xeon meltdown spectre

Each generation of product is slowly implementing fixes, including some of the chips that Intel announced today. As it currently stands, because the new Coffee Lake Refresh processors, the i9-9900K, the i7-9700K, and the i5-9600K, are built from new silicon designs, Intel was able to implement hardware fixes for variant 3 (rogue data cache load) and L1 terminal fault. @chrisheinonen You are still using THAT DS415+?!! What I would like to see a switch to enable / disable the updates if and only if it slows performance down. Here is the joke: “We […], The first half of last year was relatively weak for Intel’s Data Center Group last year, but despite the coronavirus pandemic – and in some […]. RT @IanCutress: In all the Zen3 melee, don't forget we've now got Zen2 in consoles. We confirmed the patches were applied by using the Inspectre tool before running in patched mode. No big deal, as Google said in its original post. There were two sets of tests here, both on machines running Ubuntu Server. Any data provided by a non-independent party has to be taken with a boulder size grain of salt. The range was 30-50 percent. We will say it again: Run your own tests before and after applying the Spectre and Meltdown patches. Well, the ancestors of Spectre And Meltdown were discovered in1995: “An in-depth analysis of the 80×86 processor families identies architectural properties that may have unexpected, and undesirable, results in secure computer systems.” Now, with 4 KB block sizes, it is still a big deal, but the performance impact was a lot lower once the Retpoline approaches were used. Here’s the thing: While the Linux community seems to be rallying around Retpoline as one of the mitigation methods for such heavy I/O workloads, and while technically the Retpoline changes are very simple, the validation and testing process for these kinds of changes can add a lot of time that enterprises will not be thrilled about. Coffee Lake Refresh? ARM is Fujitsu's choice of successor core to SPARC64+, a architecture Fujitsu invested decades of research and development and testing to offer both commercially and at a national laboratory supercomputing level. We hear through the grapevine that Intel is working on performance tests for open source databases, which it can do without having to work in conjunction with those who control the licenses – and the code – for closed source databases. RT @IanCutress: In all the Zen3 melee, don't forget we've now got Zen2 in consoles. @MrMilli79 @handleym99 @never_released Yeah you just lost all credibility with that statement. I would also like to see the HW, vs. SW/FW, vs. unfixed, Spectre/Meltdown performance impact comparisons. @jfpoole @never_released @handleym99 @MrMilli79 @appleinsider They're rumored to just make things up. Here's @BrettHowse who even managed to benchmark the da…, @ryan_keppel Well it was. These fixes are not in the Core-X Skylake-X Refresh processors as these are still the same silicon but with different binning and cache arrangements. The Variant 2 exploit of Spectre and the Variant 3 exploit that is Meltdown will be mitigated through hardware partitioning of the user and kernel memory spaces. It has been more than two months since Google revealed its research on the Spectre and Meltdown speculative execution security vulnerabilities in modern processors, and caused the whole IT industry to slam on the brakes and brace for the impact. The exact nature of the hardware fix was not revealed. There is a known performance drop due to intersocket communications. I think its way understated here. What’s Really Motivating the Matrix Engine Movement in HPC? And for the same amount of transistors ARM is 50-100x cheaper then duopoly Intel/AMD. Microsoft server os has really evolved in every aspect in the last few years that may take RISC years to catch up on the software side. Here's @BrettHowse who even managed to benchmark the da…, @ryan_keppel Well it was. Intel Publishes Spectre & Meltdown Hardware Plans: Fixed Gear Later This Year, Spectre and Meltdown in Hardware: Intel Clarifies Whiskey Lake and Amber Lake, Intel at Hot Chips 2018: Showing the Ankle of Cascade Lake, An Interview with Lisa Spelman, VP of Intel’s DCG: Discussing Cooper Lake and Smeltdown, Intel CEO Addresses the Industry on Meltdown and Spectre Issues in Open Letter, AT Deals: ASRock B550 Steel Legend Down to $144 at Newegg, AT Deals: Gigabyte B550 Aorus Master Drops to $249 at Amazon, AT Deals: 8TB Seagate IronWolf Hard Drive For $179, $42 Off, Kioxia Announces XD6 Datacenter SSDs: PCIe 4.0 and EDSFF At Scale, Apple Announces Event for November 10th: Arm-Based Macs Expected, Intel’s DG1 GPU Coming to Discrete Desktop Cards Next Year; OEM-Only, NVIDIA Launches Call of Duty Game Bundle for GeForce RTX 3080 & 3090 Cards, Sabrent Rocket Nano Rugged IP67 Portable