : RX+TX
> Capture Direction : RX+TX
> Sampling Rate : 1
> IP Defragment : No
> BPF Filtering : Disabled
> Sw Filt Hash Rules : 0
> Sw Filt WC Rules : 0
> Sw Filt Hash Match : 0
> Sw Filt Hash Miss : 0
> Hw Filt Rules : 0
> Poll Pkt Watermark : 1
> Num Poll Calls : 150166290
> Channel Id Mask : 0xFFFFFFFFFFFFFFFF
> VLAN Id : 65535
> Cluster Id : 1
> Slot Version : 16 [7.0.0]
> Min Num Slots : 65534
> Bucket Len : 8192
> Slot Len : 8248 [bucket+header]
> Tot Memory : 540536832
> Tot Packets : 1136867856
> Tot Pkt Lost : 69635693
> Tot Insert : 1067232163
> Tot Read : 1067179680
> Insert Offset : 444167560
> Remove Offset : 368221880
> Num Free Slots : 13051
> TX: Send Ok : 0
> TX: Send Errors : 0
> Reflect: Fwd Ok : 0
> Reflect: Fwd Errors: 0
>
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> Ntop-misc mailing list
> Ntop-misc@listgateway.unipi.it
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