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Experimenting with a multi-level cache for high-frequency effects based on my previous work for SPWI surface GI (left). Specular effects like caustics scale in 2D on surfaces. Also researching solutions to angular aliasing and flickering of depth-upscaled probes (right). No TAA.

40,090 Aufrufe • vor 6 Tagen •via X (Twitter)

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Physiology of PEEP Alveolar Recruitment and Stabilization Recruitment: PEEP opens collapsed alveoli, increasing the surface area for gas exchange. Stabilization: By maintaining alveoli open, PEEP prevents the cyclic opening and closing of alveoli, reducing shear stress and the risk of ventilator-induced lung injury (VILI). Improvement in Oxygenation V/Q Matching: PEEP improves ventilation-perfusion matching by redirecting blood flow to well-ventilated alveoli, reducing intrapulmonary shunting. Redistribution of Edema: In conditions like ARDS, PEEP can redistribute alveolar edema, improving compliance and gas exchange. Effects on Compliance Static Compliance: PEEP can increase static compliance by recruiting alveoli, but excessive PEEP may overdistended alveoli, decreasing compliance. Dynamic Compliance: PEEP may also affect dynamic compliance by altering airway resistance. Hemodynamic Implications Venous Return: Increased intrathoracic pressure reduces venous return, potentially decreasing cardiac output. Afterload: PEEP may increase left ventricular afterload by increasing transpulmonary pressure. Right Ventricular Function: High PEEP may cause right ventricular dilation and dysfunction, especially in the presence of pulmonary hypertension. Effects on Intracranial Pressure (ICP) PEEP may increase ICP by reducing venous outflow from the brain, a critical consideration in neurocritical care. Clinical Application and Monitoring ARDS: PEEP/FiO2 Tables: Utilizing evidence-based tables to titrate PEEP based on FiO2 requirements. Recruitment Maneuvers: Often used in conjunction with PEEP to assess recruitability. Monitoring with Esophageal Manometry: To assess transpulmonary pressure and individualize PEEP settings. Obstructive Lung Disease: Careful application of PEEP to prevent air trapping and intrinsic PEEP (auto-PEEP). Heart Failure and Fluid Status: Echocardiographic Monitoring: To assess the impact of PEEP on cardiac function and filling pressures. Pulmonary Artery Catheterization: May be used to monitor the effects of PEEP on pulmonary artery pressures and cardiac output. Protective Lung Ventilation in Surgery: Utilizing PEEP to prevent atelectasis and postoperative pulmonary complications. Weaning Process Gradual Reduction: Monitoring respiratory mechanics, work of breathing, and gas exchange. Spontaneous Breathing Trials (SBT): Assessing the ability to tolerate lower PEEP levels. Conclusion PEEP is a complex and vital component of mechanical ventilation, with multifaceted effects on respiratory mechanics, gas exchange, hemodynamics, and even neurodynamics. Its application requires a nuanced understanding of underlying pathophysiology, continuous monitoring with advanced tools, and individualized titration to optimize patient outcomes. The integration of PEEP into a comprehensive respiratory care strategy exemplifies the complexity and precision required in critical care medicine.

