void TimerCalculator::calculate(unsigned long duration)
{
_duration = duration;
t2_prescaler_pointer = 0;
t2_comparator = 1;
t1_comparator = 1;
// clock_period = CLOCK_PERIOD;
unsigned long max_t1_comparator = 65535;
unsigned long max_duration = calc_period(max_t1_comparator);
while (duration > max_duration)
{
if (t2_comparator < (t2_prescaler_array[t2_prescaler_pointer + 1] / t2_prescaler_array[t2_prescaler_pointer]))
{
t2_comparator += 1;
}
else {
t2_comparator = 1;
t2_prescaler_pointer += 1;
}
max_duration = calc_period(max_t1_comparator);
if (t2_comparator == MAX_T2_COMPARATOR) break;
}
t1_comparator = (int)(duration / calc_t2_period());
}
static void stats_print(struct stats_record *stats_rec,
struct stats_record *stats_prev,
int prog_num)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
double pps = 0, drop = 0, err = 0;
struct record *rec, *prev;
int to_cpu;
double t;
int i;
/* Header */
printf("Running XDP/eBPF prog_num:%d\n", prog_num);
printf("%-15s %-7s %-14s %-11s %-9s\n",
"XDP-cpumap", "CPU:to", "pps", "drop-pps", "extra-info");
/* XDP rx_cnt */
{
char *fmt_rx = "%-15s %-7d %'-14.0f %'-11.0f %'-10.0f %s\n";
char *fm2_rx = "%-15s %-7s %'-14.0f %'-11.0f\n";
char *errstr = "";
rec = &stats_rec->rx_cnt;
prev = &stats_prev->rx_cnt;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop_pps(r, p, t);
err = calc_errs_pps(r, p, t);
if (err > 0)
errstr = "cpu-dest/err";
if (pps > 0)
printf(fmt_rx, "XDP-RX",
i, pps, drop, err, errstr);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
printf(fm2_rx, "XDP-RX", "total", pps, drop);
}
/* cpumap enqueue stats */
for (to_cpu = 0; to_cpu < MAX_CPUS; to_cpu++) {
char *fmt = "%-15s %3d:%-3d %'-14.0f %'-11.0f %'-10.2f %s\n";
char *fm2 = "%-15s %3s:%-3d %'-14.0f %'-11.0f %'-10.2f %s\n";
char *errstr = "";
rec = &stats_rec->enq[to_cpu];
prev = &stats_prev->enq[to_cpu];
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop_pps(r, p, t);
err = calc_errs_pps(r, p, t);
if (err > 0) {
errstr = "bulk-average";
err = pps / err; /* calc average bulk size */
}
if (pps > 0)
printf(fmt, "cpumap-enqueue",
i, to_cpu, pps, drop, err, errstr);
}
pps = calc_pps(&rec->total, &prev->total, t);
if (pps > 0) {
drop = calc_drop_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
if (err > 0) {
errstr = "bulk-average";
err = pps / err; /* calc average bulk size */
}
printf(fm2, "cpumap-enqueue",
"sum", to_cpu, pps, drop, err, errstr);
}
}
/* cpumap kthread stats */
{
char *fmt_k = "%-15s %-7d %'-14.0f %'-11.0f %'-10.0f %s\n";
char *fm2_k = "%-15s %-7s %'-14.0f %'-11.0f %'-10.0f %s\n";
char *e_str = "";
rec = &stats_rec->kthread;
prev = &stats_prev->kthread;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop_pps(r, p, t);
err = calc_errs_pps(r, p, t);
if (err > 0)
e_str = "sched";
if (pps > 0)
printf(fmt_k, "cpumap_kthread",
i, pps, drop, err, e_str);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
if (err > 0)
e_str = "sched-sum";
printf(fm2_k, "cpumap_kthread", "total", pps, drop, err, e_str);
}
/* XDP redirect err tracepoints (very unlikely) */
{
char *fmt_err = "%-15s %-7d %'-14.0f %'-11.0f\n";
char *fm2_err = "%-15s %-7s %'-14.0f %'-11.0f\n";
rec = &stats_rec->redir_err;
prev = &stats_prev->redir_err;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop_pps(r, p, t);
if (pps > 0)
printf(fmt_err, "redirect_err", i, pps, drop);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop_pps(&rec->total, &prev->total, t);
printf(fm2_err, "redirect_err", "total", pps, drop);
}
/* XDP general exception tracepoints */
{
char *fmt_err = "%-15s %-7d %'-14.0f %'-11.0f\n";
char *fm2_err = "%-15s %-7s %'-14.0f %'-11.0f\n";
rec = &stats_rec->exception;
prev = &stats_prev->exception;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop_pps(r, p, t);
if (pps > 0)
printf(fmt_err, "xdp_exception", i, pps, drop);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop_pps(&rec->total, &prev->total, t);
printf(fm2_err, "xdp_exception", "total", pps, drop);
}
printf("\n");
fflush(stdout);
}
static void stats_print(struct stats_record *stats_rec,
struct stats_record *stats_prev,
bool err_only)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
int rec_i = 0, i, to_cpu;
double t = 0, pps = 0;
/* Header */
printf("%-15s %-7s %-12s %-12s %-9s\n",
"XDP-event", "CPU:to", "pps", "drop-pps", "extra-info");
/* tracepoint: xdp:xdp_redirect_* */
