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examples/l3fwd: skip Tx queue drain on first iteration

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Initialize prev_tsc to cur_tsc. This avoids running the TX queue drain
in the first iteration of the packet processing loop.

Signed-off-by: Kathleen Capella <kathleen.capella@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
This commit is contained in:
Kathleen Capella 2021-04-08 21:35:49 +00:00 committed by Thomas Monjalon
parent e1d10a42f6
commit a8f8b672d5
2 changed files with 10 additions and 8 deletions
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9
examples/l3fwd/l3fwd_em.c
View File

@ -629,8 +629,6 @@ em_main_loop(__rte_unused void *dummy)
const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
US_PER_S * BURST_TX_DRAIN_US;
prev_tsc = 0;
lcore_id = rte_lcore_id();
qconf = &lcore_conf[lcore_id];
@ -650,9 +648,10 @@ em_main_loop(__rte_unused void *dummy)
lcore_id, portid, queueid);
}
while (!force_quit) {
cur_tsc = rte_rdtsc();
prev_tsc = cur_tsc;
cur_tsc = rte_rdtsc();
while (!force_quit) {
/*
* TX burst queue drain
@ -692,6 +691,8 @@ em_main_loop(__rte_unused void *dummy)
portid, qconf);
#endif
}
cur_tsc = rte_rdtsc();
}
return 0;

9
examples/l3fwd/l3fwd_lpm.c
View File

@ -185,8 +185,6 @@ lpm_main_loop(__rte_unused void *dummy)
const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
US_PER_S * BURST_TX_DRAIN_US;
prev_tsc = 0;
lcore_id = rte_lcore_id();
qconf = &lcore_conf[lcore_id];
@ -206,9 +204,10 @@ lpm_main_loop(__rte_unused void *dummy)
lcore_id, portid, queueid);
}
while (!force_quit) {
cur_tsc = rte_rdtsc();
prev_tsc = cur_tsc;
cur_tsc = rte_rdtsc();
while (!force_quit) {
/*
* TX burst queue drain
@ -249,6 +248,8 @@ lpm_main_loop(__rte_unused void *dummy)
portid, qconf);
#endif /* X86 */
}
cur_tsc = rte_rdtsc();
}
return 0;