Performance 用于测量mac os x上SD卡读/写速度的shell脚本
下面是一个小脚本,用于测量mac os x上SD卡(或U盘或其他磁盘)的速度。它非常原始,但易于使用和适应 这似乎不是一个问题。这似乎不是一个问题。Performance 用于测量mac os x上SD卡读/写速度的shell脚本,performance,macos,shell,console,usb,Performance,Macos,Shell,Console,Usb,下面是一个小脚本,用于测量mac os x上SD卡(或U盘或其他磁盘)的速度。它非常原始,但易于使用和适应 这似乎不是一个问题。这似乎不是一个问题。 #!/bin/bash # config SD_DIR=/Volumes/EOS_DIGITAL/ FILENAME=file_speed_test.deleteme SIZE=5 # in MB (mac os x) #create large file first echo "creating file" mkfile 100m $TMPDI
#!/bin/bash
# config
SD_DIR=/Volumes/EOS_DIGITAL/
FILENAME=file_speed_test.deleteme
SIZE=5 # in MB (mac os x)
#create large file first
echo "creating file"
mkfile 100m $TMPDIR$FILENAME
echo "done creating file"
# measure time at the beginning
echo "Starting to WRITE to SD"
START=$(date +%s)
cp $TMPDIR$FILENAME $SD_DIR
END=$(date +%s)
#calculate diff
DIFFw=$(( $END - $START ))
SPEEDw=$(echo $SIZE/$DIFFw | bc -l)
echo "It took $DIFFw seconds to write"
# delete file
rm $TMPDIR$FILENAME
# read speed
echo "Starting to READ from SD"
START=$(date +%s)
cp $SD_DIR$FILENAME $TMPDIR
END=$(date +%s)
rm $TMPDIR$FILENAME
rm $SD_DIR/$FILENAME
#calculate diff
DIFFr=$(( $END - $START ))
SPEEDr=$(echo $SIZE/$DIFFr | bc -l)
echo "It took $DIFFr seconds to read"
echo "---------- RESULTS ------------"
echo "It took $DIFFw seconds to write $SIZE MB --> WRITE Speed: $SPEEDw MB/s"
echo "It took $DIFFr seconds to read $SIZE MB --> READ Speed: $SPEEDr MB/s"