{"id":4262,"date":"2016-08-20T18:08:01","date_gmt":"2016-08-20T17:08:01","guid":{"rendered":"https:\/\/stevepedwards.today\/DebianAdmin\/?p=4262"},"modified":"2016-08-20T18:08:01","modified_gmt":"2016-08-20T17:08:01","slug":"how-slow-can-you-go-old-and-new-tech-moores-law-comparison-3-memory","status":"publish","type":"post","link":"https:\/\/stevepedwards.today\/DebianAdmin\/how-slow-can-you-go-old-and-new-tech-moores-law-comparison-3-memory\/","title":{"rendered":"How Slow Can You Go? Sysbench Comparisons – Memory"},"content":{"rendered":"
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stevee@AMDA8 ~ $ sudo sysbench --test=mutex --memory-oper=read<\/strong> run<\/span>
\n[sudo] password for stevee:
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0071s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0066<\/strong><\/span>
\nper-request statistics:
\nmin: 6.57ms
\navg: 6.57ms<\/span>
\nmax: 6.57ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0066\/0.00<\/p>\n

stevee@AMDA8 ~ $ sudo sysbench --test=mutex --memory-oper=write<\/strong> run<\/span>
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0086s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0080<\/strong><\/span>
\nper-request statistics:
\nmin: 8.01ms
\navg: 8.01ms<\/span>
\nmax: 8.01ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0080\/0.00<\/p>\n

stevee@hpmint ~ $ sudo sysbench --test=mutex --memory-oper=read<\/strong> run<\/span>
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0117s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0112<\/strong>
\nper-request statistics:
\nmin: 11.21ms
\navg: 11.21ms
\nmax: 11.21ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0112\/0.00<\/p>\n

stevee@hpmint ~ $ sudo sysbench --test=mutex --memory-oper=write<\/strong> run<\/span>
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0116s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0108<\/strong>
\nper-request statistics:
\nmin: 10.81ms
\navg: 10.81ms
\nmax: 10.81ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0108\/0.00<\/p>\n

stevee@DELLMINT ~ $ sudo sysbench --test=mutex --memory-oper=read<\/strong> run<\/span>
\n[sudo] password for stevee:
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0111s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0103<\/strong>
\nper-request statistics:
\nmin: 10.34ms
\navg: 10.34ms
\nmax: 10.34ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0103\/0.00<\/p>\n

stevee@DELLMINT ~ $ sudo sysbench --test=mutex --memory-oper=write<\/strong> run<\/span>
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0120s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0111<\/strong>
\nper-request statistics:
\nmin: 11.06ms
\navg: 11.06ms
\nmax: 11.06ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0111\/0.00<\/p>\n

stevee@localhost ~ $ sudo sysbench --test=mutex --memory-oper=read run<\/span>
\n[sudo] password for stevee:
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0132s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0126<\/strong>
\nper-request statistics:
\nmin: 12.62ms
\navg: 12.62ms
\nmax: 12.62ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0126\/0.00<\/p>\n

stevee@localhost ~ $ sudo sysbench --test=mutex --memory-oper=write run<\/span>
\nsysbench 0.4.12: multi-threaded system evaluation benchmark<\/p>\n

Running the test with following options:
\nNumber of threads: 1<\/p>\n

Doing mutex performance test
\nThreads started!
\nDone.
\nTest execution summary:
\ntotal time: 0.0284s
\ntotal number of events: 1
\ntotal time taken by event execution: 0.0279<\/strong>
\nper-request statistics:
\nmin: 27.93ms
\navg: 27.93ms
\nmax: 27.93ms
\napprox. 95 percentile: 10000000.00ms<\/p>\n

