caching

问题 I want to disable the low level cache on an ARMv8-A platform running Linux, in order to measure performance of optimized code, independent of cache access. For Intel systems I found the following resource (Is there a way to disable CPU cache (L1/L2) on a Linux system?), but I can not directly be applied directly due to a different instruction set. So far I have a kernel module which alters the corresponding system register to disable instruction and data cache. #include <linux/module.h> int

问题 I want to disable the low level cache on an ARMv8-A platform running Linux, in order to measure performance of optimized code, independent of cache access. For Intel systems I found the following resource (Is there a way to disable CPU cache (L1/L2) on a Linux system?), but I can not directly be applied directly due to a different instruction set. So far I have a kernel module which alters the corresponding system register to disable instruction and data cache. #include <linux/module.h> int

问题 From Optimizing Software in C++ (Section 7.1), The advantage of static data is that it can be initialized to desired values before the program starts. The disadvantage is that the memory space is occupied throughout the whole program execution, even if the variable is only used in a small part of the program. This makes data caching less efficient. The usage of static in this except is as it applies to both C and C++ in the exact case of static storage duration. Can anyone shed some light on

问题 In django, I wrote a view that simply returns a file, and now I am having problems because memcache is trying to cache that view, and in it's words, "TypeError: can't pickle file objects". Since I actually do need to return files with this view (I've essentially made a file-based cache for this view), what I need to do is somehow make it so memcache can't or won't try to cache the view. I figure this can be done in two ways. First, block the view from being cached (a decorator would make

问题 In django, I wrote a view that simply returns a file, and now I am having problems because memcache is trying to cache that view, and in it's words, "TypeError: can't pickle file objects". Since I actually do need to return files with this view (I've essentially made a file-based cache for this view), what I need to do is somehow make it so memcache can't or won't try to cache the view. I figure this can be done in two ways. First, block the view from being cached (a decorator would make

问题 We use our gitlab-ci to build fresh images with the latest version of our code. These images are day to day built with the latest tag. We tag images during the release process. My problem is related to the latest tag. We deploy automatically these images on servers to test our product. However, on a test server if we pull the latest docker image (verified by its checksum), stop the compose and up it again, we sometime still have the content of the old image (for example a configuration file).

问题 With localhost Angular PWA service worker works fine in all scenarios, BUT After deployment (on Azure server with GIT pipeline), In Online mode all works fine: 1. Service Worker is registered. 2. API responses are cached. Now when i go offline, the service worker still tries to fetch the api response from Network( and give 504 error since its offline mode) INSTEAD of taking those responses from CACHE. I can see the data there in cache, But the problem is that ServiceWorker still tries to

问题 With localhost Angular PWA service worker works fine in all scenarios, BUT After deployment (on Azure server with GIT pipeline), In Online mode all works fine: 1. Service Worker is registered. 2. API responses are cached. Now when i go offline, the service worker still tries to fetch the api response from Network( and give 504 error since its offline mode) INSTEAD of taking those responses from CACHE. I can see the data there in cache, But the problem is that ServiceWorker still tries to

问题 I was reading about immutable header and i came across with this article saying that: Cache-Control: max-age=365000000, immutable When a client supporting immutable sees this attribute it should assume that the resource, if unexpired, is unchanged on the server and therefore should not send a conditional revalidation for it (e.g. If-None-Match or If-Modified-Since) to check for updates. Correcting possible corruption (e.g. shift reload in Firefox) never uses conditional revalidation and still

问题 I was reading about immutable header and i came across with this article saying that: Cache-Control: max-age=365000000, immutable When a client supporting immutable sees this attribute it should assume that the resource, if unexpired, is unchanged on the server and therefore should not send a conditional revalidation for it (e.g. If-None-Match or If-Modified-Since) to check for updates. Correcting possible corruption (e.g. shift reload in Firefox) never uses conditional revalidation and still