[dpdk-stable] patch 'examples/l3fwd-power: fix frequency detection' has been queued to LTS release 17.11.1
Yuanhan Liu
yliu at fridaylinux.org
Wed Jan 24 16:31:35 CET 2018
Hi,
FYI, your patch has been queued to LTS release 17.11.1
Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/26/18. So please
shout if anyone has objections.
Thanks.
--yliu
---
>From 39d670535edc0be13d1b8383fb49ca2085322004 Mon Sep 17 00:00:00 2001
From: Nikhil Agarwal <nikhil.agarwal at linaro.org>
Date: Tue, 12 Dec 2017 15:38:24 +0530
Subject: [PATCH] examples/l3fwd-power: fix frequency detection
[ upstream commit 63de7e6e4fb507755c8306cb50ef27b85c8f6f2d ]
The code assumes that the platform frequency is 2GHz.
This patch add support for dynamically detecting platform frequence.
Fixes: d7937e2e3d12 ("power: initial import")
Signed-off-by: Nikhil Agarwal <nikhil.agarwal at linaro.org>
Acked-by: David Hunt <david.hunt at intel.com>
---
examples/l3fwd-power/main.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index d335b0d..50c3702 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -79,8 +79,6 @@
#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 */
@@ -875,7 +873,7 @@ 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;
@@ -890,6 +888,8 @@ 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];
@@ -935,7 +935,7 @@ 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;
}
--
2.7.4
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