eb | aka eblib, aka libeb

Assembly novice here. I've written a benchmark to measure the floating-point performance of a machine in computing a transposed matrix-tensor product.

Given my machine with 32GiB RAM (bandwidth ~37GiB/s) and Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz (Turbo 4.0GHz) processor, I estimate the maximum performance (with pipelining and data in registers) to be 6 cores x 4.0GHz = 24GFLOP/s. However, when I run my benchmark, I am measuring 127GFLOP/s, which is obviously a wrong measurement.

Note: in order to measure the FP performance, I am measuring the op-count: n*n*n*n*6 (n^3 for matrix-matrix multiplication, performed on n slices of complex data-points i.e. assuming 6 FLOPs for 1 complex-complex multiplication) and dividing it by the average time taken for each run.

Code snippet in main function:

I have implemented a Convolutional Neural Network in C and have been studying what parts of it have the longest latency.

Based on my research, the massive amounts of matricial multiplication required by CNNs makes running them on CPUs and even GPUs very inefficient. However, when I actually profiled my code (on an unoptimized build) I found out that something other than the multiplication itself was the bottleneck of the implementation.

After turning on optimization (-O3 -march=native -ffast-math, gcc cross compiler), the Gprof result was the following:

Clearly, the convolution2D function takes the largest amount of time to run, followed by the batch normalization and depthwise convolution functions.

The convolution function in question looks like this:

This is the first time I am attempting to parse a variable to a CF query, but I have run into a few little issues.

In summary, I am creating a pivot table of sales by operators by week. Manually, no hassle, but I only want a subset of weeks, not all. Again, no real problem if I want hardcoded weeks, but the problem comes in when I try and parse a week number to the SQL query to create the subset of dynamic weeks.

The CFDUMP shows me that the query is executing based on what I am sending to it, but when it comes to outputting the value of the field (the week), it takes the variable name value, and not the field value if that makes sense?

I know that I shouldn't be having field names as values, but I still tryingh to test right now. With the manual query, I prefix the week number with a 'W' e.g. W9, but when I try and do that I get

MANUAL QUERY

I wanted to know how methods are implemented in C++. I wanted to know how methods are implemented "under the hood". So, I have made a simple C++ program which has a class with 1 non static field and 1 non static, non virtual method.

Then I instantiated the class in the main function and called the method. I have used objdump -d option in order to see the CPU instructions of this program. I have a x86-64 processor. Here's the code:

I'm trying to create a Elastic Beanstalk environment with node.js platform. When I try to add RDS in EB, console is throwing error and I don't know the reason why. If you have any idea, plz leave a comment, thanks.

My CircleCI file is provided:

I have tried the similar problems' solutions on here but none seem to work. It seems that I get a memory error when installing tensorflow from requirements.txt. Does anyone know of a workaround? I believe that installing with --no-cache-dir would fix it but I can't figure out how to get EB to do that. Thank you.

Logs:

I am at a complete loss and really freaking out, because this project of mine was close to being done. I will give out a bounty for the answer that helps me (when I can). I am desperate, please help.

I have an Elastic Beanstalk project that has been working fine for literally months. Today, I decide to enable and disable a port listener as seen in the photo below:

I enabled port 80 and then the website stopped working. So I was like "oh crap, I will change it back". But guess what? It is still broken. The code has not changed whatsoever, but the application is now broken and I am freaking out.

I have restarted the app servers, rebuilt the environment and nothing. I can't even access the environment site by clicking Go to environment. I just see a Bad Gateway message on screen. The health status of the environment when first deployed is OK and then quickly goes to Severe.

If my code has not changed, what is the deal here? How can I find out what is going on here? All I changed was that port, by enabling and then disabling again.

I have already come across this question: Question and I am already doing this. This environment variable is on my application.properties file like this: server.port=5000 and its been like this for months and HAS ALREADY been working. So this can't be the reason that it broke today. I even tried adding it directly to the environment variables in Elastic Beanstalk console and same result, still getting 502 Bad Gateway.

I also have a path for the health-check configured and this has not changed in months.

Here are the last 100 lines from my log file after health status goes to Severe:

I am trying to create a stack (see code below)

but I get the following error: