I know that modern CPUs do OoO execution and got advanced branch predictors that may fail, how does the debugger deal with that? So, if the cpu fails ...
I know that modern CPUs do OoO execution and got advanced branch predictors that may fail, how does the debugger deal with that? So, if the cpu fails ...
There are [[likely]] and [[unlikely]] attributes in modern C++. There are corresponding __builtin_expect(x, 1) and __builtin_expect(x, 0) builtins in ...
Let's say I have a Spark 2.x application, which has speculation enabled (spark.speculation=true), which writes data to a specific location on HDFS. N ...
As I understand, when a CPU speculatively executes a piece of code, it "backs up" the register state before switching to the speculative branch, so th ...
Is this correct that Hardware Lock Elision is disabled for all current CPUs due to Spectre mitigation, and any attempt to have a mutex using HLE intri ...
I'm coding a web app at present that uses an Implicit Grant flow for the browser to obtain an ID token that is attached to all subsequent requests to ...
Let's say I run a job in Spark with speculation = true. If a task (let's say T1) takes a long time, Spark would launch a copy of task T1, say, T2 on a ...
Alright, so I know that if a particular conditional branch has a condition that takes time to compute (memory access, for instance), the CPU assumes a ...
I have a hypothesis that speculative execution on Intel Nehalem (1 gen) causing a crash. Is it possible or I completely wrong? If this is possible wha ...
CVE-2018-12126 has been assigned to MSBDS (Microarchitectural StoreBuffer Data Sampling), a vulnerability of Intel's processors belonging to the newly ...
The Memory Order Machine Clear performance event is described by the vTune documentation as: The memory ordering (MO) machine clear happens when a ...
I'm trying to create a specpoline (cfr. Henry Wong) on my Kabe lake 7600U, I'm running CentOS 7. The full testing repository is available on GitHub. ...
I'm trying to understand in detail what happens to instructions in the various stages of the skylake CPU pipeline when a branch is mis-predicted, and ...
Considering these two methods: Dynamic Bimodal: Where we have 4 stages, 2 stages for each (taken or not taken), and alternating every tim ...
CPU's use branch prediction to speed up code, but only if the first branch is actually taken. Why not simply take both branches? That is, assume bot ...
I have read the wikipedia page about out-of-order execution and speculative exectution. What I fail to understant though are the similarities and di ...
What are the key differences between recently discovered hardware vulnerabilities Meltdown and Spectre? I know that they both rely on speculative exec ...
I have a situation where some of the address space is sensitive in that you read it you crash as there is nobody there to respond to that address. ...
I know Hadoop/Spark framework will detect failed or slow machines and execute the same tasks on different machine. How will (On what basis) framework ...
If I understand branching correctly (x86), the processor will sometimes speculatively take a code path and perform the instructions and 'cancel' the r ...