After a few years, collecting various equipment, it’s time to do a quick checklist of what I have. Continue reading
My Gear
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Symmetric RSS (Receive-Side scaling)
Receive-Side scaling is a good method, supported by hardware NIC vendors to load-balance traffic flows,up to 5 tupples, to different cores. This helps for the locality of reference and cache coherency (which improves performance).
Tunneling And Network Virtualization: NVGRE, VXLAN
The hype about NVGRE and VXLAN tunneling protocols begun 2 years ago. It is important to remebmer that tunneling protocols are minor components of a full virtualized network. Continue reading
אופציות ומינוף
לאחרונה שואלים אותי כיצד אני מבצע מינוף ומה זה בכלל אופציות. ובכן, אופציות הן מכשיר פיננסי, שניתן באמצעותו לבצע גידור על השקעה, ואף מינוף.
CPU Performance Measurment
The basic measurement of a computing system is speed. Speed is is measured by:
- Execution time (or latency)
- Throughput
Throughput is usually relevant to I/O, particularly in large systems which handle many jobs.
Reducing the execution time will nearly always improve throughput, but not the reverse.
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ביטוח מנהלים ומקדם קצבה
ביטוחי המנהלים כוללים בתוכם מקדם קצבה. כלל הצבירה בפוליסה, מחולק במקדם זה והוא בעצם קובע את קצבת הפנסיה החודשית. להבדיל מקרן פנסיה, מקדם זה הינו קבוע. מכיוון שכך, ניתן לראות בביטוח מנהלים בעצם כביטוח מפני תוחלת חיים מעל הממוצע. לדעתי, רבים לא מעריכים את כדאיות הביטוח .בצורה נכונה
NUMA aware memory allocation
NUMA?
Non Uniform Memory Access (NUMA) has become a buzzword nowadays. To fully understand what exactly it means, we need to get back to the old days, where there processor count on a single board was single.
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Zero cache miss – Really ?
In the packet processing world, usually the goal is to achieve one cache miss throughout the “life of the packet” in the system. Not many know, but in the latest Intel architectures, there is a new feature called “DCA”, which stands for Direct Cache Access.
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Xiaomi Hongmi Note
Last week I got a new cell phone made by the Chinese company “Xiaomi”.
My expectations, weren’t high, as i was already familiar with some previous Chinese knock-off phones. Boy, I was wrong !.
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Why did I start to write this blog ?
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After I’ve found myself seeking after other people’s experience, answers to my dailies issues, and after being asked for the same issues, I’ve decided to share my experience in this blog. I took the opportunity to share more fields of interests, rather than just technology, such as investments, and photography.
My intention is to keep it simple, provide some initial thoughts and reference for other articles that I found interesting. The target audience is mainly for technology enthusiasts, focusing on the practical side, with minimal knowledge requirements.