Samsung SSD 850 EVO 500GB

Samsung SSD 850 EVO 500GB

ATA device, with non-removable media
	Model Number:       Samsung SSD 850 EVO 500GB               
	Serial Number:      S2RBNX0H816480M     
	Firmware Revision:  EMT02B6Q
	Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
=========================================================================================================
root@server:~# cat /proc/cpuinfo
processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 16
model		: 6
model name	: AMD Athlon(tm) II X2 250 Processor
stepping	: 3
microcode	: 0x10000c8
cpu MHz		: 800.000
cache size	: 1024 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate vmmcall npt lbrv svm_lock nrip_save
bugs		: tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
bogomips	: 6000.35
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor	: 1
vendor_id	: AuthenticAMD
cpu family	: 16
model		: 6
model name	: AMD Athlon(tm) II X2 250 Processor
stepping	: 3
microcode	: 0x10000c8
cpu MHz		: 800.000
cache size	: 1024 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate vmmcall npt lbrv svm_lock nrip_save
bugs		: tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
bogomips	: 6000.35
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate
=========================================================================================================
root@server:~# fio -name=iops -rw=randread -bs=4k -size=1G -iodepth=1 -directory=/usr/ssi14/fiotest -ioengine libaio
iops: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=1
fio-2.2.10
Starting 1 process
iops: Laying out IO file(s) (1 file(s) / 1024MB)
Jobs: 1 (f=1): [r(1)] [100.0% done] [19588KB/0KB/0KB /s] [4897/0/0 iops] [eta 00m:00s]
iops: (groupid=0, jobs=1): err= 0: pid=3610: Tue Mar 21 13:18:06 2017
  read : io=1024.0MB, bw=19265KB/s, iops=4816, runt= 54428msec
    slat (usec): min=49, max=5743, avg=192.33, stdev=29.68
    clat (usec): min=0, max=1434, avg= 4.29, stdev= 3.48
     lat (usec): min=50, max=5748, avg=198.21, stdev=30.70
    clat percentiles (usec):
     |  1.00th=[    1],  5.00th=[    3], 10.00th=[    3], 20.00th=[    4],
     | 30.00th=[    4], 40.00th=[    4], 50.00th=[    4], 60.00th=[    4],
     | 70.00th=[    5], 80.00th=[    5], 90.00th=[    5], 95.00th=[    6],
     | 99.00th=[    7], 99.50th=[    7], 99.90th=[   33], 99.95th=[   51],
     | 99.99th=[   79]
    bw (KB  /s): min=17936, max=20456, per=100.00%, avg=19267.48, stdev=558.44
    lat (usec) : 2=1.93%, 4=12.43%, 10=85.40%, 20=0.08%, 50=0.10%
    lat (usec) : 100=0.06%, 250=0.01%
    lat (msec) : 2=0.01%
  cpu          : usr=8.79%, sys=28.03%, ctx=265310, majf=0, minf=9
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=262144/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: io=1024.0MB, aggrb=19265KB/s, minb=19265KB/s, maxb=19265KB/s, mint=54428msec, maxt=54428msec

Disk stats (read/write):
  sda: ios=261256/28, merge=0/20, ticks=34280/0, in_queue=33960, util=62.56%
=========================================================================================================
root@server:~# fio -name=iops -rw=randread -bs=4k -size=1G -iodepth=1 -directory=/usr/ssi14/fiotest
iops: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.2.10
Starting 1 process
iops: Laying out IO file(s) (1 file(s) / 1024MB)
Jobs: 1 (f=1): [r(1)] [100.0% done] [19832KB/0KB/0KB /s] [4958/0/0 iops] [eta 00m:00s]
iops: (groupid=0, jobs=1): err= 0: pid=3884: Tue Mar 21 13:26:24 2017
  read : io=1024.0MB, bw=19883KB/s, iops=4970, runt= 52738msec
    clat (usec): min=48, max=5910, avg=188.24, stdev=36.28
     lat (usec): min=48, max=5910, avg=189.02, stdev=36.34
    clat percentiles (usec):
     |  1.00th=[  147],  5.00th=[  163], 10.00th=[  171], 20.00th=[  177],
     | 30.00th=[  183], 40.00th=[  185], 50.00th=[  187], 60.00th=[  187],
     | 70.00th=[  189], 80.00th=[  199], 90.00th=[  209], 95.00th=[  223],
     | 99.00th=[  243], 99.50th=[  258], 99.90th=[  314], 99.95th=[  442],
     | 99.99th=[ 1512]
    bw (KB  /s): min=19168, max=20728, per=100.00%, avg=19886.93, stdev=304.67
    lat (usec) : 50=0.01%, 100=0.01%, 250=99.31%, 500=0.64%, 750=0.01%
    lat (usec) : 1000=0.01%
    lat (msec) : 2=0.02%, 4=0.01%, 10=0.01%
  cpu          : usr=9.77%, sys=34.45%, ctx=265876, majf=0, minf=8
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=262144/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: io=1024.0MB, aggrb=19882KB/s, minb=19882KB/s, maxb=19882KB/s, mint=52738msec, maxt=52738msec

Disk stats (read/write):
  sda: ios=261836/27, merge=0/20, ticks=28248/0, in_queue=27928, util=52.96%
=========================================================================================================  
root@server:~# hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   3470 MB in  2.00 seconds = 1735.20 MB/sec
 Timing buffered disk reads: 792 MB in  3.00 seconds = 263.83 MB/sec
root@server:~# hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   4424 MB in  2.00 seconds = 2212.45 MB/sec
 Timing buffered disk reads: 792 MB in  3.00 seconds = 263.91 MB/sec