SSD Review: NVMe in a M.2 2242 Enclosure, Xbox Series X Unboxed: Our First Look At Microsoft’s Next Gen Console, @SudipChahal Left over from Fireworks Night / Guy Fawkes' Night. Never mind all the crappy apps out there that are poorly architected/written in the first place – if you inject too much latency into those; they will misbehave frequently or just break outright and remediating those will be really really difficult.. This is regardless of how much extra headroom you have in your system overall which I can’t see helping these now extra-latency syscalls. All that boundary crossing really hurts performance. @jeffkibuule There are some Tripp-lite models that could be considered too.. one threadripper 2.0 and you can throw all intel configs here into the bin, I wish people keep the topic to the subject and not blab about competitor products. @jeffkibuule I would budget for 1.5x the peak power consumption of all connected devices. The Skylake machine only lost 18 percent of its performance after applying the Spectre and Meltdown patches, the Broadwell machine only lost 22 percent, and the Haswell machine only lost 20 percent. The FIO test does not process the data in any way, just moves it back and forth across the CPU and storage. The Meltdown exploit seems to largely affect Intel Xeon and Core processors and their predecessors back to 2009 or so, when the “Nehalem” architecture cores came out and first used speculative execution and a new cache structure that previous chips did not have. @anthony256. @never_released @pi_is3 @MrMilli79 Thank - last time I fired it up they didn't have the proper kernel package support. On the Broadwell machines, there was a 30 percent hit and on Haswell there was a 27 percent hit. There are several ways to fix the issues, including software, firmware, and hardware updates. We know that Intel is working with all of the hypervisor suppliers to tune up their code and reduce the impact of the patches. In the general and high performance computing segments – meaning integer and floating point workloads – the impact has been nominal. Someone should really take a look at real-world businessware application like SAP or Siebel or Oracle*Apps etc. Which brings us all the way back around to the future “Cascade Lake” Xeon SP processors, which have now been confirmed by Intel as coming in the second half of 2018 along with the 8th generation Core processors for PCs. Thanks to the Skylake architecture change, there was no performance impact. And apparently Intel’s tests show the effect of microcode and operating system updates on “Haswell,” “Broadwell,” and “Skylake” generations of Xeon processors, running on two socket machines. The Skylake architecture in particular has better performance because its design – in a happy coincidence – requires fewer IBRS hits at any block size. If it tries to read something not in the cache, it will complete slower. On the other side of the spectrum is the Flexible I/O, or FIO, storage benchmark test, and this is a worst case scenario. The network test showed low overhead for a HW offload scenario which may (will) not be applicable to many customers out there. You can read our analysis of the Spectre and Meltdown issues in the following articles: For the overall score, every processor lost some performance: The biggest overall loser in real terms was the W-2155, which mixes single core performance with many threads. When I mean enable/disable I mean a switch in bios and actually prefer it control by the OS. The performance impact is much worse than any article says it is. The Meltdown exploit seems to largely affect Intel Xeon and Core processors and their predecessors back to 2009 or so, when the “Nehalem” architecture cores came out and first used speculative execution and a new cache structure that previous chips did not have. 3D TLC, & not QLC ✅ In the technology segment, the year 2019 was soon marked by vulnerabilities that particularly affect Intel processors. At least I just woke up to some good news. If the application is running flat out on the CPU, using all of its processing capacity, then there is only one way for performance to go – and that is down. The HCC die has extra core-to-core latency because of the larger floorplan, which might hide some of the deficiencies here. ARM is therefore not a knee jerk choice of direction for a very interesting super builder. We also talked a bit about the performance impact on networking and compute in the HPC space in this story. “Prefetching may fetch otherwise inaccessible instructions in virtual 8086 mode”, https://pdfs.semanticscholar.org/2209/42809262c17b6631c0f6536c91aaf7756857.pdf. That’s going to be a really fugly situation that will make the overheads described in this article not-so-useful. So, to sum up, the characteristics of the application and how it uses user and kernel