The proposed solution1 builds a framework to add static probes. This solution was designed and implemented by me as part of VProbes[7] project during summer internship 2014 at VMware, inc. The solution in this paper covers a high level overview of the framework. It builds on top of the existing VProbes[7] design1. User space applications or the existing kernel source can add static probes using this framework. The paper describes adding static probes in a user space application to keep the explanation simple. Figure 1 shows a simple user code. The application contains two probe points defined viz. FuncEntry and FuncExit. These are static probes which are added by the developer. The probe points are expanded in a macro which is defined in the header file probes.h. Each of these probe points are declared as a volatile integer variable. However, these integer variables are declared in a separate section in the ELF file as shown in Figure 2. Thus all the defined probe points are part of new section called probes_uwsection. The probe points are padded with a name called “PROBE_” and “_PROBE” to avoid name mangling issue in C++. Hence, after pre-processing stage, every probe name is padded. The application is compiled and loaded. During application load in the kernel, the binary is intercepted at the ELF loader. In the ELF loader, the binary is checked for the presence of the new section probes_uwsection. If the new section exists, all the probe points declared in the new
When a conditional branch is fetched from memory, the branch target address is used to index the selector table, this table then determines whether global or local predictor is used. The 2-bit counter in the selector table is updated if the chosen predictor is not taken and other predictor is taken.
The uops that are to be computed are dispatched to ports 0, 1, 5 and 6 and are executed in the respective execution units. The execution units in Haswell are arranged in three stacks: SIMD integer, integer and FP which operate independent from each other. Each stack has different data types, potentially different registers and result forwarding networks. The data path can connect with a given stack for accessing the registers and forwarding network. Forwarding between networks may need an extra cycle to move different stacks. The load and store units access the port numbers 2-4 and 7 accesses the integer by pass network thus reducing the access to the GPR and latency for forwarding.
initialing pointing towards NULL, and uses two temporary pointer nodes *n and *temp1 for performing various functions. The functions performed are adding node
b) The address and control buses are activated with a memory address position and read command.
The objective of this lab is to be able to understand how the CPU functions work, as well as understanding machine and assembly language.
The lw instruction is Load Word which loads whatever is stored in the memory at address location 300+content of $t2 and stores it in register $s3.
1. Consider a processor that supports virtual memory. It has a virtually indexed physically tagged cache, TLB, and page table in memory. Explain what happens in such a processor from the time the CPU generates a virtual address to the point where the referenced memory contents are available to the processor.
as scan for ports/services. OpenVAS is used to scan for vulnerabilities. It also can perform an
Ground investigations are a crucial part of the survey as they determine the nature of the land and explains the different types of soil which helps identify the type of foundations that should be used or how water absorbent the soil is. A few stages of a ground investigation include; Trial Pitting, Dynamic Probe testing/Sampling, Cable Percussive Boreholes and Rotary Boreholes.
Suppose the location myNumber is a variable. A variable is a named memory location whose value can vary—for example, the value of myNumber might be 3 when the program is used for the first time and 45 when it is used the next time.
The goal of this lab was to familiarize myself with the RLES vCloud Director, the vApps, and building virtual machines using RLES. I learned how to work with Red Hat Enterprise Linux 7 to build and customize servers built to meet the needs of my virtual environment. I also experimented with configuring pfSense to be my gateway between the virtual network and RITs RLES infrastructure. There was also the introduction of setting up both a wiki and a monitoring solution, which I chose to use MediaWiki and Nagios Monitoring Solution for my services.
* Check existing security scan reports, from WireShark and NetWitness Investigator, and see if we can identify data leakage, and setup new policies and procedures for monitoring web servers and applications.
This interrupt takes the form of a memory address of code needed to handle the interrupt (in this case print a file). Alternatively a simple pulse can be sent over the signal line. This results in additional processing for the CPU prior to step 4 to pole the devices and find the one responsible. In this case the device id becomes a pointer to an array containing the address of the event handler for that device (Zaks,1980, p. 506).
3. Presents the software description. It explains the implementation of the project using PIC C Compiler software.
is detected then those values will be sieved out. If divergence occurs among more number of processes then the operation itself will be examined further.