what is the fastest speed that FPGA deals with CPU?

W

walala

Guest
Dear all,

Is PCI the only convinient interfacing unit that talks with CPU by inserting
something into a computer conviniently? What is the speed of that? Is there
any faster method?

Thanks a lot,

-Walala
 
"walala" <mizhael@yahoo.com> wrote in message news:<bq0jie$kv2$1@mozo.cc.purdue.edu>...
Dear all,

Is PCI the only convinient interfacing unit that talks with CPU by inserting
something into a computer conviniently? What is the speed of that? Is there
any faster method?
PCI is the only relatively fast interface that is available on almost
Click to expand...
any computer for internal extensions and has good operating system
support for hardware drivers. The usual 32-Bit, 33MHz PCI can provide
133MB/s in theory of which about 90MByte/s are usable without to much
effort for writes, considerably less for reads. There are also 66MHz
and/or 64-Bit variants available on more expensive mainboards.

But there are lots of alternatives.
There are faster "PCI-like" interfaces like AGP, PCI-X, PCI-Express
(only possible with some FPGAs).
You can also connect your hardware via ATA or SCSI busses. That's
about the speed of PCI. For data aquisition tasks you can make your
hardware look like a tape drive so that you do not need to write a
driver and readout software. Just use the tar command for that.

Probably the fastest interface inside a PC is a memory slot. But
getting OS support for your device in this case is not straight
forward. But there are a couple of GByte/s available there.

And then you can use all the external interfaces: FireWire, USB,
Ethernet, ...

Kolja Sulimma
 
"Kolja Sulimma" <news@sulimma.de> wrote in message
news:b890a7a.0311261359.2e99abde@posting.google.com...
"walala" <mizhael@yahoo.com> wrote in message
news:<bq0jie$kv2$1@mozo.cc.purdue.edu>...
Dear all,

Is PCI the only convinient interfacing unit that talks with CPU by
inserting
something into a computer conviniently? What is the speed of that? Is
there
any faster method?
PCI is the only relatively fast interface that is available on almost
any computer for internal extensions and has good operating system
support for hardware drivers. The usual 32-Bit, 33MHz PCI can provide
133MB/s in theory of which about 90MByte/s are usable without to much
effort for writes, considerably less for reads. There are also 66MHz
and/or 64-Bit variants available on more expensive mainboards.

But there are lots of alternatives.
There are faster "PCI-like" interfaces like AGP, PCI-X, PCI-Express
(only possible with some FPGAs).
You can also connect your hardware via ATA or SCSI busses. That's
about the speed of PCI. For data aquisition tasks you can make your
hardware look like a tape drive so that you do not need to write a
driver and readout software. Just use the tar command for that.

Probably the fastest interface inside a PC is a memory slot. But
getting OS support for your device in this case is not straight
forward. But there are a couple of GByte/s available there.

And then you can use all the external interfaces: FireWire, USB,
Ethernet, ...

Kolja Sulimma
Click to expand...
Hi, Kolja,

Thanks a lot for your help!

Can you compare in a little more detail of those internal or external
interfaces?

For example, USB vs. PCI? Or PCI-X vs. FireWire?

I guess USB is not as fast as PCI, right?

Thanks a lot,

-Walala
 
Hi,

I am working with PCI-X Interface, which is 64bits wide and 133Mhz.

But I have some problem in getting this much frequency in Xilinx FPGA?

Regards,
Muthu


"walala" <mizhael@yahoo.com> wrote in message news:<bq3avb$nt9$1@mozo.cc.purdue.edu>...
"Kolja Sulimma" <news@sulimma.de> wrote in message
news:b890a7a.0311261359.2e99abde@posting.google.com...
"walala" <mizhael@yahoo.com> wrote in message
news:<bq0jie$kv2$1@mozo.cc.purdue.edu>...
Dear all,

Is PCI the only convinient interfacing unit that talks with CPU by
inserting
something into a computer conviniently? What is the speed of that? Is
there
any faster method?
PCI is the only relatively fast interface that is available on almost
any computer for internal extensions and has good operating system
support for hardware drivers. The usual 32-Bit, 33MHz PCI can provide
133MB/s in theory of which about 90MByte/s are usable without to much
effort for writes, considerably less for reads. There are also 66MHz
and/or 64-Bit variants available on more expensive mainboards.

