Mercurial > flash_v2
diff packages/devs/eth/arm/ebsa285/current/ChangeLog @ 121:6bd9d475ed4b ecos-sw-2000-09-04
Merge from eCos master repository on 2000-09-04-20:50:20-BST
| author | jlarmour |
|---|---|
| date | Mon, 04 Sep 2000 20:24:12 +0000 |
| parents | bd1a71e3e476 |
| children | 0ec04793409a |
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--- a/packages/devs/eth/arm/ebsa285/current/ChangeLog +++ b/packages/devs/eth/arm/ebsa285/current/ChangeLog @@ -1,3 +1,34 @@ +2000-09-01 Hugo Tyson <hmt@cygnus.co.uk> + + * OVERVIEW: This is part of the change to the network stack to + greatly reduce latencies both of (other) DSRs and of thread + scheduling. All the work that the network stack *and* individual + ether drivers used to do in DSRs (including alarm callbacks and + data copies to/from the device memory) is moved into a "fast + network thread" instead. It calls a device's "deliver" function + to do the work that was previously in the DSR. This is a separate + thread so that it can be set higher priority than application + threads in order to minimize packet loss (depending on the + driver), if required (the application threads presumed to be + higher priority in turn than the network thread). A crucial + consequence of this is that we are no longer locking against DSRs, + so a plain mutex can be used rather than the global scheduler + lock, thus simplifying all the splfoo/splx() style functions. + + * src/if_ebsa285.c: Minor: fix the big assert in i82559_send() + which suffered a race condition when called from the fast thread + rather than from a DSR. Major: Add a "deliver" entry to the + interface record for the "fast thread" implementation of the + network internal comms system. Provide a pass-up DSR to the + logical ether driver's DSR and appropriate delivery routine(s). + i82559_poll() now calls i82559_deliver() rather than the DSR. Add + valid data for mux'd DSR to pass on up. + +2000-09-01 Hugo Tyson <hmt@cygnus.co.uk> + + * tests/test_net_realtime.h: Tighten up the latency requirements + by a factor of 5; it all seems happy, so committed. + 2000-08-25 Hugo Tyson <hmt@cygnus.co.uk> * src/if_ebsa285.c (i82559_ioctl): A little further diddling; have
