Tomek, Are you sure you don't have a problem? I have a Samsung SSD 850 EVO 500GB and I'm getting Timing buffered disk reads: 1392 MB in 3.00 seconds = 463.56 MB/sec Timing buffered disk reads: 1396 MB in 3.00 seconds = 464.81 MB/sec Timing buffered disk reads: 1412 MB in 3.00 seconds = 470.39 MB/sec
and timing for cached reads: 8024 MB in 2.00 seconds = 4014.81 MB/sec for the cache. I'm using f2fs and this mother board is nothing special being AMD and of 2013 vintage it is 8 core though and has 16Gig of RAM. It's the same drive just bigger. Best, Colin On Monday, 26 December 2016 17:26:23 GMT Ben Bullard wrote: > I tried throughput-performance, desktop, and realtime and had same > problem with all. Then I tried disabling tuned.service and that worked > in that there are no longer drops or fluctuations in read speed under > hdparm over 10 hour time period. > > Ben Bullard > ben79 > -------------------- > OpenMandriva-QA Team > > On 12/25/2016 05:19 PM, Tomasz Paweł Gajc wrote: > > Dnia niedziela, 25 grudnia 2016 16:58:19 CET Ben Bullard pisze: > >> Drive in question: Model Family: Crucial/Micron > >> MX100/MX200/M5x0/M600 Client SSDs > >> > >> Device Model: Crucial_CT500MX200SSD4 > >> > >> Firmware Version: MU04 > >> > >> Ok, this problem isn't going away. TPG, Colin, Bero, or anyone what logs > >> or test/commands in addition to omv-bug-report.log do I need to include > >> for a bug report on this. > > Hard to say what may be the problem. > > Maybe it's related to aggresive APM on your SATA ports. > > > > tuned daemon may interfere here. > > > > take a look on: > > tuned-adm active > > > > then change to diffrent profile: > > > > tuned-adm profile throughput-performance > > > > and then run hdparm tests > > > >> There was a kernel-firmware (20161225) update > >> today I hoped would address this but it didn't. > > kernel-firmware has nothing to do with firmware with your disk. > > > > > > On my SSD Samsung EVO 840 on Lx 3.0 i got stable results: > > > > [root@lazur tpg]# hdparm -t /dev/sda > > > > /dev/sda: > > Timing buffered disk reads: 762 MB in 3.01 seconds = 253.56 MB/sec > > [root@lazur tpg]# hdparm -t /dev/sda > > > > /dev/sda: > > Timing buffered disk reads: 778 MB in 3.00 seconds = 259.29 MB/sec > > [root@lazur tpg]# hdparm -t /dev/sda > > > > /dev/sda: > > Timing buffered disk reads: 778 MB in 3.01 seconds = 258.63 MB/sec > > > > > > > > > > _______________________________________________ > > OM-Cooker mailing list > > [email protected] > > http://ml.openmandriva.org/mailman/listinfo/om-cooker_ml.openmandriva.org > _______________________________________________ OM-Cooker mailing list [email protected] http://ml.openmandriva.org/mailman/listinfo/om-cooker_ml.openmandriva.org
