From: Stephen Hemminger <stephen@networkplumber.org>
To: Feifei Wang <feifei.wang2@arm.com>
Cc: David Hunt <david.hunt@intel.com>,
dev@dpdk.org, david.marchand@redhat.com, thomas@monjalon.net,
nd@arm.com, Ruifeng Wang <ruifeng.wang@arm.com>
Subject: Re: [PATCH v2 3/3] examples/l3fwd-power: enable PMD power monitor on Arm
Date: Mon, 7 Nov 2022 08:01:44 -0800 [thread overview]
Message-ID: <20221107080144.34cdde78@hermes.local> (raw)
In-Reply-To: <20221107070449.3319078-4-feifei.wang2@arm.com>
On Mon, 7 Nov 2022 15:04:49 +0800
Feifei Wang <feifei.wang2@arm.com> wrote:
> + /* Ensure the main lcore does not enter the power-monitor state,
> + * so that it can be used to wake up other lcores on ARM.
> + * This is due to WFE instruction has no timeout wake-up mechanism,
> + * and if users want to exit actively, the main lcore is needed
> + * to send SEV instruction to wake up other lcores.
> + */
> + unsigned int main_lcore = rte_get_main_lcore();
This can be done in a simpler an cleaner manner with a continue statement
earlier in the loop.
diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index fd3ade330f82..115535fd4cd7 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -2984,6 +2984,16 @@ main(int argc, char **argv)
}
if (app_mode == APP_MODE_PMD_MGMT && !baseline_enabled) {
+#ifdef RTE_ARCH_ARM64
+ /* Ensure the main lcore does not enter the power-monitor state,
+ * so that it can be used to wake up other lcores on ARM.
+ * This is due to WFE instruction has no timeout wake-up mechanism,
+ * and if users want to exit actively, the main lcore is needed
+ * to send SEV instruction to wake up other lcors.
+ */
+ if (lcore_id == rte_get_main_lcore())
+ continue;
+#endif
/* Set power_pmd_mgmt configs passed by user */
rte_power_pmd_mgmt_set_emptypoll_max(max_empty_polls);
ret = rte_power_pmd_mgmt_set_pause_duration(pause_duration);
next prev parent reply other threads:[~2022-11-07 16:01 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-25 6:42 [PATCH v1 0/3] Enable PMD power management " Feifei Wang
2022-08-25 6:42 ` [PATCH v1 1/3] eal: add 8 bits case for wait scheme Feifei Wang
2022-08-25 6:42 ` [PATCH v1 2/3] eal: add power mgmt support on Arm Feifei Wang
2022-08-25 6:42 ` [PATCH v1 3/3] examples/l3fwd-power: enable PMD power mgmt " Feifei Wang
2022-08-29 12:48 ` Hunt, David
2022-10-03 7:12 ` David Marchand
2022-10-11 7:56 ` 回复: " Feifei Wang
2022-10-20 20:41 ` Thomas Monjalon
2022-10-27 9:38 ` 回复: " Feifei Wang
2022-10-20 22:09 ` Stephen Hemminger
2022-10-27 9:43 ` 回复: " Feifei Wang
2022-11-07 7:04 ` [PATCH v2 0/3] Enable PMD power management " Feifei Wang
2022-11-07 7:04 ` [PATCH v2 1/3] eal: add 8 bits case for wait scheme Feifei Wang
2022-11-07 7:04 ` [PATCH v2 2/3] eal: add power mgmt support on Arm Feifei Wang
2022-11-07 7:04 ` [PATCH v2 3/3] examples/l3fwd-power: enable PMD power monitor " Feifei Wang
2022-11-07 16:01 ` Stephen Hemminger [this message]
2022-11-08 3:25 ` 回复: " Feifei Wang
2022-11-11 7:26 ` [PATCH v3 0/3] Enable PMD power management " Feifei Wang
2022-11-11 7:26 ` [PATCH v3 1/3] eal: add 8 bits case for wait scheme Feifei Wang
2022-11-11 7:26 ` [PATCH v3 2/3] eal: add power mgmt support on Arm Feifei Wang
2022-11-11 7:26 ` [PATCH v3 3/3] examples/l3fwd-power: enable PMD power monitor " Feifei Wang
2022-11-11 8:22 ` Thomas Monjalon
2022-11-11 10:21 ` 回复: " Feifei Wang
2022-11-11 10:20 ` [PATCH v4 0/4] Enable PMD power management " Feifei Wang
2022-11-11 10:20 ` [PATCH v4 1/4] eal: add 8 bits case for wait scheme Feifei Wang
2022-11-11 10:20 ` [PATCH v4 2/4] eal: add power mgmt support on Arm Feifei Wang
2022-11-11 10:20 ` [PATCH v4 3/4] power: add power monitor support check Feifei Wang
2022-11-11 10:20 ` [PATCH v4 4/4] examples/l3fwd-power: add power monitor wake up API Feifei Wang
2022-12-14 8:14 ` [PATCH v5 0/2] Enable PMD power management on Arm Feifei Wang
2022-12-14 8:14 ` [PATCH v5 1/2] eal: add 8 bits case for wait scheme Feifei Wang
2022-12-14 8:14 ` [PATCH v5 2/2] eal: add power mgmt support on Arm Feifei Wang
2023-02-17 16:23 ` Stephen Hemminger
2023-02-20 1:56 ` 回复: " Feifei Wang
2023-02-17 8:26 ` 回复: [PATCH v5 0/2] Enable PMD power management " Feifei Wang
2023-02-20 8:51 ` [PATCH v6 " Feifei Wang
2023-02-20 8:51 ` [PATCH v6 1/2] eal: add 8 bits case for wait scheme Feifei Wang
2023-02-20 8:51 ` [PATCH v6 2/2] eal: add power mgmt support on Arm Feifei Wang
2023-02-20 12:07 ` [PATCH v6 0/2] Enable PMD power management " David Marchand
2023-02-21 2:37 ` 回复: " Feifei Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221107080144.34cdde78@hermes.local \
--to=stephen@networkplumber.org \
--cc=david.hunt@intel.com \
--cc=david.marchand@redhat.com \
--cc=dev@dpdk.org \
--cc=feifei.wang2@arm.com \
--cc=nd@arm.com \
--cc=ruifeng.wang@arm.com \
--cc=thomas@monjalon.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).