Pulse Counters

• US 20170371806A1
• Filed: 06/22/2016
• Published: 12/28/2017
• Est. Priority Date: 06/22/2016
• Status: Active Grant

• Current Assignee: Arista Networks, Inc.
• Original Assignee: Arista Networks, Inc.
• Inventors: Ritchie, Duncan Stuart, Sapa, Sebastian, Neilson, Christopher Elisha
• Granted Patent: US 10,031,859 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 12/1009 using page tables, e.g. page table structures
• CPC Class Codes: G06F 12/1072 Decentralised address translation, e.g. in distributed shared memory systems
• CPC Class Codes: G06F 13/1663 Access to shared memory
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: G06F 2212/154 Networked environment
• CPC Class Codes: G06F 2212/657 Virtual address space management

Abstract

A method and apparatus of a device that reads and writes a plurality of counters is described. In an exemplary embodiment, a device receives plurality labels that correspond to the plurality of counters. The plurality of counters is stored in a shared memory table in the shared memory of the device. In addition, a writer writes counter data for each of the plurality of counters to the shared memory table. For each of the plurality of labels, the device performs a lookup of that label for a memory reference to a corresponding counter that is one of the plurality of counters and retrieves the memory reference for the corresponding counter. The device further reads the counter data for plurality of counters using the plurality of memory references. The device additionally sends the counter data to the client.

Claims

1. A non-transitory machine-readable medium having executable instructions to cause one or more processing units to perform a method to read a plurality of counters in a network element, the method comprising:

receiving a plurality of labels from a client, wherein each of the plurality of labels corresponds to one of the one of the plurality of counters, the plurality of counters is stored in a shared memory table in shared memory of the network element, and a writer writes counter data for each of the plurality of counters to the shared memory table;

for each of the plurality of labels,

performing a lookup of that label for a memory reference to a corresponding counter that is one of the plurality of counters, and

retrieving the memory reference for the corresponding counter;

reading the counter data for plurality of counters using the plurality of memory references; and

sending the counter data to the client.

2. The machine-readable medium of claim 1, further comprising:

storing the plurality of memory references to the plurality of counters.

3. The machine-readable medium of claim 1, wherein for each of the plurality of labels, the lookup of the plurality of labels is performed once and the reading of the counter data is preformed multiple times.

4. The machine-readable medium of claim 1, wherein the counter data for each of the plurality of counters is 64-bit integer.

5. The machine-readable medium of claim 1, wherein multiple writers write the counter data to the shared memory table.

6. The machine-readable medium of claim 1, wherein a counter is a piece of memory that is used to store data that is updated.

7. The machine-readable medium of claim 6, wherein each of the plurality of counters is selected from the group consisting of packets transmitted, packets received, bytes transmitted, bytes received, number of drop packets, software infrastructure, memory consumption, central process unit load, and number of collisions.

8. The machine-readable medium of claim 1, wherein the network element includes multiple interfaces and there are multiple ones of the plurality of counters for each of the multiple interfaces.

9. A non-transitory machine-readable medium having executable instructions to cause one or more processing units to perform a method to write to a plurality of counters in a network element, the method comprising:

generating counter data and a plurality of labels for a plurality of counters in a network element, wherein each of the plurality of labels corresponds to one of the one of the plurality of counters; and

for each of the plurality of labels,

allocating a memory reference for one of the plurality of counters that corresponds to that label,

storing this label and the memory reference in a lookup table, and

writing the counter data for the corresponding one of the plurality of counters using the memory reference in a shared memory table in shared memory of the network element, wherein multiple readers read the counter data by performing a lookup of this label for the memory reference using the lookup table.

10. The machine-readable medium of claim 9, wherein the counter data for each of the plurality of counters is 64-bit integer.

11. A method to read a plurality of counters in a network element, the method comprising:

receiving a plurality of labels from a client, wherein each of the plurality of labels corresponds to one of the one of the plurality of counters, the plurality of counters is stored in a shared memory table in shared memory of the network element, and a writer writes counter data for each of the plurality of counters to the shared memory table;

for each of the plurality of labels,

performing a lookup of that label for a memory reference to a corresponding counter that is one of the plurality of counters, and

retrieving the memory reference for the corresponding counter;

reading the counter data for plurality of counters using the plurality of memory references; and

sending the counter data to the client.

12. The method of claim 11, further comprising:

storing the plurality of memory references to the plurality of counters.

13. The method of claim 11, wherein for each of the plurality of labels, the lookup of the plurality of labels is performed once and the reading of the counter data is preformed multiple times.

14. The method of claim 11, wherein the counter data for each of the plurality of counters is 64-bit integer.

15. The method of claim 11, wherein multiple writers write the counter data to the shared memory table.

16. The method of claim 11, wherein a counter is a piece of memory that is used to store data that is updated.

17. The method of claim 16, wherein each of the plurality of counters is selected from the group consisting of packets transmitted, packets received, bytes transmitted, bytes received, number of drop packets, software infrastructure, memory consumption, central process unit load, and number of collisions.

18. The method of claim 11, wherein the network element includes multiple interfaces and there are multiple ones of the plurality of counters for each of the multiple interfaces.

19. A method to write to a plurality of counters in a network element, the method comprising:

generating counter data and a plurality of labels for a plurality of counters in a network element, wherein each of the plurality of labels corresponds to one of the one of the plurality of counters; and

for each of the plurality of labels,

allocating a memory reference for one of the plurality of counters that corresponds to that label,

storing this label and the memory reference in a lookup table, and

writing the counter data for the corresponding one of the plurality of counters using the memory reference in a shared memory table in shared memory of the network element, wherein multiple readers read the counter data by performing a lookup of this label for the memory reference using the lookup table.

20. The method of claim 19, wherein the counter data for each of the plurality of counters is 64-bit integer.