Elder abuse is recognized as an under-detected and under-reported social problem. Difficulties in detecting elder abuse are compounded by the lack of a standardized, psychometrically valid instrument for case finding. A total of 20 validity studies were included. The studies varied considerably regarding the prevalence of alcohol problems, the diagnostic criteria, and the examined patient categories. The MAST compared with other diagnostic criteria of alcohol problems gave validity measures with the following span The variables that seem to have the largest influence on the PVpos seem to be the prevalence of alcohol problems, the diagnostic method against which the MAST-questionnaire is validated , and the populations on which the MAST is applied.
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With drgn, it's possible to explore and analyze data structures with the full power of Python. This presentation will demonstrate the capabilities of drgn, discuss future plans, Running out of memory on a host is a particularly nasty scenario.
In the Linux kernel, if memory is being overcommitted, it results in the kernel out-of-memory OOM killer kicking in. Perhaps surprisingly, the kernel does not often handle this well. This results in a faster, more predictable, I would like to give a talk about KVA allocator in the kernel and about improvements i have done. This talk will discuss where we are and where we're going. Having maintained a distribution agnostic reference kernel Yocto , an operating system vendor kernel Wind River and finally a semi-conductor kernel Xilinx , there are a lot of obvious workflows and tools that are used to deliver kernels and support them after release.
The less than obvious workflows and tools are often related to distro kernel tree maintenance and balancing the needs of We'd like to spend a few minutes to provide some background around how we're using Yocto to produce kernel builds as well as bigger images that contain userspace as well, and then try to address some of the issues we're seeing with this process.
Tracing kernel boot is useful when we chase a bug in device and machine initialization, boot performance issue etc. Ftrace already supports to enable basic tracing features in kernel cmdline. However, since the cmdline is very limited and too simple, it is hard to enable complex features which are recently introduced, e. To solve As a result of this developers can use the same boot loaders to boot Linux on RISC-V as they do in other architectures, but there's more work to be done.
We will discuss the current state of the boot flow and pending issues. Every distro has to package the kernel tree using their own unique package files. Some parts of the process are built-in to the kernel source and are easy: build, install, and headers.
Some parts are not: configs, devel package, userspace tools package, tests, distro versioning, changelogs, custom patches, etc. Hardware PMU counters are limited resources. On the other hand, different perf events may measure the same metric, e. We call these perf events "compatible perf events". Technically, one hardware counter could serve Packet capture is useful from a general debugging standpoint, and is useful in particular in debugging BPF programs that do packet processing.
For general debugging, being able to initiate arbitrary packet capture from kprobes and tracepoints is highly valuable e. Arbitrary packet capture is distinct Last couple of years, we have witnessed an onslaught of vulnerabilities in the design and architecture of cpus. It is interesting and surprising to note that the vulnerabilities are mainly targeting the features designed to improve the performance of cpus - most notable being the hyperthreading smt.
While some of the vulnerabilities could be mitigated in software and cpu microcodes, couple of IOMMU is a very popluar equipment for both embed and server virtualization area.
In the topic we'll focus on embed area and shared virtual address. Execute only memory can protect from attacks that involve reading executable code.
This feature already exists on some CPUs and is enabled for userspace. This bit can be used to create execute-only memory for userspace programs as done Good reasons for that have been stated multiple times.
See e. The reality for distributions might look different though. Especially - but not Ftrace histograms, based on triggers and synthetic events were implemented few years ago by Tom Zanussi. They are very powerful instrument for analyzing the kernel internals, using ftrace events, but its user interface is very complex and hard to use.
This proposal is to discuss possible ways to define more easy to use and intuitive interface to this feature, using trace-cmd application. RISC-V trace spec draft have defined some trace format, we'll share our implementation of linux perf trace based on the spec. How to deal with SMP perf issues, how to verify our design in qemu, demonstrate a demo of perf trace with riscv-qemu. However, RISC V seems to be also a useful platform to do High Performance Computing and may be able to deliver custom solutions that can go well beyond what the traditional processor vendors can offer.
There are already efforts underway to use ARM for that purpose but those approaches are constrained by While kernelci. One typical example is distribution kernels, which often track a stable branch but also carry some extra patches and a specific configuration. Aside from covering a particular downstream branch, having a separate KernelCI instance also makes it The Red-Black tree and Radix tree are used in many places in the kernel to store ranges.