if (err_only)
rec_i = REDIR_ERROR;
for (; rec_i < REDIR_RES_MAX; rec_i++) {
struct record_u64 *rec, *prev;
char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %s\n";
char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %s\n";
rec = &stats_rec->xdp_redirect[rec_i];
prev = &stats_prev->xdp_redirect[rec_i];
t = calc_period_u64(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct u64rec *r = &rec->cpu[i];
struct u64rec *p = &prev->cpu[i];
pps = calc_pps_u64(r, p, t);
if (pps > 0)
printf(fmt1, "XDP_REDIRECT", i,
rec_i ? 0.0: pps, rec_i ? pps : 0.0,
err2str(rec_i));
}
pps = calc_pps_u64(&rec->total, &prev->total, t);
printf(fmt2, "XDP_REDIRECT", "total",
rec_i ? 0.0: pps, rec_i ? pps : 0.0, err2str(rec_i));
}
/* tracepoint: xdp:xdp_exception */
for (rec_i = 0; rec_i < XDP_ACTION_MAX; rec_i++) {
struct record_u64 *rec, *prev;
char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %s\n";
char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %s\n";
rec = &stats_rec->xdp_exception[rec_i];
prev = &stats_prev->xdp_exception[rec_i];
t = calc_period_u64(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct u64rec *r = &rec->cpu[i];
struct u64rec *p = &prev->cpu[i];
pps = calc_pps_u64(r, p, t);
if (pps > 0)
printf(fmt1, "Exception", i,
0.0, pps, action2str(rec_i));
}
pps = calc_pps_u64(&rec->total, &prev->total, t);
if (pps > 0)
printf(fmt2, "Exception", "total",
0.0, pps, action2str(rec_i));
}
/* cpumap enqueue stats */
for (to_cpu = 0; to_cpu < MAX_CPUS; to_cpu++) {
char *fmt1 = "%-15s %3d:%-3d %'-12.0f %'-12.0f %'-10.2f %s\n";
char *fmt2 = "%-15s %3s:%-3d %'-12.0f %'-12.0f %'-10.2f %s\n";
struct record *rec, *prev;
char *info_str = "";
double drop, info;
rec = &stats_rec->xdp_cpumap_enqueue[to_cpu];
prev = &stats_prev->xdp_cpumap_enqueue[to_cpu];
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop(r, p, t);
info = calc_info(r, p, t);
if (info > 0) {
info_str = "bulk-average";
info = pps / info; /* calc average bulk size */
}
if (pps > 0)
printf(fmt1, "cpumap-enqueue",
i, to_cpu, pps, drop, info, info_str);
}
pps = calc_pps(&rec->total, &prev->total, t);
if (pps > 0) {
drop = calc_drop(&rec->total, &prev->total, t);
info = calc_info(&rec->total, &prev->total, t);
if (info > 0) {
info_str = "bulk-average";
info = pps / info; /* calc average bulk size */
}
printf(fmt2, "cpumap-enqueue",
"sum", to_cpu, pps, drop, info, info_str);
}
}
/* cpumap kthread stats */
{
char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %'-10.0f %s\n";
char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %'-10.0f %s\n";
struct record *rec, *prev;
double drop, info;
char *i_str = "";
rec = &stats_rec->xdp_cpumap_kthread;
prev = &stats_prev->xdp_cpumap_kthread;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop(r, p, t);
info = calc_info(r, p, t);
if (info > 0)
i_str = "sched";
if (pps > 0 || drop > 0)
printf(fmt1, "cpumap-kthread",
i, pps, drop, info, i_str);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop(&rec->total, &prev->total, t);
info = calc_info(&rec->total, &prev->total, t);
if (info > 0)
i_str = "sched-sum";
printf(fmt2, "cpumap-kthread", "total", pps, drop, info, i_str);
}
/* devmap ndo_xdp_xmit stats */
{
char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %'-10.2f %s %s\n";
char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %'-10.2f %s %s\n";
struct record *rec, *prev;
double drop, info, err;
char *i_str = "";
char *err_str = "";
rec = &stats_rec->xdp_devmap_xmit;
prev = &stats_prev->xdp_devmap_xmit;
t = calc_period(rec, prev);
for (i = 0; i < nr_cpus; i++) {
struct datarec *r = &rec->cpu[i];
struct datarec *p = &prev->cpu[i];
pps = calc_pps(r, p, t);
drop = calc_drop(r, p, t);
info = calc_info(r, p, t);
err = calc_err(r, p, t);
if (info > 0) {
i_str = "bulk-average";
info = (pps+drop) / info; /* calc avg bulk */
}
if (err > 0)
err_str = "drv-err";
if (pps > 0 || drop > 0)
printf(fmt1, "devmap-xmit",
i, pps, drop, info, i_str, err_str);
}
pps = calc_pps(&rec->total, &prev->total, t);
drop = calc_drop(&rec->total, &prev->total, t);
info = calc_info(&rec->total, &prev->total, t);
err = calc_err(&rec->total, &prev->total, t);
if (info > 0) {
i_str = "bulk-average";
info = (pps+drop) / info; /* calc avg bulk */
}
if (err > 0)
err_str = "drv-err";
printf(fmt2, "devmap-xmit", "total", pps, drop,
info, i_str, err_str);
}
printf("\n");
}