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PDP11, VAX: Added Ethernet packet transmission throttling support to XQ and XU devices.

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Migrated the XQ help to the hierarchical help model.  This is a work in progress which will eventually merge much from 0readme_ethernet.txt into the device help.
This commit is contained in:
Mark Pizzolato
2014-06-06 15:03:31 -07:00
parent 753e4dc925
commit e9b312f26a
7 changed files with 470 additions and 61 deletions
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24
sim_ether.c
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@@ -365,7 +365,7 @@
#include <ctype.h>
#include "sim_ether.h"
#include "sim_sock.h"
#include "sim_timer.h"
/*============================================================================*/
/* OS-independant ethernet routines */
@@ -1670,6 +1670,16 @@ while (dev->handle) {
dev->write_requests = request->next;
pthread_mutex_unlock (&dev->writer_lock);
if (dev->throttle_delay != ETH_THROT_DISABLED_DELAY) {
uint32 packet_delta_time = sim_os_msec() - dev->throttle_packet_time;
dev->throttle_events <<= 1;
dev->throttle_events += (packet_delta_time < dev->throttle_time) ? 1 : 0;
if ((dev->throttle_events & dev->throttle_mask) == dev->throttle_mask) {
sim_os_ms_sleep (dev->throttle_delay);
++dev->throttle_count;
}
dev->throttle_packet_time = sim_os_msec();
}
dev->write_status = _eth_write(dev, &request->packet, NULL);
pthread_mutex_lock (&dev->writer_lock);
@@ -1720,6 +1730,16 @@ return SCPE_OK;
#endif
}
t_stat eth_set_throttle (ETH_DEV* dev, uint32 time, uint32 burst, uint32 delay)
{
if (!dev)
return SCPE_IERR;
dev->throttle_time = time;
dev->throttle_burst = burst;
dev->throttle_delay = delay;
dev->throttle_mask = (1 << dev->throttle_burst) - 1;
return SCPE_OK;
}
t_stat eth_open(ETH_DEV* dev, char* name, DEVICE* dptr, uint32 dbit)
{
int bufsz = (BUFSIZ < ETH_MAX_PACKET) ? ETH_MAX_PACKET : BUFSIZ;
@@ -3516,6 +3536,8 @@ if (dev->loopback_packets_processed)
fprintf(st, " Asynch Interrupts: %s\n", dev->asynch_io?"Enabled":"Disabled");
if (dev->asynch_io)
fprintf(st, " Interrupt Latency: %d uSec\n", dev->asynch_io_latency);
if (dev->throttle_count)
fprintf(st, " Throttle Delays: %d\n", dev->throttle_count);
fprintf(st, " Read Queue: Count: %d\n", dev->read_queue.count);
fprintf(st, " Read Queue: High: %d\n", dev->read_queue.high);
fprintf(st, " Read Queue: Loss: %d\n", dev->read_queue.loss);