Both of these trees have drawbacks when used for ranges. It is also designed with the assumption that memory accesses are cheap, which is no longer true. The Radix tree performs acceptably well when ranges are aligned to a power of 2, A Linux kernel fork implementing the protocol has been developed and maintained since March While there are some large MPTCP deployments using this custom kernel, an upstream implementation will make the protocol available on Linux devices of all Understanding Application performance and utilization characteristics is critically important for cloud-based computing infrastructure.
Minor improvements in predictability and performance of tasks can result in large savings. Google runs all workloads inside containers and as such, cgroup performance monitoring is heavily utilized for profiling.
We rely on two approaches built on Linux As the project evolved, many trace manipulation use-cases merging, trimming, filtering, conversion, analysis, etc.
In this session, we share our experience porting these hypervisors and also discuss future work on RISC-V hypervisors. This presentation will discuss how the RISC-V Hypervisor extension works and how it is different to other common architectures Hypervisor I would like to discuss how to implement a series of libraries for all the tracing tools that are out there, and have a repository that at least points to them.
From libftrace, libperf, libdtrace to liblttng and libbabletrace. Provide better kernel packages to the distribution users, is a really hot topic in distributions, as the kernel package is the fundamental part of the distribution. One of the way to provide a better quality kernel is to implement a quality control by using automated tests. Each distributions are probably using different tools and tests suits. Let's share our knowledge and which tools are We'll talk about important updates from the past year, including improved tracing providers and new language features, and we'll also discuss future plans for the project.
The printk function has a long history of issues and has undergone many iterations to improve performance and reliability. Yet it is still not an acceptable solution to reliably allow the kernel to send detailed information to the user. And these problems are even magnified when using a real-time system.
So why is printk so complicated and why are we having such a hard time finding a good A mechanism which is of interest to us because it allows 1 services to share a port number when their IP address ranges don't overlap, and 2 reverse proxies to listen on all available port numbers.
Implementing safety-critical systems usually requires adhering to meticulously defined development processes that specify how code is supposed to be developed, integrated and reviewed, driven by the assumption that a disciplined approach leads to reliably high quality. While known to produce code that can satisfy the highest quality standards, Linux kernel development does not follow such Syzkaller is run on Upstream and Stable trees.
These results are readily available on the syzbot dashboard. What do distros gain by running Syzkaller? Distros regularly add features to their kernels, fix bugs and add third party drivers. Syzkaller testing focused What's it going to take to allow us to make the benefits of the RISC-V architecture available in centralized computing systems?
Are there some things we need to be working on right now to pave the way for future success here? How can the state of the ARM architecture help us understand this problem?
This presentation will explore the technical decisions made in designing a data-center scale Many new BPF tracing tools are about to be published, deepening our view of kernel internals on production systems.
This session will summarize what has been done and what will be next with BPF tracing, discussing the challenges with taking kernel and application analysis further, and the potential kernel changes needed. A side effect of this work is also the ability to execute the kernel directly in M-Mode and how this is implemented while keeping most of the architecture code unmodified. The presentation will include examples of testing environment builds, discuss the There have been two different approaches proposposed on the LKML over the past year on core scheduling.
Upstream chose a different route and decided to modify CFS, and only do "core-scheduling". Vineeth picked up the This goal of that project was to develop a modular smartphone. Greybus gives the ability to the host to control remotely the buses such as i2c or spi of the modules.
Although Project ARA has been aborted, Greybus has been merged to Linux kernel, and it is still maintained by the community. For many years developers have leveraged gdb or crash to look at kernel crash dumps on linux.
Although those tools have served us well, it can sometimes be difficult to navigate the crash dump to find the information you really need. In this talk, we would like to present some new tools that make it easier to debug kernel crash dumps and enhance kernel developer's ability to root causes DRM is merging new drivers at a brisk pace, and with lima and panfrost to support ARM Mali GPUs the last obvious gap in not yet reverse-engineered hardware is getting closed.
2017, Number 3
He is an expert in Management and Human Resources and one of the leading European specialists in research and divulgation of mobbing or psychological harassment in the workplace and education. He was director of human resources in various companies in the technology sector. Sal Terrae, Most cases that victims narrate show a perverse and systematic use in our organizations of the scapegoat mechanism by which it is always convenient sacrifice someone, often the most vulnerable, to the harassment of the majority in favor of maintaining the status quo and domination over others.
INNS-CIIS aims to provide a platform for researchers to exchange the latest ideas and present the most current research advances in general areas related to computational intelligence and its applications in various domains. The 34 revised full papers presented in this book have been carefully reviewed and selected from 72 submissions. They cover a wide range of topics and application areas in computational intelligence and informatics. Skip to main content Skip to table of contents. Advertisement Hide.