Page History

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Disk performance

Using netcat to transfer a 5 gb file from one VM to another VM

ubuntu@ip-10-73-143-203:~$ time sudo bash -c "(nc -w 3 ec2-50-17-13-245.compute-1.amazonaws.com 1234 < /mnt/bf)"

real 2m56.656s
user 0m1.612s
sys 0m15.088s

the throughput was 5000mb/176sec = 28.04 mb/s

hdd performance

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Use dd to write bytes to disk:

$ sync; sudo time bash -c "(dd if=/dev/zero of=

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tmp.dat bs=8k count=500000; sync)"

500000+0 records in
500000+0 records out
4096000000 bytes (4.1 GB) copied, 34.3706 s, 119 MB/s

Network performance

Use netcat to transfer a 4GB file from one VM to another VM:

On the client, run netcat listener:

$ nc -l 1234 > tmp.dat

On the server, send a 4GB file to client:

$ sudo time bash -c "(nc -w 3 server.host.name 1234 < tmp.dat)"

real 2m56.656s
user 0m1.612s
sys 0m15.088s

the throughput was 4000mb/176sec = 22.73 MB/s

CPU

Linux

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CPU info is in the virtual file /proc/cpuinfo:

$ cat /proc/cpuinfo

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processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
stepping : 7
microcode : 0x70d
cpu MHz : 1795.672
cache size : 20480 KB
physical id : 1
siblings : 2
core id : 2
cpu cores : 1
apicid : 36
initial apicid : 36
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm arat epb xsaveopt pln pts dtherm
bogomips : 3591.34
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
stepping : 7
microcode : 0x70d
cpu MHz : 1795.672
cache size : 20480 KB
physical id : 1
siblings : 2
core id : 2
cpu cores : 1
apicid : 36
initial apicid : 36
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm arat epb xsaveopt pln pts dtherm
bogomips : 3591.34
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
Memory
$ free
       total          used    free shared buffers  cached
Mem: 8014548       6649104 1365444      0  999756 3663824
-/+ buffers/cache: 1985524 6029024
Swap: 262136         27172  234964
MacOSX
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List CPU info with:
$ system_profiler SPHardwareDataType
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Hardware:
    Hardware Overview:
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