-Enabling Extended Tag and Setting Max Read Request Size
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-PCI configurations of extended_tag and max _read_requ st_size have big impacts on performance of small packets on 40G NIC.
-Enabling extended_tag and setting max _read_requ st_size to small size such as 128 bytes provide great helps to high performance of small packets.
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-* These can be done in some BIOS implementations.
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-* For other BIOS implementations, PCI configurations can be changed by using command of setpci, or special configurations in DPDK config file of common_linux.
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- * Bits 7:5 at address of 0xA8 of each PCI device is used for setting the max_read_request_size,
- and bit 8 of 0xA8 of each PCI device is used for enabling/disabling the extended_tag.
- lspci and setpci can be used to read the values of 0xA8 and then write it back after being changed.
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- * In config file of common_linux, below three configurations can be changed for the same purpose.
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- CONFIG_RTE_PCI_CONFIG
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- CONFIG_RTE_PCI_EXTENDED_TAG
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- CONFIG_RTE_PCI_MAX_READ_REQUEST_SIZE
+As there might be firmware fixes for performance enhancement in latest version
+of firmware image, the firmware update might be needed for getting high performance.
+Check with the local Intel's Network Division application engineers for firmware updates.
+Users should consult the release notes specific to a DPDK release to identify
+the validated firmware version for a NIC using the i40e driver.