From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=+UyZ=TG=dpdk.org=dev-bounces@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no
	version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id A30B8C04A6B
	for <dpdk-dev@archiver.kernel.org>; Mon,  6 May 2019 13:00:50 +0000 (UTC)
Received: from dpdk.org (dpdk.org [92.243.14.124])
	by mail.kernel.org (Postfix) with ESMTP id 5A88B206BF
	for <dpdk-dev@archiver.kernel.org>; Mon,  6 May 2019 13:00:50 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5A88B206BF
Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=dpdk.org
Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dev-bounces@dpdk.org
Received: from [92.243.14.124] (localhost [127.0.0.1])
	by dpdk.org (Postfix) with ESMTP id B7CDB2BBB;
	Mon,  6 May 2019 15:00:48 +0200 (CEST)
Received: by dpdk.org (Postfix, from userid 33)
 id 916AC2BBB; Mon,  6 May 2019 15:00:47 +0200 (CEST)
From: bugzilla@dpdk.org
To: dev@dpdk.org
Date: Mon, 06 May 2019 13:00:47 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: DPDK
X-Bugzilla-Component: core
X-Bugzilla-Version: 19.05
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mattias.ronnblom@ericsson.com
X-Bugzilla-Status: CONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: Normal
X-Bugzilla-Assigned-To: dev@dpdk.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform
 op_sys bug_status bug_severity priority component assigned_to reporter
 target_milestone
Message-ID: <bug-276-3@http.bugs.dpdk.org/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://bugs.dpdk.org/
Auto-Submitted: auto-generated
X-Auto-Response-Suppress: All
MIME-Version: 1.0
Subject: [dpdk-dev] [Bug 276] rte_rand() bit 31 and 63 are always zero
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

https://bugs.dpdk.org/show_bug.cgi?id=3D276

            Bug ID: 276
           Summary: rte_rand() bit 31 and 63 are always zero
           Product: DPDK
           Version: 19.05
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: mattias.ronnblom@ericsson.com
  Target Milestone: ---

rte_rand() is specified as returning a 64-bit pseudo-random number, but only
returns 62 bit worth of randomness.

The implementation uses two lrand48() calls, which each returns a 31-bit ra=
ndom
number. This results in bit 31 and 63 always being zero.

--=20
You are receiving this mail because:
You are the assignee for the bug.=