LatencyMon 是一款專業的音頻檢測軟體,可檢測出電腦上各個驅動的狀態,特別是聲卡驅動的延遲情況,LatencyMon 檢測出電腦音頻延遲、點擊和持久性噪點的原因,了解聲卡驅動是否適配電腦。LatencyMon 還提供了ISR監視器、DPC監視器和pagefault顯示器的功能,播放音樂和玩遊戲的時候,如聲音播放出現問題的話,LatencyMon可檢測問題原因出自何處,雖不能提供解決方案,卻可以掃描出所有的音頻問題。
The audio latency problem
Windows is not a real-time operating system. All requests to the operating system are delivered on a best effort basis. There are no guarantees whatsoever that requests are delivered within a certain time frame, which are the characteristics of a real-time operating system. That is not a problem for most devices and tasks but this is bad news for audio applications (which are considered soft real-time) because they need to deliver data to the subsystem and the hardware in buffers several times per second. If one or more buffers miss their deadlines and are not delivered in time it has audible consequences which are recognized as dropouts, clicks and pops.
About DPCs and ISRs
The Windows thread dispatcher (also known as scheduler) which is part of the kernel executes threads based on a priority scheme. Threads with higher priority will be given a longer execution time (also known as quantum or time slice) than threads with a lower priority. However the kernel also knows other types of units of execution known as interrupt service routines (ISRs). Devices connected to the system may interrupt on a connected CPU and cause their interrupt service routines to execute. An interrupt can occur on the same processor that an audio program is running on. Any thread that was running on the processor on which an interrupt occurred will be temporarily halted regardless of its priority. The interrupt service routine (ISR) is executed and may schedule a DPC (Deferred Procedure Call) to offload an amount of work. The DPC will most likely run immediately on the same processor which means the audio application will halt until both the ISR and the DPC routines have finished execution. That is because ISRs and DPCs run at elevated IRQL which means they cannot become preempted by the thread dispatcher (scheduler). Therefore to guarantee responsiveness of the system, ISR and DPC routines should execute as fast as possible. Guidelines say that they should not spend more than 100 µs of execution time however this is often not reached due to hardware factors beyond the control of the driver developer. If execution time gets too high, the audio program may be unable to deliver audio buffers to the hardware in a timely manner.
About hard pagefaults
Windows uses a concept of virtual memory which relies on the page translation system provided by the CPU. Whenever a memory address is requested which is not available in physical memory (not resident), an INT 14 will occur. The OS provided INT 14 handler will decide how to proceed next. If the page in which the address...
M3 Bitlocker Loader Mac 版是一款Mac平臺的加密磁碟讀取工具,是一款能夠對使用了 Bitlocker 方式加密的磁片進行讀取管理權限的工具,對於這類 USB 設備或者是磁片,它能流覽、加密、解密等,操作簡單。使用原始密碼或 BitLocker恢復金鑰與M3載入器打開BitLocker加密BitLocker驅動器後,您可以複製任何檔從你的MAC電腦BitLocker加密卷。
(Magnet Axiom Complete原名INTERNET EVIDENCE FINDER)
Magnet Axiom Complete 是款用來獲取、恢復和分析網際網路通信痕跡的利器。因其易用性、簡明行和全面性而聞名。其能夠幫助政府執法部門、軍事/情報機構人員、海關/邊境檢查人員、企業安全人員對Windows和Mac電腦以及Android和iOS移動設備進行電子取證調查。詳細介紹請見後面欄位!
IEF 對於企業的益處
The ability to recover digital evidence is becoming business-critical. Magnet Axiom Complete is the secret weapon every organization should have in its forensic toolkit.
IEF can search a hard drive, live RAM, or files for Internet-related data. The software is designed with digital forensics examiners/investigators in mind. IEF is also used by IT security professionals, litigation support personnel, incident response teams, cyber security specialists and corporate investigators.
IEF can recover data from social networking communications, instant messenger chat histories, popular webmail applications, web browsing history, and peer-to-peer sites and other online communications.
IEF 對於司法鑑定人員的益處
INTERNET EVIDENCE FINDER™ (IEF) searches in more places, recovering more data. Its easy to use, and the reporting is flexible.
IEF is forensic software that recovers Internet-related data from a hard drive, live RAM, or files. Because of the advantages it offers over other solutions on the market, IEF is the only choice for many of the world’s top law enforcement agencies.
IEF was designed with digital forensics examiners/investigators in mind, and recovers more digital evidence than any other solution on the market.
IEF 對軍方與政府的益處
In military and government investigations, digital evidence can be a question of national security, and even life or death.
INTERNET EVIDENCE FINDER™ (IEF) is forensic software that searches a hard drive, live RAM, or files for Internet-related data. IEF was designed with digital forensics examiners / investigators in mind. IEF is also used by IT security professionals, litigation support personnel, incident response teams, cyber security specialists and corporate investigators.
IEF recovers content from social networking pages, instant messenger chat histories, popular webmail applications, web browsing history, and peer-to-peer sites and other online communications.
Malwarebytes Breach Remediation 反惡意程式軟體,提供公司企業偵測威脅、快速刪除感染的檔案、掃描和修復的工具,主要利用命令列下執行,其語法和選項簡單上手,是一應用於商業用途的防毒軟體。
Hunts for malware
Discovers new and undetected malware and rapidly remediates it. Uses Malwarebytes behavioral rules and heuristics to detect zero-day malware. Accesses indicators of compromise (IOCs) from third-party breach detection tools and repositories for comprehensive detection.
Remediates malware thoroughly
Removes all traces of infections and related artifacts, not just the primary payload or infector. Eliminates risk of new attacks or lateral movements that capitalize on leftover malware traces. Malwarebytes is the de facto industry leader in malware remediation—trusted by millions and proven by AV-Test.org.
Reduces downtime drastically
Enables you to direct efforts toward more important projects, versus spending countless hours resolving malware-related incidents and re-imaging hardware across your enterprise.
Reduces threat dwell time
Detects advanced threats that your other security layers have missed, closing the window between discovery and remediation. Reduces exposure to malicious activity.
Records threat events for later analysis
Tracks forensic analytics using the proprietary Forensic Timeliner feature so your team can address security gaps or unsafe user behavior. Gathers system events prior to and during an infection and presents data in a timeline for comprehensive analysis of vector and attack chain. Events covered include file and registry modifications, file execution, and websites visited.
Works within your stack
Integrates easily with existing security infrastructure such as SIEM (e.g., Splunk, ArcSight, IBM QRadar), breach detection systems (e.g., Cisco, Palo Alto Networks, FireEye), and endpoint management platforms (e.g., Tanium, ForeScout, Microsoft SCCM). Enables you to trigger deployment and remediation through your endpoint management platform based on alerts received from your SIEM and automatically feed resolution details back into your SIEM.
Closes Apple security gap
Removes malware and adware quickly from Mac endpoints. Cleans up OS X systems in less than a minute from start to finish. Separate GUI and command line programs enable flexible deployment using popular Mac management solutions (e.g., Apple Remote Desktop, Casper Suite, Munki). Allows remote, automated operation using shell, or AppleScript commands. System administrators and incident responders can collect system information using convenient Snapshot command.