Tweak README with midctl notes

NOTES.md

@@ -132,9 +132,9 @@ Bottom line: your Optane and pool are fine and the SLOG is correctly carrying th
 
 Kernal tweaks
 
-In System → Advanced Settings → Kernel Arguments, add (then reboot):
+midclt call system.advanced.config
 
-intel_idle.max_cstate=1 processor.max_cstate=1 pcie_aspm=off nvme_core.default_ps_max_latency_us=0
+midclt call system.advanced.update '{"kernel_extra_options": "intel_idle.max_cstate=1 processor.max_cstate=1 pcie_aspm=off nvme_core.default_ps_max_latency_us=0"}'
 
 
 *_cstate=1 keeps the CPU responsive (kills the ~238 µs host overhead).

README.md

@@ -238,14 +238,21 @@ racadm jobqueue create BIOS.Setup.1-1
 # reboot to apply
 ```
 
-**2. Kernel parameters** (target PCIe/NVMe link power saving + residual C‑states). On TrueNAS: *System → Advanced Settings → Kernel Arguments*, then reboot:
-```
-intel_idle.max_cstate=1 processor.max_cstate=1 pcie_aspm=off nvme_core.default_ps_max_latency_us=0
+**2. Kernel parameters** (target PCIe/NVMe link power saving + residual C‑states).
+
+Use the TrueNAS `midctl` command to add custom Kernel Boot Arguments, then reboot
+
+```bash
+midclt call system.advanced.config
+
+midclt call system.advanced.update '{"kernel_extra_options": "intel_idle.max_cstate=1 processor.max_cstate=1 pcie_aspm=off nvme_core.default_ps_max_latency_us=0"}'
 ```
 
 **3. CPU governor → `performance`** *(the single biggest win)*:
 ```bash
+grep MHz /proc/cpuinfo | sort -u
 echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
+grep MHz /proc/cpuinfo | sort -u
 ```
 Make it persistent on TrueNAS — *System → Advanced Settings → Init/Shutdown Scripts*, add a **Post Init** *Command*:
 ```