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| author |   Gerhard Engleder <gerhard@engleder-embedded.com> | 2022-11-30 20:37:07 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-12-02 10:47:49 +0000 |
| commit | d3dfe8d6c04061a3eadfc299ba8009b38f4bc25b (patch) | |
| tree | 4b65cbe25da50111fd0ce743ecae599bffd3abaf /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | tsnep: Add ethtool::get_channels support (diff) | |
| download | wireguard-linux-d3dfe8d6c04061a3eadfc299ba8009b38f4bc25b.tar.xz wireguard-linux-d3dfe8d6c04061a3eadfc299ba8009b38f4bc25b.zip | |
tsnep: Throttle interrupts
Without interrupt throttling, iperf server mode generates a CPU load of
100% (A53 1.2GHz). Also the throughput suffers with less than 900Mbit/s
on a 1Gbit/s link. The reason is a high interrupt load with interrupts
every ~20us.
Reduce interrupt load by throttling of interrupts. Interrupt delay
default is 64us. For iperf server mode the CPU load is significantly
reduced to ~20% and the throughput reaches the maximum of 941MBit/s.
Interrupts are generated every ~140us.
RX and TX coalesce can be configured with ethtool. RX coalesce has
priority over TX coalesce if the same interrupt is used.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
0 files changed, 0 insertions, 0 deletions