PMC accronyms.. what do they stand for..
Lingua Inglese Hi, I am trying to understand the PMC purposes in the Intel System Guide 2 so as to measure the PMC performance on my SandyBridge cpu. Can someone tell me what: IQ (as in PMC 87H) PMH...
View ArticleSandy Bridge L2 Writeback to L3, PMC 0xF2
Lingua Inglese Hello, I am measuring the PMC 0xF2 to get the evictions from the L2 to the L3 due to DEMAND REQUEST and from the L2 HW PREF. In each source, the evictions are reported for CLEAN and...
View ArticleMeasuring L2 -> L1 Fill latency..
Lingua Inglese I am trying to measure the L2 -> L1 Fill latency. I'm using PMC 0x48 umask=0x01. This increments each cycle the number of Line Fill Buffers currently allocated, right? If I also...
View ArticleMemory Buffers
Lingua Inglese Intel optimization guides and presentations mention many types of memory access buffers.
View ArticleOut of order loading
Lingua Inglese I have a long sequence of data independent memory reads in my program. The data may ormay not be in the cache memories.In a typical Intel system, say Core 2 Duo, what isthe number of...
View Articlechange processor t5300 of my laptop
Lingua Inglese hello, first i apologies because i don't speak english very well. I want to change my intel t5300 533MHz FSB processoron laptop but i chek on web site, no-one has the same FSB. all have...
View Articleexamine L1 instruction cache
Lingua Inglese Greetings!I has been encouraged by some people to measure the effect of L1 instruction cache.(is known to be of 32kb on core2duo machine).Methodology which I chose:1) generate 100kb of...
View ArticleIs underclock harmful to the microprocessor?
Lingua Inglese Hi Intel community:That is the question: Is the underclock harmful or not recommendable for the microprocessor? I own an Intel Core i7 2630QM 2.0Ghz. I think that underclock is not bad...
View ArticleAES-NI instructions statistics
Lingua Inglese Is there a way how to get information about total number of AES-NI instructions executed on a CPU (core), size of data processed with the intructions, etc. ?
View ArticleSoftware Tuning
Lingua Inglese May i know about Software tuning ?Any benefit in web development through this?
View ArticleSlow math performance on i7-5960X vs i7-3820
Hi, I'm running my own C++ developed neural net simulation software.I have two machines with an i7-5960X and an i7-3820 at similar clock speeds. The same code (single threaded) runs much more slowly...
View ArticleUnderstanding OFFCORE_RESPONSE_0 and 1
I am new to hardware counter measurements on intel. I want to measure L3 misses to local and remote DRAM on Intel Ivy bridge Model 62(Intel(R) Xeon(R) CPU E7-4860):I need to understand the difference...
View ArticleTsc-deadline feature. Cpu family ?
Hello,I know that the tsc-deadline ( != tsc) feature has been added on recent intel cpu.My question is: on which families ?Thanks !
View ArticleRDTSCP & cache misses
Hi all,I would like to benchmark some parts of my application using RDTSCP counters. My only concern with RDTSCP is if it takes into consideration L1/L2/LLC misses. The plan is to benchmark how long...
View ArticleCache Allocation Technology - Current specs (allocation granularity, number...
Hi, I am interested in testing out the new Intel Cache Allocation Technology. However I have been unable to find the specifications of CAT functionality provided by the 6 processors. I would like to...
View ArticleNUMA options in BIOS
Hi , i run my multi-thread application on a XEON E5_2620 that has NUMA on/off option in the BIOS. i profile my application using pcm-numa of intel PCM. when i disable hyperthreading as well as the...
View ArticleCan't download PCM 2.8
When I try to download PCM 2.8, starting from this page:https://software.intel.com/en-us/articles/intel-performance-counter-monitorI have to log in, then accept an open source license, and then finally...
View Article[PCM] building OS X driver fails
Danilcha D commented on the Intel PCM article::Hello!Could you please help me?I was building the OS X driver and it failed: Check dependencies [BEROR]error: There is no SDK with the name or path...
View Article[PCM] Kernel panic on OS X 10.9
Hello,My computer restarts every time I try to launch a simple program: PCM *m = PCM::getInstance(); if (m->program(PCM::DEFAULT_EVENTS, NULL) != PCM::Success) { std::cerr << "Failed to start...
View ArticleA curious bandwidth result
Now I am testing Stream Benchmark on a Numa System including two Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz. The compiler is GCC. I use a OpenMP version with 12 threads. I know that Numa system allocate...
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