memory space and the utilization of the application as it is running on the system will be big determinants of the effect of the speculative execution mitigation on overall performance. has told PC and server buyers that the company will be adding features in its next generation of Core and Xeon processors, then followed up with details about how it has fixed them in its own code for its own systems, the patching in the wake of the announcement of the Spectre and Meltdown security holes here, did a follow-on deeper dive on mitigation plans there, talked a bit about the performance impact on networking and compute in the HPC space in this story, The Ticking And Tocking Of Intel’s “Ice Lake” Xeon SP, Intel Needs To Engineer Its Financial Future, Pandemic Compute Needs Drive Intel’s Data Center Group. That's an oof from me https://t.co/uPkzkcLFKQ, Slept 30 hours in the last 48 after ~5 in 48. If all things are equal, then what you say is true. The reason for this modest hit is simple enough. Solid & Rugged ✅ Why ARM is just digging its buggers watching the game where it can beat Intel ? This stands to reason. After 40 hours of … Yes but with CL you are going to run into conflict with the upcoming Cannon Lake CPU’s and their eventual refreshes. @never_released @pi_is3 @MrMilli79 Thank - last time I fired it up they didn't have the proper kernel package support. This article isn’t bad but I don’t think it paints an accurate picture of what customers will endure. @jeffkibuule I was talking about POE switches and cameras :) servers are a different deal, depends on what your alw… https://t.co/Kp8T1pzosL. Speculative execution has been part of CPU architectures for more than a decade, in one form or another, and there is no way to turn it off by flipping a bit somewhere in the chip to do a baseline test that would separate speculative execution from other aspects of chip performance, such as the length of the instruction pipeline, out of order execution, prefetching and branch prediction algorithms, the scale of threading or absence of it, and L1, L2, and L3 caching hierarchy across the chip architecture. We’ve updated our terms. What is a i9-9500K, did you mean i5-9600K and if not, does that have the hardware fix for meltdown variant 3. Skylake systems took a 1 percent hit on generic tests (probably SGEMM or DGEMM), while Broadwell did the same and Haswell actually did a 1 percent better. It’s getting weird for sure. The old load balancer was doing just fine until AMD broke it with news of all of their awesome hardware, @dadsized @anandtech Not since we switched from hosting our own hardware to running VMs on our host's cloud infrast… https://t.co/tyyfIP2NhF, RT @anandtech: Compact ✅ (Go figure.) On a server that is isolated and without a browser it would be very difficult to find it (its not a web server) and then would have to get the code on it to run it. It has been a long time since Intel changed its manufacturing process – what it used to call a “tick” – and the microarchitecture and […], Somewhere nearly a decade ago, we made a joke when looking at the rise of the hyperscalers and cloud builders. And does it actually effect clients or is it only servers. We used TrDrop since it's the best tool th… https://t.co/fygGgWG1hV. Meltdown & Spectre: Analyzing Performance Impacts on Intel's NUC7i7BNH, Intel Publishes Spectre & Meltdown Hardware Plans: Fixed Gear Later This Year, Intel CEO Addresses the Industry on Meltdown and Spectre Issues in Open Letter, Intel Forms Product Assurance and Security Group amid Meltdown and Spectre Fallout, Understanding Meltdown & Spectre: What To Know About New Exploits That Affect Virtually All CPUs, Benchmarking Performance: CPU Legacy Tests. Server side Java applications were the same on Skylake machines and took a 2 percent hit on Broadwell and Haswell machines. On Linpack, the Skylake systems were the same before and after the Spectre and Meltdown patches were applied to the microcode and Linux operating system; Broadwell took a 1 percent hit, and Haswell once again did 1 percent better. On most processors, the speculative execution resulting from a branch misprediction may leave observable side effects that may reveal private data to attackers. ARM is RISC which is completely from CISC so applications and os are limited. Intel did say that the Variant 1 Spectre exploit would have to be mitigated through software patches, so this is not a complete hardware fix. For application runtimes, however, we start to see some effects, and to illustrate this, the benchmark was based on the HipHop Virtual Machine (HHVM) developed by Facebook, which it uses to speed up PHP applications, and it ran a WordPress content management system benchmark. that use an Oracle/DB2/MSSQL backend and do hundreds of millions of memory-centric shmem/sema/msgq syscalls all friggin day long in addition to poll()ing network clients and a mega boatload of io syscalls. I wonder when 6 channel memory comes to consumer level CPUs. To fix some of these issues, Intel created model specific registers, or MSRs, in the microcode. Solid & Rugged ✅ Now its getting overblown and over hyped. 