From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [dpdk-dev] [Bug 322] eal: ctrl thread calculation assumes 1:1 mapping between cpu and lcore id
Date: Tue, 16 Jul 2019 08:48:48 +0000 [thread overview]
Message-ID: <bug-322-3@http.bugs.dpdk.org/> (raw)
https://bugs.dpdk.org/show_bug.cgi?id=322
Bug ID: 322
Summary: eal: ctrl thread calculation assumes 1:1 mapping
between cpu and lcore id
Product: DPDK
Version: 18.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: johan.kallstrom@ericsson.com
Target Milestone: ---
ctrl thread calculation assumes 1:1 mapping between cpu and lcore id.
This is not the case when --lcores and the optional cpuset mask is used.
The calculation introduced in c3568ea376700 (and 18.11.2 23a9f69ed3d9) assumes
a 1:1 mapping between cpu and lcore id. This is not the case when --lcores and
the optional cpuset mask is used.
The calculation fails when --lcores and cpuset mask is set so cpu and lcore no
longer maps 1:1.
The code silently started on the wrong physical thread with following eal
arguments(if not cpusets are used to limit the thread affinity):
--master-lcore 0 --lcores (0,19)@(19,1,2,3)
If cpusets are used(and the calculated thread is outside the cpuset) eal fails
to start with the following output:
EAL: Failed to create thread for interrupt handling
EAL: FATAL: Cannot init interrupt-handling thread
EAL: Cannot init interrupt-handling thread
EAL: Error - exiting with code: 1
Cause: Invalid EAL arguments: -1 - Unknown error -1
--
You are receiving this mail because:
You are the assignee for the bug.
reply other threads:[~2019-07-16 8:48 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=bug-322-3@http.bugs.dpdk.org/ \
--to=bugzilla@dpdk.org \
--cc=dev@dpdk.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.