Re: [osol-discuss] Measuring cost of TLB misses
Thank you, Marty. -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] Measuring cost of TLB misses
Thank you, Bart. -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] Measuring cost of TLB misses
You can also use Oracle Solaris Studio to profile your application using one of the TLB HW counters. Various counters are available depending on the precise Opteron chip model. To do such a profile: collect -h l2dtlbm a.out args will collect a statistical profile, and show which functions and source lines had the most L2 DTLB misses. Marty dot Itzkowitz at oracle dot com Project Lead, Oracle Solaris Studio Performance Tools -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] Measuring cost of TLB misses
On 08/20/10 21:21, Kishore Kumar Pusukuri wrote: Hi, I am able to measure TLB miss-rate of a multi-threaded application running on my multi-core AMD Opteron machine by reading performance monitoring event counters using cpustat utility. However, I would like to measure the amount of time spent on TLB misses? Specifically, I am looking a way like the utility trapstat functions. Please share your ideas. TLB miss costs (e.g. page table walk) costs can be estimated by writing code that misses in both cache and tlb, and comparing steady state performance to that of otherwise similar code that misses only in cache. Keep in mind that different size pages may take different amounts of time, and that modern processors do an amazing job of predicting access patterns - so attempts to miss in cache will prob. need some random component. You may find http://icl.cs.utk.edu/projectsfiles/hpcc/RandomAccess/ to be interesting reading... - Bart -- Bart Smaalders Solaris Kernel Performance bart.smaald...@oracle.com http://blogs.sun.com/barts You will contribute more with mercurial than with thunderbird. ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
[osol-discuss] Measuring cost of TLB misses
Hi, I am able to measure TLB miss-rate of a multi-threaded application running on my multi-core AMD Opteron machine by reading performance monitoring event counters using cpustat utility. However, I would like to measure the amount of time spent on TLB misses? Specifically, I am looking a way like the utility trapstat functions. Please share your ideas. Thank you. -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