3D TLC, & not QLC ✅ And given that on this storage benchmark the CPUs are running full out at 100 percent utilization, there is only one way for the performance to go, and it ain’t up. https://t.co/KjcNYOPvJt, @handleym99 @caribbeanxblue @never_released @MrMilli79 No phone sustains more than 4W in normal conditions, i do ab… https://t.co/Tuwwl9eHUz. same question about SKX-R. I have yet seem a real case that Spectre/ Meltdown stuff lead to any real security holes. The interesting bit is that what no one knows is how much of a performance gain speculative execution has given to applications in general and therefore no one can really know how much of that performance boost has been given back as a result of these mitigations. Spectre and Meltdown vulnerabilities made quite a splash earlier this year forcing makers of hardware and software to release updates in order to tackle them. When you overclock basicay blows… https://t.co/vWluDW8QRZ. Skylake and Broadwell systems have a 1 percent hit on integer throughput tests, and Haswell had the same. There are even extensive fireworks going off here, @lafantaisiejess @SpaltersBlag @kopite7kimi @anandtech What is it about rated non-OC default settings, which are th… https://t.co/poJnwrvZm1, @DanMatte @BrettHowse Microsoft did not provide any perf analysis tools. In the communications infrastructure area, the benchmark to assess the Spectre and Meltdown patches was based on Layer 3 packet forwarding using its Data Plane Developer Kit, or DPDK, software. Somehow we got by for 30 years with the holes and the sky did not fall. The thing to remember about this is that benchmarks are run at peak utilization, and if you have headroom in the systems, then it might not be this bad. There are even extensive fireworks going off here, @lafantaisiejess @SpaltersBlag @kopite7kimi @anandtech What is it about rated non-OC default settings, which are th… https://t.co/poJnwrvZm1, @DanMatte @BrettHowse Microsoft did not provide any perf analysis tools. By contrast, just like Cascade Lake and Whiskey Lake, the 9th Gen Core i7/i9 processors feature a number of hardware mitigations. Every time a block of data is moved, that represents a user-kernel transition and the speculative execution data registers have to be flushed out. The Next Platform is published by Stackhouse Publishing Inc in partnership with the UK’s top technology publication, The Register. if you would know anything about cpu scalable systems you would not ask these questions. This WordPress test using HHVM had about a 10 percent performance impact across the Xeon systems tested (Skylake did 91 percent, Broadwell and Haswell did 90 percent), and this PHP application has more user-kernel transitions, driven by the I/O requests coming into the servers, so the impact is greater. Two of the exploits are known as Spectre, and one is known as Meltdown, and here is what the exploits are called and what the security notices related to them are: The Variant 1 and Variant 2 exploits are collectively known as Spectre, and Variant 3 is known as Meltdown. If the workload doesn't require an abundance of socket to socket communications, then it is conceivable that the two socket solution may have merit is such circumstances. In the one set of FIO tests, 64 KB block sizes were used, with one core is pegged with two NVM-Express flash drives, and the idea was to just hammer that core as much as possible. AT Deals: ASRock B550 Steel Legend Down to $144 at Newegg, AT Deals: Gigabyte B550 Aorus Master Drops to $249 at Amazon, AT Deals: 8TB Seagate IronWolf Hard Drive For $179, $42 Off, Kioxia Announces XD6 Datacenter SSDs: PCIe 4.0 and EDSFF At Scale, Apple Announces Event for November 10th: Arm-Based Macs Expected, Intel’s DG1 GPU Coming to Discrete Desktop Cards Next Year; OEM-Only, NVIDIA Launches Call of Duty Game Bundle for GeForce RTX 3080 & 3090 Cards, Sabrent Rocket Nano Rugged IP67 Portable SSD Review: NVMe in a M.2 2242 Enclosure, Xbox Series X Unboxed: Our First Look At Microsoft’s Next Gen Console, @SudipChahal Left over from Fireworks Night / Guy Fawkes' Night. The tests, we hear, were done in the past seven weeks, and the key takeaway is that the manner in which the application is written, what the application does, and how often it does certain things has a great effect on the performance hit from the Spectre and Meltdown patches. The Next Platform caught wind of these initial benchmark test results, which were done to try to quantify the performance impact of the Spectre and Meltdown security vulnerability patches