Month: November 2020

Apple M1 Chip CPU and GPU Benchmark Results

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I received my 2020 mac mini today (US$ 699). Since this is the first product with Apple M1 chip CPU, I am curious to find out its performance. I ran some tests using benchmark apps including Blackmagic and Cinebench.

This Apple M1 chip is 8 cores and 8 threads. FYI, Apple said it has 25000 concurrent threads, it means the CPU can execute 25k jobs at the same time. Its like a kitchen with 8 chefs working on 25k orders. It doesn’t mean there are 25k chefs in the kitchen.

Here are the specification of this CPU (Source):

  • 8-core CPU with 4 performance cores and 4 efficiency cores
  • 8-core GPU (A nVidia GPU such as the one in GeForce RTX 2060 has 1920 cores)
  • 16-core Neural Engine

Testing Multi Core Performance of Apple M1 Chip Using Cinebench R23

Testing Single Core Performance of Apple M1 Chip Using Cinebench R23

Testing CPU and GPU Performance of Apple M1 Chip Using GeekBench 5

Results:

Testing Machine Learning Performance Using MLBenchy

Here is the result:

InceptionV3 Run Time: 1434ms
Nudity Run Time: 393ms
Resnet50  Run Time:1364ms
Car Recognition  Run Time:473ms
GoogleNetPlace  Run Time:410ms
GenderNet Run Time: 597ms
TinyYolo Run Time: 806ms

InceptionV3 Run Time: 121ms
Nudity Run Time: 83ms
Resnet50  Run Time:72ms
Car Recognition  Run Time:114ms
GoogleNetPlace  Run Time:111ms
GenderNet Run Time: 86ms
TinyYolo Run Time: 146ms

InceptionV3 Run Time: 91ms
Nudity Run Time: 76ms
Resnet50  Run Time:136ms
Car Recognition  Run Time:72ms
GoogleNetPlace  Run Time:147ms
GenderNet Run Time: 87ms
TinyYolo Run Time: 72ms


 
Done running the 3 iterations of the benchmark

And finally, if you are curious about the SSD performance of the mac mini…

Testing Disk Performance of Mac Mini SSD Using Blackmagic Speed Test

I am quite surprise about its overall performance. The single core performance of Apple M1 chip is better than Intel i9-9880 and i7-1165. It will be quite useful if I need to perform some non-parallel computations. The multiple core performance of Apple M1 is quite impressive too. If you take a look to the result, you will notice that most of the CPUs that have better scores have more cores and threads. I really don’t expect a $700 computer that can beat the CPU that costs a thousand dollars or more.

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[ZFS]How to repair a ZFS pool if one device was damaged

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Today, I accidentally dd’ed a disk which was part of an active ZFS pool on my test server. I dd’ed the first and the last 10 sectors of the disk. Technically I didn’t lose any data because my ZFS configuration was RAIDZ. However once I rebooted my computer, my ZFS complained:

#This is what I did:
sudo dd if=/dev/zero of=/dev/sda bs=512 count=10
sudo dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 4096 )) count=1M

sudo zpool status
  pool: storage
 state: DEGRADED
status: One or more devices could not be used because the label is missing or
        invalid.  Sufficient replicas exist for the pool to continue
        functioning in a degraded state.
action: Replace the device using 'zpool replace'.
   see: http://zfsonlinux.org/msg/ZFS-8000-4J
  scan: resilvered 2.40T in 1 days 00:16:34 with 0 errors on Fri Nov 13 20:05:53 2020
config:

        NAME                                 STATE     READ WRITE CKSUM
        storage                              DEGRADED     0     0     0
          raidz1-0                           DEGRADED     0     0     0
            ata-ST4000DM000-1F2168_S30076XX  ONLINE       0     0     0
            ata-ST4000DX001-1CE168_Z3019CXX  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0S9YY  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXZZ  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXDD  ONLINE       0     0     0
            412403026512446213               UNAVAIL      0     0     0  was /dev/disk/by-id/ata-ST4000NM0033-9ZM170                                                                                                                         _Z1Z3RR74-part1

So I checked the problematic device, and I see the problem:

ls /dev/disk/by-id/

#This is normal disk:
lrwxrwxrwx 1 root root  10 Nov 13 20:58 ata-ST4000DX001-1CE168_Z3019CXX-part1 -> ../../sdd1
lrwxrwxrwx 1 root root  10 Nov 13 20:58 ata-ST4000DX001-1CE168_Z3019CXX-part9 -> ../../sdd9


#This is the problematic disk, part1 and part9 are missing.
lrwxrwxrwx 1 root root   9 Nov 13 20:58 ata-ST4000NM0033-9ZM170_Z1Z3RR74 -> ../../sdf

It is pretty easy to fix this problem. All you need is to bring the device offline and bring it back.

#First, offline the problematic device:
sudo zpool offline storage 412403026512446213

sudo zpool status
  pool: storage
 state: DEGRADED
status: One or more devices could not be used because the label is missing or
        invalid.  Sufficient replicas exist for the pool to continue
        functioning in a degraded state.
action: Replace the device using 'zpool replace'.
   see: http://zfsonlinux.org/msg/ZFS-8000-4J
  scan: resilvered 2.40T in 1 days 00:16:34 with 0 errors on Fri Nov 13 20:05:53 2020
config:

        NAME                                 STATE     READ WRITE CKSUM
        storage                              DEGRADED     0     0     0
          raidz1-0                           DEGRADED     0     0     0
            ata-ST4000DM000-1F2168_S30076XX  ONLINE       0     0     0
            ata-ST4000DX001-1CE168_Z3019CXX  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0S9YY  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXZZ  ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXDD  ONLINE       0     0     0
            412403026512446213               OFFLINE      0     0     0

#Then bring back the device:
sudo zpool online ata-ST4000NM0033-9ZM170_Z1Z3RR74 

#Resilver it
sudo zpool scrub storage

sudo zpool status
  pool: storage
 state: ONLINE
  scan: resilvered 36K in 0 days 00:00:01 with 0 errors on Fri Nov 13 21:03:01 2020
config:

        NAME                                  STATE     READ WRITE CKSUM
        storage                               ONLINE       0     0     0
          raidz1-0                            ONLINE       0     0     0
            ata-ST4000DM000-1F2168_S30076XX   ONLINE       0     0     0
            ata-ST4000DX001-1CE168_Z3019CXX   ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0S9YY   ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXZZ   ONLINE       0     0     0
            ata-ST4000DM000-2AE166_WDH0SXDD   ONLINE       0     0     0
            ata-ST4000NM0033-9ZM170_Z1Z3RR74  ONLINE       0     0     0

errors: No known data errors

That’s it.

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