But there are lots of alternatives.
There are faster "PCI-like" interfaces like AGP, PCI-X, PCI-Express
(only possible with some FPGAs).
You can also connect your hardware via ATA or SCSI busses. That's
about the speed of PCI. For data aquisition tasks you can make your
hardware look like a tape drive so that you do not need to write a
driver and readout software. Just use the tar command for that.

Probably the fastest interface inside a PC is a memory slot. But
getting OS support for your device in this case is not straight
forward. But there are a couple of GByte/s available there.

And then you can use all the external interfaces: FireWire, USB,
Ethernet, ...

Kolja Sulimma

Hi, Kolja,

Thanks a lot for your help!

Can you compare in a little more detail of those internal or external
interfaces?

For example, USB vs. PCI? Or PCI-X vs. FireWire?

I guess USB is not as fast as PCI, right?

Thanks a lot,

-Walala
Click to expand...
 
Can you compare in a little more detail of those internal or external
interfaces?

For example, USB vs. PCI? Or PCI-X vs. FireWire?

I guess USB is not as fast as PCI, right?
Click to expand...
This is a little bit OT for this group, but anyway:
All this depends on your application, the interfaces have various
strengths and weeknesses in areas like latency, streaming read/write,
single reads/writes and so on. Also, utilisation of the bandwidth
tends to become worse for the faster interfaces.
But very roughly
USB2.0, FireWire four times as fast as 100Mb Ethernet
PCI, U160-SCSI, Fibre Channel, Gb-Ethernet are twice as fast as
USB2.0/FireWire
PCI32-66MHz, PCI64-33MHz, U320-SCSI, 2Gb Fibre Channelare twice as
fast as PCI32-33MHz
PCI64-66MHz, PCI-X-66MHz, 1xInfiniBand, 1xPCI-Express are twice as
fast as PCI32-66MHz.
PCI-X-1.0-133MHz is twice as fast as PCI-X-66MHz
PCI-X-2.0-266MHz, 10Gb Fibre Channel, 10 Gb Ethernet, 4xInfiniBand,
4xPCI-Express are twice as fast as PCI-X-133MHz
PCI-X-2.0-533MHz is twice as fast as PCI-X-266MHz
PCI-X-3.0-1066MHz, 40 Gb Ethernet will be twice as fast as
PCI-X-533MHz

Somewhere in the upper range there are AMDs HyperTransport and
Motorolas RapidIO

Kolja Sulimma
 
If you are looking for "coprocessing" types of connectivity, AMD
Opterons with Hypertransport are one possibility. FPGAs can directly
attach to an Opteron via Hypertransport--FPGAs cannot directly connect
to an Intel CPU Front Side Bus (FSB). In addition, all the external
transactions flow through the Intel FSB whereas the onboard Opteron
Memory Controller will service a substantial amount of load--leaving
only the IO traffic for the hypertransport links.

Paul

walala wrote:
Dear all,

Is PCI the only convinient interfacing unit that talks with CPU by inserting
something into a computer conviniently? What is the speed of that? Is there
any faster method?

Thanks a lot,

-Walala
Click to expand...
 
"Muthu" <muthu_nano@yahoo.co.in> wrote in message
news:28c66cd3.0311262012.2808420c@posting.google.com...
Hi,

I am working with PCI-X Interface, which is 64bits wide and 133Mhz.

But I have some problem in getting this much frequency in Xilinx FPGA?

Regards,
Muthu


Hi, Muthu,
Click to expand...

So you mean you cannot get such speed as claimed?

-Walala
 
PCI-X-3.0-1066MHz, 40 Gb Ethernet will be twice as fast as
PCI-X-533MHz
Click to expand...

Dear Koja,

I still have a small question: you said 40GB Ethernet is twice as fast as
PCI-X-533MHz... but why 1) we have not seen any Ethernet inside PC? 2)Why
don't we use that in our Lan other than our currently using 100M ethernet...

maybe that's very expensive price... am I right?

thanks a lot,

-wAlala
 
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