[v3] igb: Implement Transmit Rate Limiting (TRL)

[PATCH v3 0/7] igb: Implement Transmit Rate Limiting (TRL)

Josh Hilke posted 7 patches 1 month, 1 week ago

Diff against v1 v2 v4 v5 v6 v7 v8
Download series mbox

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git fetch https://github.com/patchew-project/qemu tags/patchew/20260612-igb-trl-v3-0-19607f9a3dde@google.com

Maintainers: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>, Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>, Jason Wang <jasowang@redhat.com>, Fabiano Rosas <farosas@suse.de>, Laurent Vivier <lvivier@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>

There is a newer version of this series

hw/net/igb.c           |  43 ++++++++++
hw/net/igb_common.h    |   1 +
hw/net/igb_core.c      | 155 ++++++++++++++++++++++++++++++++++--
hw/net/igb_core.h      |  12 +++
hw/net/igb_regs.h      |  11 +++
tests/qtest/igb-test.c | 209 +++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 426 insertions(+), 5 deletions(-)

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[PATCH v3 0/7] igb: Implement Transmit Rate Limiting (TRL)

Posted by Josh Hilke 1 month, 1 week ago

This is v3 of a patch series implementing the Transmit Rate Limiter (TRL) feature for
the Intel 82576 (igb) network device emulation in QEMU.

v2: https://lists.gnu.org/archive/html/qemu-devel/2026-06/msg02879.html

Changelog:

v3:
  - Remove redundant target_rate state and recalculate it dynamically from trlrc.
  - Flush the transmit ring when TRL is disabled while a queue is throttled to prevent packet stall.
  - Remove redundant updates to core->mac[TRLRC] since reads are multiplexed.

Signed-off-by: Josh Hilke <jrhilke@google.com>
---
Josh Hilke (7):
      igb: Define TRL registers and core state
      igb: Add VMState support for TRL state
      igb: Implement TRL register write and configuration
      igb: Refactor TX path to return processed byte count
      igb: Implement TRL throttling and timer resumption
      igb: Add QTest for Transmit Rate Limiter register multiplexing
      igb: Add QTest for Transmit Rate Limiter traffic throttling

 hw/net/igb.c           |  43 ++++++++++
 hw/net/igb_common.h    |   1 +
 hw/net/igb_core.c      | 155 ++++++++++++++++++++++++++++++++++--
 hw/net/igb_core.h      |  12 +++
 hw/net/igb_regs.h      |  11 +++
 tests/qtest/igb-test.c | 209 +++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 426 insertions(+), 5 deletions(-)
---
base-commit: 98b060da3a4f92b2a994ead5b16a87e783baf77c
change-id: 20260608-igb-trl-19be198da6f2

Best regards,
-- 
Josh Hilke <jrhilke@google.com>