From: <jerry.lilijun@huawei.com>
To: <dev@dpdk.org>
Subject: [dpdk-dev] [PATCH] eal: decrease the memory init time with many hugepages setup
Date: Thu, 2 Apr 2015 19:30:30 +0800 [thread overview]
Message-ID: <1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com> (raw)
From: Lilijun <jerry.lilijun@huawei.com>
In the function map_all_hugepages(), hugepage memory is truly allocated by
memset(virtaddr, 0, hugepage_sz). Then it costs about 40s to finish the
dpdk memory initialization when 40000 2M hugepages are setup in host os.
In fact we can only write one byte to finish the allocation.
Signed-off-by: Lilijun <jerry.lilijun@huawei.com>
---
lib/librte_eal/linuxapp/eal/eal_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5f9f92e..8bbee9c 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -378,7 +378,7 @@ map_all_hugepages(struct hugepage_file *hugepg_tbl,
if (orig) {
hugepg_tbl[i].orig_va = virtaddr;
- memset(virtaddr, 0, hugepage_sz);
+ memset(virtaddr, 0, 1);
}
else {
hugepg_tbl[i].final_va = virtaddr;
--
1.9.4.msysgit.1
next reply other threads:[~2015-04-02 11:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 11:30 jerry.lilijun [this message]
2015-04-02 12:55 ` Thomas Monjalon
2015-04-02 13:41 ` Jay Rolette
2015-04-03 9:04 ` Gonzalez Monroy, Sergio
2015-04-03 9:14 ` Thomas Monjalon
2015-04-03 9:37 ` Lilijun
2015-04-03 12:00 ` Gonzalez Monroy, Sergio
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=1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com \
--to=jerry.lilijun@huawei.com \
--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 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).