Já někde psal o desktopu? Tak určitě na desktopu provozuješ hned několik SQL instancí a aplikace využívající RNG instrukcehnizdo píše:Ano, zcela urcite.
When it came to evaluating different desktop workloads on the Core i5 8400, the RdRand performance was impacted as expected but given that RdRand / RDSEED is not used prolifically especially by desktop workloads, for the other benchmarks the performance was basically unchanged.
Takze jeste jednou.Krteq píše:Já někde psal o desktopu? Tak určitě na desktopu provozuješ hned několik SQL instancí a aplikace využívající RNG instrukce
COMSEC - Branch Privilege Injection: Exploiting Branch Predictor Race ConditionsIntel has developed a microcode update for affected processors and provided us with one to evaluate on Alder Lake. We were able to verify that the microcode update stops our primitives that we use in the paper to detect the vulnerabilities. Our performance evaluation shows up to 2.7% overhead for the microcode mitigation on Alder Lake. We have also evaluated several potential alternative mitigation strategies in software with overheads between 1.6% (Coffee Lake Refresh) and 8.3% (Rocket lake). Please refer to our paper for more details.
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- Is my machine affected?
All intel processors since the 9th generation (Coffee Lake Refresh) are affected by Branch Privilege Injection. However, we have observed predictions bypassing the Indirect Branch Prediction Barrier (IBPB) on processors as far back as 7th generation (Kaby Lake).
- Does Branch Privilege Injection affect non-Intel CPUs?
No. Our analysis has not found any issues on the evaluated AMD and ARM systems.
