TX PIO feature from Solarflare network card
I experimenting the Solarflare NIC feature called TX PIO. my understand is PIO transport data through CPU, DMA bypassed CPU by direct communication between devices. What is the different between the tranditional PIO, and Solarflare's TX PIO?
PIO (programmed input/output) describes the process whereby data is
directly transferred by the CPU to or from an I/O device. It is an
alternative to bus master DMA techniques where data are transferred
without CPU involvement. Solarflare 7000 series adapters support TX
PIO, where packet s on the transmit path can be “pushed” to the
adapter directly by the CPU. This improves the latency of
transmitted packets but can cause a very small increase in CPU
utilisation. TX PIO is therefore especially useful for smaller
packets.
network-adapter
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
add a comment |
I experimenting the Solarflare NIC feature called TX PIO. my understand is PIO transport data through CPU, DMA bypassed CPU by direct communication between devices. What is the different between the tranditional PIO, and Solarflare's TX PIO?
PIO (programmed input/output) describes the process whereby data is
directly transferred by the CPU to or from an I/O device. It is an
alternative to bus master DMA techniques where data are transferred
without CPU involvement. Solarflare 7000 series adapters support TX
PIO, where packet s on the transmit path can be “pushed” to the
adapter directly by the CPU. This improves the latency of
transmitted packets but can cause a very small increase in CPU
utilisation. TX PIO is therefore especially useful for smaller
packets.
network-adapter
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24
add a comment |
I experimenting the Solarflare NIC feature called TX PIO. my understand is PIO transport data through CPU, DMA bypassed CPU by direct communication between devices. What is the different between the tranditional PIO, and Solarflare's TX PIO?
PIO (programmed input/output) describes the process whereby data is
directly transferred by the CPU to or from an I/O device. It is an
alternative to bus master DMA techniques where data are transferred
without CPU involvement. Solarflare 7000 series adapters support TX
PIO, where packet s on the transmit path can be “pushed” to the
adapter directly by the CPU. This improves the latency of
transmitted packets but can cause a very small increase in CPU
utilisation. TX PIO is therefore especially useful for smaller
packets.
network-adapter
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
I experimenting the Solarflare NIC feature called TX PIO. my understand is PIO transport data through CPU, DMA bypassed CPU by direct communication between devices. What is the different between the tranditional PIO, and Solarflare's TX PIO?
PIO (programmed input/output) describes the process whereby data is
directly transferred by the CPU to or from an I/O device. It is an
alternative to bus master DMA techniques where data are transferred
without CPU involvement. Solarflare 7000 series adapters support TX
PIO, where packet s on the transmit path can be “pushed” to the
adapter directly by the CPU. This improves the latency of
transmitted packets but can cause a very small increase in CPU
utilisation. TX PIO is therefore especially useful for smaller
packets.
network-adapter
network-adapter
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
asked Jan 2 at 6:48
Bryan FokBryan Fok
1112
1112
Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24
add a comment |
Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24
Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24
add a comment |
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Your questions answers itself. TX is Transmit. So TX PIO is transmit PIO and not receive (RX) PIO.
– DavidPostill♦
Jan 2 at 8:51
so what make it faster than the tranditional PIO, and DMA?
– Bryan Fok
Jan 3 at 1:24