Threads fairness:
\nevents (avg\/stddev): 1.0000\/0.00
\nexecution time (avg\/stddev): 0.0279<\/strong>\/0.00<\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n
<\/td>\nAMDA8 localhost core<\/strong><\/td>\nDell 64 bit dual core<\/strong><\/td>\nHP Pav 64 bit dual\u00a0<\/strong><\/td>\nHP Pav 32 bit mono<\/strong><\/td>\n<\/tr>\n
\u00a0Memory DRAM<\/td>\n\u00a08GB<\/td>\n\u00a06GB<\/td>\n\u00a04GB<\/td>\n\u00a01GB<\/td>\n<\/tr>\n
reads ratio times slower<\/p>\n

write\u00a0ratio times slower<\/td>\n

0.0066\/<\/strong>0.0066 = 1<\/strong><\/span><\/p>\n

0.008\/<\/strong>0.008 = 1\u00a0<\/strong><\/span><\/td>\n

0.0103\/<\/strong>0.0066 =\u00a01.56<\/strong><\/span><\/p>\n

0.0111\/<\/strong>0.008 =\u00a01.39<\/strong><\/span><\/td>\n

0.0112<\/strong>\/0.0066 = 1.7<\/strong><\/span><\/p>\n

0.0126\/0.008 = 1.6<\/strong><\/span><\/td>\n

0.0126\/0.0066 =\u00a01.9<\/strong><\/span><\/p>\n

0.028\/<\/strong>0.008 = 3.5\u00a0<\/strong><\/span><\/td>\n<\/tr>\n

<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n
Added 4\/10\/16<\/strong><\/span><\/td>\nHP \u00a0Intel Pent Dual<\/strong><\/span><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
\u00a0Memory DRAM<\/strong><\/td>\n\u00a02GB<\/span><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
reads ratio times slower<\/p>\n

write\u00a0ratio times slower<\/span><\/td>\n

0.0056\/0.0064 =\u00a01.143<\/span><\/strong><\/p>\n

 <\/p>\n

0.0084\/0.0088 =\u00a00.95<\/span><\/strong><\/td>\n

<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Again, the added HP Intel Dual is slightly faster than the localhost core for write time!<\/p>\n

Some read ratios compared to the localhost core are slower than writes and vice-versa here.<\/p>\n

The 32 bit Celeron is up to 3.5 times slower in these memory tests.<\/p>\n

You can start to imagination the time accumulation for each area combining between compared systems - CPU, memory and Disk IO - making the overall impact of being many times slower for a worst case, from a user experience perspective, as for every clock tick of a CPU that goes by and effective work can not be done due to these combined latencies - let alone considering multiple processes across a whole OS - you can imagine\u00a0where the slowest bottlenecks for a given process affect the final results system wide.<\/p>\n

There is an interesting table on p20 of System Performance that shows lost time from a 3GHz processor's perspective\u00a0to human terms:\"cpulosttime.jpg\"<\/a><\/p>\n

Level 1 cache - 3 times slower than CPU<\/p>\n

Level 2 cache - 9 times slower than CPU<\/p>\n

Level 3 cache - 43 times slower than CPU<\/p>\n

This puts main memory in perspective to CPU cycles - 6 mins in human 1sec terms to CPU clock ticks - or 6 x 60 =<\/p>\n

Main memory - 360 times slower than CPU<\/p>\n

The sooner they build larger memory directly onto the CPU chip the better eh?<\/p>\n","protected":false},"excerpt":{"rendered":"

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stevee@AMDA8 ~ $ sudo sysbench --test=mutex --memory-oper=read run [sudo] password for stevee: sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Doing mutex performance test Threads started! Done. Test execution summary: total time: 0.0071s total number of events: 1 total time taken by event execution: 0.0066 per-request statistics: ...\u00a0 How Slow Can You Go? Sysbench Comparisons – Memory<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-4262","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"a3_pvc":{"activated":true,"total_views":2,"today_views":0},"_links":{"self":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts\/4262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/comments?post=4262"}],"version-history":[{"count":0,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts\/4262\/revisions"}],"wp:attachment":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/media?parent=4262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/categories?post=4262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/tags?post=4262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}