𝗥𝗲𝘀𝘂𝘀𝗠𝗲𝗱

84,714 Aufrufe • vor 3 Jahren

Hi my friends 🌞 let’s make this Sunday more interesting with latex style🔥 Freya Allan, Lexi Marvel, My Model, Sabrina Carpenter 🔥 👉🏻Subscribe for more content ⚡️ Nano Banana 2 & MiniMax H3 via Hailuo AI Prompt: { "member": "Freya Allan", "subject": { "identity": "facial structure, complexion and proportions of Freya Allan", "hair": "long dark wavy hair over the shoulders", "expression": "head tilted down toward right shoulder, eyes looking up at the lens", "pose": "leaning forward, torso tilted right, right hand on upper right thigh, left arm on metal railing behind her, left knee raised on a step, right leg cropped at the bottom edge" }, "wardrobe": { "silhouette": "short form-fitting high-neck halter dress, gathered at bust, open sides, ruched seams, mid-thigh hem", "material": "glossy latex", "color": "neon pink", "footwear": "only the top edge of a neon pink heel visible on the left foot, rest cropped", "accessories": "opaque black tights, thin hoop earrings partly hidden by hair" }, "scene": { "location": "dilapidated industrial stairwell", "atmosphere": "hazy dusty air catching the light", "background": "peeling paint and rusted wall on the left with small graffiti 'Keor' near a red dragon drawing, metal staircase with diamond-plate treads and weathered railing on the right", "composition": "tall vertical frame, slightly low angle looking up, subject centered and filling the height", "lighting": "dramatic high-contrast warm light from upper left, angular rays on the wall and face, lower right staircase in deep shadow", "camera": "50mm, f/2.8", "grade": "high-contrast, warm highlights, rich shadows" }, "compiled_prompt": "Portrait of Freya Allan, one continuous full-frame exposure. Long dark wavy hair over her shoulders. Head tilted down toward her right shoulder, eyes looking up at the lens. Leaning forward, torso tilted right, right hand on her thigh, left arm on a metal railing. Left knee raised on a step, right leg cropped at the bottom. Short form-fitting glossy neon-pink latex high-neck halter dress with open sides and ruched seams, mid-thigh hem. Opaque black tights, thin hoop earrings. Only the top of a neon-pink heel visible. Dilapidated industrial stairwell, hazy dusty air. Textured peeling wall with small 'Keor' graffiti near a red dragon drawing on the left, metal staircase on the right. Tall vertical low-angle composition. Warm directional light from upper left with specular highlights on the latex, deep shadows on the stairs. 50mm f/2.8, dramatic high-contrast grade." } ```

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Day 11/90 of Inference Engineering How does vLLM work and how is it used in production? Before we discuss how vLLM works internally, it helps to understand what vLLM is. At a high level, vLLM is an inference engine that is designed to serve LLMs to thousands of concurrent users efficiently while managing scarce compute and memory. The goal for vLLM is to maximize throughput and minimize latency; optimizing for the best inference economics and experience for end users. With every request from the end user, it eventually ends up in the engine core, gets scheduled alongside other requests from other concurrent users, executes on the GPU, and updates the KV cache with the new key and value vectors, and streams the tokens back to the user. The Scheduler decides what requests should execute next while continuously batching requests together to maximize GPU utilization. Continuous batching is an inference optimization that allows new requests to join a running batch as other requests finish generating tokens. This helps with keeping the GPU utilization high instead of letting it sit idle waiting for an entire batch to complete generating. After the scheduler dispatches the selected batch to the Model Executor, the Model Executor prepares the tensors and metadata required for inference, retrieves each request’s block table from KV Cache Manager, launches the optimized transformer forward pass on the GPU, computes the logits, updates the KV cache with the new key and value vectors, and finally returns the results for sampling and streaming. The KV Cache Manager uses the PagedAttention memory layout to allocate fixed-size cache blocks on demand and maintains a Free Block Queue on the CPU that tracks which blocks in the GPU’s Paged KV Cache are currently free. When a request needs additional KV cache space, the KV Cache manager takes a free block from the queue and assigns it to that request, thus avoiding an expensive search through GPU memory for available cache blocks. All of these components form the core of vLLM’s inference engine. The Scheduler determines what requests are executed, the Model Executor determines how those requests are executed, the KV Cache Manager determines where each request’s KV cache lives using the PagedAttention Memory Layout. This architecture enables vLLM to serve thousands of concurrent requests with high throughput, low latency, and efficient GPU memory utilization. Heres a little animation that visualizes everything! - I've also completed the forward pass for my mnist.c project. I had a nice chat with shrey birmiwal, such a knowledgeable guy. Excited to learn more about vLLM and implement a tiny-vLLM one day.

max fu

70,797 Aufrufe • vor 2 Monaten