Search found 11 matches

by katsura
Sun Feb 16, 2020 11:25 pm
Forum: AmorphousMemoryMark
Topic: Examples
Replies: 0
Views: 8572

Examples

LPDDR4X 3733 MHz on 2-channel (max bandwidth 58.3 GB/s) MacBookAir9,1 (Scissor 2020): TBD DDR4 ECC 2666 or 2933 MHz on 6-channel MacPro7,1 (2019): TBD DDR4 2667 MHz 16GB x 2 on Macmini8,1 (Late 2018): http://katsurashareware.com/img/amm/DDR4-2667-Micron-16ATF2G64HZ-2G6E3-2x16GB.png DDR4 2400 MHz 8GB...
by katsura
Wed Feb 12, 2020 10:00 pm
Forum: AmorphousDiskMark
Topic: FAQ: inconsistent random 4K write speed results
Replies: 0
Views: 7264

FAQ: inconsistent random 4K write speed results

FAQ: inconsistent random 4K write speed results The five-second measurement duration time limit was added to ADM2.5 in order to avoid the impractically lengthy 4K read/write measurement time (many minutes and hours) on inherently slow hard drives, to avoid unnecessary writes on SSDs, and to be consi...
by katsura
Thu Jan 30, 2020 8:04 am
Forum: AmorphousMemoryMark
Topic: Technical Details
Replies: 0
Views: 9686

Technical Details

memmove()/bzero() measurements represent how well the OS (C library) optimized memmove()/bzero() functions for different CPU architectures. rep movsb/stosb measurements represent how well the ERMS feature is implemented on different CPU architectures. temporal load/store measurements represent how ...
by katsura
Tue Jan 28, 2020 12:49 am
Forum: AmorphousMemoryMark
Topic: Memory Performance Tips
Replies: 0
Views: 10426

Memory Performance Tips

Memory Performance Tips Use all available channels. If you have a Mac with a two-channel memory controller, use at least two memory modules so that two channels actually get utilized. Wikipedia: Multi-channel memory architecture. Use the fastest supported memory clock modules. If you have memory mod...
by katsura
Thu Jan 23, 2020 2:35 am
Forum: AmorphousMemoryMark
Topic: FAQ
Replies: 0
Views: 14369

FAQ

Q: Is there a non-Mac App Store version of AmorphousMemoryMark? A: No. AmorphousMemoryMark is only available on Mac App Store. https://apps.apple.com/app/amorphousmemorymark/id1495719766 Q: Why is the app icon so ugly? A: I wish I could draw, paint, design app icons, and more. I will replace it with...
by katsura
Thu Dec 26, 2019 6:15 pm
Forum: AmorphousDiskMark
Topic: CAUTION: INTENSE READ/WRITE ACCESS DURING MEASUREMENT MAY TRIGGER A DEVICE FAILURE.
Replies: 0
Views: 18208

CAUTION: INTENSE READ/WRITE ACCESS DURING MEASUREMENT MAY TRIGGER A DEVICE FAILURE.

=== DISCLAIMER === CAUTION: INTENSE READ/WRITE ACCESS DURING MEASUREMENT MAY TRIGGER A DEVICE FAILURE. https://apple.stackexchange.com/questions/84907/can-hard-drive-benchmark-apps-damage-your-hard-drive Keep in mind that it would be nothing but a coincidence if it would fail during the benchmark. h...
by katsura
Wed Oct 23, 2019 11:40 pm
Forum: AmorphousDiskMark
Topic: FAQ: how come write is faster than read?
Replies: 0
Views: 27700

FAQ: how come write is faster than read?

i'm guessing the write cache on the storage device is contributing to this behavior. to be confirmed... fio exhibits the same issue. APPLE SSD SM0512F: Read: 26.8MB/s Write: 102MB/s $ fio --name=test --ioengine=posixaio --direct=1 --gtod_reduce=1 --bs=4k --iodepth=1 --size=500M --readwrite=randread ...
by katsura
Tue Aug 20, 2019 9:47 pm
Forum: AmorphousDiskMark
Topic: FAQ: unexpectedly slow performance
Replies: 0
Views: 39733

FAQ: unexpectedly slow performance

if other process uses the disk while you measure the disk performance, you get slower than expected performance. Time Machine : make sure Time Machine is not backing up (accessing the storage device). this usually happens every hour if you have Time Machine enabled. you can check the Time Machine me...
by katsura
Mon Mar 05, 2018 4:48 pm
Forum: ProPhase/ProLevel
Topic: Soundflower (free audio routing software)
Replies: 1
Views: 16886

Re: Soundflower (free audio routing software)

https://github.com/mattingalls/Soundflower/releases/ " The SoundflowerBed app is retired. A new replacement is in the works. In the meantime, you can take your chances with an older version of Soundflowerbed, but you can do a lot with a Multi-Output Aggregate Device . Here's an example: Say i want t...
by katsura
Thu Dec 28, 2017 11:58 pm
Forum: AmorphousDiskMark
Topic: You may need to disable your antivirus software
Replies: 0
Views: 68010

You may need to disable your antivirus software

some antivirus software may cache files on memory which causes the AmorphousDiskMark measurement to be inaccurate/useless. please try disabling your antivirus software to see if it helps the measurement result to be more reasonable or within a range of something you would expect from your storage de...