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Programmable RSS: handle single queue separately #3

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Programmable RSS: handle single queue separately #3

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55 changes: 55 additions & 0 deletions programmable_rss/rss_user.c
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,46 @@ static int get_interface_rx_channels(int ifindex)
return cmd.combined_count + cmd.rx_count;
}

static int poll_stats_single_queue(int indirect_map_fd, int queue, int poll_secs)
{
struct indirect_queue indirect_lookup;
int value = 0, prev = 0;
struct timespec t1, t2;
double time_taken;
long queue_rate;
int i = 0;

/* use thousand separators in printf */
setlocale(LC_NUMERIC, "en_US");

clock_gettime(CLOCK_MONOTONIC_RAW, &t1);

while (true) {
printf("-------------------------------------------------\n\n");
if (bpf_map_lookup_elem(indirect_map_fd,
&i, &indirect_lookup) != 0) {
printf("Err lookup failed\n");
return 0;
}

value = indirect_lookup.packet_cnt;

/* calc sample period to allow rate to be obtained */
clock_gettime(CLOCK_MONOTONIC_RAW, &t2);
time_taken = (t2.tv_sec + 1.0e-9 * t2.tv_nsec) -
(t1.tv_sec + 1.0e-9 * t1.tv_nsec);

queue_rate = (value - prev) / time_taken;
printf("RSS Queue %d: %'ld\n", queue, queue_rate);
prev = value;
value = 0;

t1 = t2;
usleep(poll_secs * 1000 * 1000);
}
}


static int poll_stats(int indirect_map_fd, int queues_enabled, int poll_secs)
{
struct indirect_queue indirect_lookup;
Expand Down Expand Up @@ -231,6 +271,21 @@ int main(int argc, char **argv)
return -1;
}

/* use indirection map for stats in the single queue case */
if (mapctrl.select_mode == QUEUE_STATIC) {
indirect_rec.queue_num = mapctrl.queue_static;
i = 0;

if (bpf_map_update_elem(indirect_map_fd, &i, &indirect_rec,
BPF_ANY) != 0) {
printf("Err: Map update failed\n");
return -1;
}

poll_stats_single_queue(indirect_map_fd, mapctrl.queue_static, 1);
return 0;
}

/* fill ctrl map with hash mode queues */
key = 0;
if (bpf_map_update_elem(ctrl_map_fd, &key, &mapctrl, BPF_ANY) != 0) {
Expand Down