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examples/l3fwd-power: fix frequency detection

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The code assumes that the platform frequency is 2GHz.
This patch add support for dynamically detecting platform frequence.

Fixes: d7937e2e3d12 ("power: initial import")
Cc: stable@dpdk.org

Signed-off-by: Nikhil Agarwal <nikhil.agarwal@linaro.org>
Acked-by: David Hunt <david.hunt@intel.com>
This commit is contained in:
Nikhil Agarwal 2017-12-12 15:38:24 +05:30 committed by Thomas Monjalon
parent 4ffc0a883b
commit 63de7e6e4f
1 changed files with 4 additions and 4 deletions
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8
examples/l3fwd-power/main.c
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@ -50,8 +50,6 @@
#define MIN_ZERO_POLL_COUNT 10
/* around 100ms at 2 Ghz */
#define TIMER_RESOLUTION_CYCLES 200000000ULL
/* 100 ms interval */
#define TIMER_NUMBER_PER_SECOND 10
/* 100000 us */
@ -846,7 +844,7 @@ main_loop(__attribute__((unused)) void *dummy)
{
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
unsigned lcore_id;
uint64_t prev_tsc, diff_tsc, cur_tsc;
uint64_t prev_tsc, diff_tsc, cur_tsc, tim_res_tsc, hz;
uint64_t prev_tsc_power = 0, cur_tsc_power, diff_tsc_power;
int i, j, nb_rx;
uint8_t queueid;
@ -861,6 +859,8 @@ main_loop(__attribute__((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;
hz = rte_get_timer_hz();
tim_res_tsc = hz/TIMER_NUMBER_PER_SECOND;
lcore_id = rte_lcore_id();
qconf = &lcore_conf[lcore_id];
@ -906,7 +906,7 @@ main_loop(__attribute__((unused)) void *dummy)
}
diff_tsc_power = cur_tsc_power - prev_tsc_power;
if (diff_tsc_power > TIMER_RESOLUTION_CYCLES) {
if (diff_tsc_power > tim_res_tsc) {
rte_timer_manage();
prev_tsc_power = cur_tsc_power;
}