• Comprehensive README documenting Iozone benchmark wrapper
• Details command-line options, test modes, and features
• Explains workflow, dependencies, and output files
• Includes usage examples and troubleshooting guide

Complete Iozone wrapper documentation with examples

• Created comprehensive 365-line documentation for Iozone benchmark wrapper
• Documents all command-line options with defaults and descriptions
• Explains 12-step workflow from environment setup to result verification
• Includes 11 usage examples covering basic to advanced scenarios
• Details memory sizing calculations, output files, and architecture support
• Provides troubleshooting guide and notes on kernel tuning comparison

README.md

Description

README documents --eatmem_free_memory, but iozone_run.sh does not register it as a valid getopt
long option, so the argument is treated as invalid and the configured free-memory target is never
applied.

Code

README.md[R36-41]

+  --eatmem: Use the eatmem program to reduce available memory for out-of-cache testing.
+  --eatmem_out_of_cache_start <MB>: Starting memory consumption for eatmem (default: 128).
+  --eatmem_out_of_cache_end <MB>: Ending memory consumption for eatmem (default: 1024).
+  --eatmem_free_memory <MB>: Memory to keep free when using eatmem (default: 180).
+  --tunecompare: Compare default vs. tuned kernel parameters.
+  --swap: Disable swap during testing, re-enable after.

Evidence

The README advertises --eatmem_free_memory, but getopt is configured from ARGUMENT_LIST which
omits eatmem_free_memory, meaning the flag is not recognized as valid input. Even though there is
a case arm intended to handle --eatmem_free_memory, it will never be reached if getopt rejects
the option.

README.md[35-41]
iozone/iozone_run.sh[1527-1546]
iozone/iozone_run.sh[1602-1608]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`--eatmem_free_memory` is documented and has a handler, but it is not included in the getopt long-options list, so it is rejected/ignored and cannot be used.

### Issue Context
The script builds its accepted long options from `ARGUMENT_LIST`/`NO_ARGUMENTS`. `--eatmem_free_memory` must be present in `ARGUMENT_LIST` to be accepted.

### Fix Focus Areas
- iozone/iozone_run.sh[1527-1563]
- iozone/iozone_run.sh[1602-1608]

### Suggested change
Add `eatmem_free_memory` to `ARGUMENT_LIST` (and keep the existing `--eatmem_free_memory` case arm).

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

Description

README documents --page_size, but iozone_run.sh only handles --pagesize and assigns to
pagesize (not the page_size variable actually used), so the documented flag doesn’t change the
runtime behavior.

Code

README.md[R51-55]

+Iozone-Specific Options:
+  --iozone_kit <kit>: Iozone package to download (default: iozone3_490).
+  --auto: Use auto-mode testing instead of throughput mode.
+  --page_size <KB>: Minimum file size for auto-mode (default: 1024 KB).
+  --quick <factor>: Divisor for in-cache memory to speed up tests (default: 1).

Evidence

The README tells users to pass --page_size. The script’s getopt configuration includes
page_size, but the parsing switch only matches --pagesize and writes to pagesize, leaving the
real page_size unchanged.

README.md[51-56]
iozone/iozone_run.sh[1527-1546]
iozone/iozone_run.sh[1670-1672]
iozone/iozone_run.sh[93-93]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`--page_size` is documented and listed as a getopt long option, but the code only handles `--pagesize` and assigns to an unused variable, so the option cannot be set via the documented interface.

### Issue Context
`page_size` is used throughout the script to build iozone args, so the option handler must set `page_size`.

### Fix Focus Areas
- iozone/iozone_run.sh[1527-1546]
- iozone/iozone_run.sh[1666-1673]

### Suggested change
Change the case label to `--page_size)` (and/or support both `--page_size` and `--pagesize`) and assign `page_size=$2` (not `pagesize=$2`).

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

Description

README instructs downloading Iozone from an HTTP URL and the wrapper does the same, then
builds/installs it while running as root; this allows MITM tampering of the source archive and
potential code execution on the test system.

Code

README.md[146]

+Location of underlying workload: Downloaded from http://www.iozone.org/src/current/ (default: iozone3_490).

Evidence

The README explicitly points to an http:// source location, and the script downloads the kit via
plain HTTP before extracting/building it. The script enforces root execution, increasing the impact
of a tampered download.

README.md[146-146]
iozone/iozone_run.sh[447-458]
iozone/iozone_run.sh[1724-1726]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
The wrapper fetches and executes (build/installs) third-party source over plain HTTP while running as root, enabling network tampering.

### Issue Context
`retrieve_and_build_iozone()` downloads `${iozone_kit}.tar` via HTTP and then extracts/builds it.

### Fix Focus Areas
- iozone/iozone_run.sh[447-490]
- README.md[144-148]

### Suggested change
Use an integrity-protected approach: switch to HTTPS if available, and/or add checksum verification (e.g., hardcoded SHA256 per supported kit, or a detached signature flow) before extracting/building. Update the README to reflect the secured download/verification behavior.

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

Description

README documents --tools_git, but iozone_run.sh downloads test_tools before any wrapper option
parsing and never registers tools_git as an accepted long option, so users cannot override the
tools repository as described.

Code

README.md[R65-68]

+General test_tools options:
+  --tools_git <value>: Git repo to retrieve the required tools from.
+      Default: https://github.com/redhat-performance/test_tools-wrappers
+  --verbose: Enable verbose shell output (set -x).

Evidence

The script sets tools_git to a fixed default and immediately uses it to fetch test_tools before
sourcing general_setup or processing wrapper-specific options. The wrapper’s getopt option lists
also omit tools_git, so --tools_git cannot be passed through to affect behavior.

README.md[65-68]
iozone/iozone_run.sh[166-168]
iozone/iozone_run.sh[285-319]
iozone/iozone_run.sh[1527-1563]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`--tools_git` is documented, but the script installs `test_tools` before parsing wrapper args and doesn’t accept `tools_git` in getopt, so the documented override is ineffective.

### Issue Context
`attempt_tools_*` runs before `source ${TOOLS_BIN}/general_setup "$@"` and before wrapper getopt parsing.

### Fix Focus Areas
- iozone/iozone_run.sh[263-343]
- iozone/iozone_run.sh[1527-1563]

### Suggested change
Parse `--tools_git <url>` in the early preflight section (before `attempt_tools_wget/curl/git`) and set `tools_git` accordingly; optionally also add `tools_git` to the wrapper getopt list for consistency (even if it’s only used pre-install).

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools