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correction for fio's kilobyte vs kibibyte for disk speeds (#120)

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Mason Rowe
2026-07-03 20:59:50 -04:00
parent 97b5ec226f
commit 3125fedff1
1 changed files with 18 additions and 15 deletions
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33
yabs.sh
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@@ -1,7 +1,7 @@
#!/bin/bash #!/bin/bash
# Yet Another Bench Script by Mason Rowe # Yet Another Bench Script by Mason Rowe
# Initial Oct 2019; Last update May 2026 # Initial Oct 2019; Last update Jul 2026
# Disclaimer: This project is a work in progress. Any errors or suggestions should be # Disclaimer: This project is a work in progress. Any errors or suggestions should be
# relayed to me via the GitHub project page linked below. # relayed to me via the GitHub project page linked below.
@@ -12,7 +12,7 @@
# performance via fio. The script is designed to not require any dependencies # performance via fio. The script is designed to not require any dependencies
# - either compiled or installed - nor admin privileges to run. # - either compiled or installed - nor admin privileges to run.
YABS_VERSION="v2026-05-19" YABS_VERSION="v2026-07-03"
echo -e '# ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## #' echo -e '# ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## #'
echo -e '# Yet-Another-Bench-Script #' echo -e '# Yet-Another-Bench-Script #'
@@ -383,16 +383,18 @@ function catch_abort() {
# format_speed # format_speed
# Purpose: This method is a convenience function to format the output of the fio disk tests which # Purpose: This method is a convenience function to format the output of the fio disk tests which
# always returns a result in KB/s. If result is >= 1 GB/s, use GB/s. If result is < 1 GB/s # always returns a result in KiB/s (fio terse v3 bandwidth fields are always KiB/s regardless
# and >= 1 MB/s, then use MB/s. Otherwise, use KB/s. # of --kb_base setting). Converts KiB/s to decimal units (KB/s, MB/s, GB/s) for display.
# Conversion: multiply KiB/s by 1024 to get bytes/s, then divide by 1000, 1000000, or
# 1000000000 to get KB/s, MB/s, or GB/s respectively.
# Thresholds (in KiB/s): >= 976563 -> GB/s, >= 977 -> MB/s, otherwise -> KB/s
# Parameters: # Parameters:
# 1. RAW - the raw disk speed result (in KB/s) # 1. RAW - the raw disk speed result (in KiB/s)
# Returns: # Returns:
# Formatted disk speed in GB/s, MB/s, or KB/s # Formatted disk speed in GB/s, MB/s, or KB/s
function format_speed { function format_speed {
RAW=$1 # disk speed in KB/s RAW=$1 # disk speed in KiB/s
RESULT=$RAW RESULT=$RAW
local DENOM=1
local UNIT="KB/s" local UNIT="KB/s"
# ensure raw value is not null, if it is, return blank # ensure raw value is not null, if it is, return blank
@@ -401,18 +403,19 @@ function format_speed {
return 0 return 0
fi fi
# check if disk speed >= 1 GB/s # check if disk speed >= 1 GB/s (976563 KiB/s = 1,000,000,000 bytes/s)
if [ "$RAW" -ge 1000000 ]; then if [ "$RAW" -ge 976563 ]; then
DENOM=1000000
UNIT="GB/s" UNIT="GB/s"
# check if disk speed < 1 GB/s && >= 1 MB/s RESULT=$(awk -v a="$RAW" 'BEGIN { print a * 1024 / 1000000000 }')
elif [ "$RAW" -ge 1000 ]; then # check if disk speed >= 1 MB/s (977 KiB/s ~ 1,000,000 bytes/s)
DENOM=1000 elif [ "$RAW" -ge 977 ]; then
UNIT="MB/s" UNIT="MB/s"
RESULT=$(awk -v a="$RAW" 'BEGIN { print a * 1024 / 1000000 }')
else
# convert KiB/s to KB/s (multiply by 1.024)
RESULT=$(awk -v a="$RAW" 'BEGIN { print a * 1024 / 1000 }')
fi fi
# divide the raw result to get the corresponding formatted result (based on determined unit)
RESULT=$(awk -v a="$RESULT" -v b="$DENOM" 'BEGIN { print a / b }')
# shorten the formatted result to two decimal places (i.e. x.xx) # shorten the formatted result to two decimal places (i.e. x.xx)
RESULT=$(echo "$RESULT" | awk -F. '{ printf "%0.2f",$1"."substr($2,1,2) }') RESULT=$(echo "$RESULT" | awk -F. '{ printf "%0.2f",$1"."substr($2,1,2) }')
# concat formatted result value with units and return result # concat formatted result value with units and return result