to both system microcode and operating system kernels. This workload is explicitly designed to do a kernel bypass to get increased throughput for that packet forwarding, so again there is not much of a performance hit from the Spectre and Meltdown mitigations and this is not really a surprise. As we were performing this testing, the issue of Spectre and Meltdown reared its ugly head. https://t.co/KjcNYOPvJt, @handleym99 @caribbeanxblue @never_released @MrMilli79 No phone sustains more than 4W in normal conditions, i do ab… https://t.co/Tuwwl9eHUz. a 2*12 vs 1*24 will be roughly 20% slower if your application scales cross the total core count due to in between socket communication. Now, let’s talk about the test results that we have caught wind of. The long and short of the discussions about Intel results were that the patches affected systems with older the most, and systems that had fast storage (SSD vs HDD) also took the brunt of the performance hit. It was around this time that Intel also reached out to us to give us the results of their own performance testing relating to the patches. Here Is The List Of Intel CPUs Affected By Spectre & Meltdown. @DanMatte It's not a common resolution. At least I just woke up to some good news. When you overclock basicay blows… https://t.co/vWluDW8QRZ. Google put out a notice about the bugs and then followed up with details about how it has fixed them in its own code for its own systems. So in essence each syscall is really a time/latency critical operation that are all ultimately chained together for true/representative app/db performance. This is not necessarily representative of the real world because end users turn on various amounts of logging, depending on how they want to keep track of performance of the database or do tuning on it. Headroom != latency. The applications most affected by the Spectre and Meltdown mitigation have a larger number of user/kernel privilege changes; have a high number of system calls, interrupt rates, or page faults; do a lot of transitioning between guest virtual machines and hypervisors; or spend a lot of time inside the hypervisor or running in privileged mode. Capacious ✅ Anthony Garreffa . The core problem with both Meltdown and Spectre lies within the CPU’s cache. After 40 hours of testing, we realised that the motherboard was not BIOS patched for the latest issues, and we reached out to get the latest update, and had to retest all over again. Additionally what does CFL-R mean? As we were performing this testing, the issue of Spectre and Meltdown reared its ugly head. On the database front, Microsoft and Intel have done some performance tests together with SQL Server, and the performance hit with no database logging activated was around 4 percent. An application can attempt to read memory and, if it reads something in the cache, the operation will complete faster. That brings us to the actual mitigation techniques. I am curious why Xeon W for same core count is typically slower than Core X - also I notice the Scalable CPU have much more functionally especially related to reliability. Featuring highlights, analysis, and stories from the week directly from us to your inbox with nothing in between. Also the Scalable CPU's also appear to have 6 channel memory instead of 4 Channel memory. In normal applications it may be possible not necessary - possible in drivers. The FIO test is set it up to run on a certain number of cores on the system, which has a specific number of storage devices (be they disk or flash) pinned to those cores; the test run allows a specific block size and a percentage of reads and writes in the I/O mix. @pi_is3 @never_released @MrMilli79 No performance counters on Graviton2, and the workstation front is still bleak a… https://t.co/IiGNuopj6P, @lafantaisiejess @SpaltersBlag @kopite7kimi @anandtech What they're capable of vs. In effect, what Intel has done with microcode and operating system kernel tweaks will not be done at a much lower level below the operating system and the microcode, down in the transistors, and the overhead issues will be lessened, presumably. We cased the patching in the wake of the announcement of the Spectre and Meltdown security holes here, and did a follow-on deeper dive on mitigation plans there. That brings us to storage workloads, which are presenting a bit of a challenge. Now, because the FIO hit was so bad, another set of FIO benchmark test code was used, but this time with the Retpoline changes in its code as Google has suggested, for both scenarios – 64 KB and 4 KB block sizes. With the kernel and user memory spaces now separated, every time you cross that boundary, transitioning from user mode to kernel mode, that transition requires the flushing of the data that has been speculatively executed before the application can proceed, and this eats up CPU cycles.