CN112764934B - Calculation method for CPU utilization rate of load balancing equipment - Google Patents
Calculation method for CPU utilization rate of load balancing equipment Download PDFInfo
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- CN112764934B CN112764934B CN202110122671.5A CN202110122671A CN112764934B CN 112764934 B CN112764934 B CN 112764934B CN 202110122671 A CN202110122671 A CN 202110122671A CN 112764934 B CN112764934 B CN 112764934B
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- 238000004364 calculation method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 3
- 241001522296 Erithacus rubecula Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
- G06F9/505—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals considering the load
Abstract
The invention discloses a calculation method of CPU utilization rate of load balancing equipment, which calculates a time value of single cycle according to a formula of time pass = time end-time start; obtaining continuously-changed time all and time work values according to the calculation; at the end of each cycle, time pass is accumulated: time all = time all + time pass; at the end of each cycle, if packet exists is true, then calculate: time work = time work + time pass; calculating the CPU utilization rate according to the data; the CPU calculation method provided by the invention can accurately quantify and reflect the CPU busy/idle degree in a period of time for a load balancing system for polling and receiving packets.
Description
Technical Field
The invention relates to the technical field of CPU utilization rate, in particular to a method for calculating the CPU utilization rate of load balancing equipment.
Background
Load balancing is a critical component of a high availability network infrastructure, typically used to distribute workload to multiple servers to improve the performance and reliability of websites, applications, databases, or other services.
In a web page (web) architecture without load balancing, users are directly connected to a web server, and if the server is down, the users have no way to access naturally. In addition, if many users attempt to access the server at the same time, the limit that they can handle is exceeded, there may be situations where the loading speed is slow or no connection at all.
This failure can be alleviated by introducing a load balancer and additional web servers. Typically, all backend servers will be guaranteed to provide the same content so that the user can receive consistent content regardless of which server responds. Additional multiple web servers may also share the load, relieving individual web servers of stress, and thus handling more user requests.
The load balancing device may be software or a dedicated hardware device.
To achieve the highest performance, the load balancing program may monopolize the entire Central Processing Unit (CPU) core and employ a round robin packet reception scheme. I.e. to continuously try to collect data packets from the network card in a dead loop, and to process the packets immediately once they are.
For maximum efficiency, the load balancing process is typically exclusive of the CPU. And the method of the endless loop polling for receiving the packets is that the program is continuously polled even if no data packet exists on the network card. Thus, the CPU occupancy rate of this process is always kept at 100% in view of the operating system (e.g., linux, a widely used operating system).
Therefore, a method for calculating the CPU utilization rate of the load balancing device is a urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a novel CPU statistical method aiming at a polling and packet-collecting mode, wherein the CPU utilization rate displayed under an operating system of a load balancing system can not reflect the real situation.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a calculation method of CPU utilization rate of load balancing equipment comprises the following steps:
step 1: recording a current time value time start at the beginning of each cycle, and recording a current time value end at the end of each cycle; the time of the single cycle is time pass, and the time value of the single cycle can be calculated according to the formula of time pass = time end-time start;
step 2: setting a data packet detection point as a packet exists, and if the current cycle detects that the network card has a received packet, setting the packet exists as true, otherwise setting the packet exists as false;
step 3: setting an accumulated total time variable time all, and accumulating a total time variable work when the network card receives the packet;
step 4: obtaining continuously-changed time all and time work values according to the calculation;
at the end of each cycle, time pass is accumulated: time all = time all + time pass;
at the end of each cycle, if packet exists is true, then calculate: time work = time work + time pass; if the packet exists is false, not performing calculation;
step 5: calculating the CPU utilization rate:
counting CPU utilization rate from time t0 to time t1 (t 0< t 1):
the values of time all and time work are read at time t0 and are noted as: time all_0 and time work_0;
the values of time all and time work are read at time t1 and are noted as: time all_1 and time work_1;
the CPU usage in the time period t0 to t1 is:
i.e. the ratio of the time for processing the data packet to the total time during this period.
As an improvement, in the step 4, if the network card has not received the packet, the time work is always 0; if the network card has a packet receiving function every time, the time all is equal to the time work.
Compared with the prior art, the invention has the advantages that: the CPU calculation method provided by the invention can accurately quantify and reflect the CPU busy/idle degree in a period of time for a load balancing system for polling and receiving packets.
Drawings
Fig. 1 is a flowchart of a method for calculating CPU utilization of a load balancing device according to the present invention.
Detailed Description
The method for calculating the CPU utilization rate of the load balancing device is further described in detail below with reference to the accompanying drawings.
The invention discloses a method for calculating the CPU utilization rate of load balancing equipment, which comprises the following specific implementation processes:
recording a current time value time start at the beginning of each cycle, and recording a current time value end at the end of each cycle; the time of the single cycle is time pass, and the time value of the single cycle can be calculated according to the formula of time pass = time end-time start; setting a data packet detection point as a packet exists, and if the current cycle detects that the network card has a received packet, setting the packet exists as true, otherwise setting the packet exists as false; setting a cumulative total time variable time all, and accumulating a total time variable work when the network card receives the packet.
Obtaining continuously-changed time all and time work values according to the calculation; at the end of each cycle, time pass is accumulated: time all = time all + time pass; at the end of each cycle, if packet exists is true, then calculate: time work = time work + time pass; if the packet exists is false, not performing calculation; if the network card has not received the packet, the time work is always 0; if the network card has a packet receiving function every time, the time all is equal to the time work.
The calculation method of the CPU utilization rate is as follows:
counting CPU utilization rate from time t0 to time t1 (t 0< t 1):
the values of time all and time work are read at time t0 and are noted as: time all_0 and time work_0;
the values of time all and time work are read at time t1 and are noted as: time all_1 and time work_1;
the CPU usage in the time period t0 to t1 is:
i.e. the ratio of the time for processing the data packet to the total time during this period.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (2)
1. The method for calculating the CPU utilization rate of the load balancing equipment is characterized by comprising the following steps of:
step 1: recording a current time value time start at the beginning of each cycle, and recording a current time value end at the end of each cycle; the time of the single cycle is time pass, and the time value of the single cycle can be calculated according to the formula of time pass = time end-time start;
step 2: setting a data packet detection point as a packet exists, and if the current cycle detects that the network card has a received packet, setting the packet exists as true, otherwise setting the packet exists as false;
step 3: setting an accumulated total time variable time all, wherein the initial value of the accumulated total time variable time all is time all=0; the total time variable time work when the accumulated network card receives the packet is the initial value of time work=0;
step 4: obtaining continuously-changed time all and time work values according to the calculation;
at the end of each cycle, time pass is accumulated: time all = time all + time pass;
at the end of each cycle, if packet exists is true, then calculate: time work = time work + time pass; if the packet exists is false, not performing calculation;
step 5: calculating the CPU utilization rate:
counting CPU utilization rate from time t0 to time t1 (t 0< t 1):
the values of time all and time work are read at time t0 and are noted as: time all_0 and time work_0;
the values of time all and time work are read at time t1 and are noted as: time all_1 and time work_1;
the CPU usage in the time period t0 to t1 is:
i.e. the ratio of the time for processing the data packet to the total time during this period.
2. The method for calculating the CPU utilization of the load balancing device according to claim 1, wherein: in the step 4, if the network card has not received the packet, the time work is always 0; if the network card has a packet receiving function every time, the time all is equal to the time work.
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| CN202110122671.5A CN112764934B (en) | 2021-01-29 | 2021-01-29 | Calculation method for CPU utilization rate of load balancing equipment |
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| CN112764934B true CN112764934B (en) | 2024-01-30 |
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