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Tue, 27 Feb 2024 19:34:23 +0000 Date: Tue, 27 Feb 2024 19:34:18 +0000 (UTC) From: "barney_cordoba@yahoo.com" To: FreeBSD Hackers Message-ID: <1807649627.1646099.1709062458448@mail.yahoo.com> Subject: Callout inprecision List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1646098_116998073.1709062458447" References: <1807649627.1646099.1709062458448.ref@mail.yahoo.com> X-Mailer: WebService/1.1.22103 YMailNorrin X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.98 / 15.00]; FROM_DN_EQ_ADDR(1.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-0.998]; NEURAL_HAM_SHORT(-0.98)[-0.985]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; RCVD_TLS_LAST(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; FREEMAIL_FROM(0.00)[yahoo.com]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; RCVD_IN_DNSWL_NONE(0.00)[66.163.185.204:from]; MID_RHS_MATCH_FROMTLD(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; ASN(0.00)[asn:36646, ipnet:66.163.184.0/21, country:US]; RWL_MAILSPIKE_POSSIBLE(0.00)[66.163.185.204:from]; RCVD_COUNT_ONE(0.00)[1]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim] X-Rspamd-Queue-Id: 4Tknjt270Tz559H ------=_Part_1646098_116998073.1709062458447 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Testing callout precision, I'm getting consistent 5-6% error no matter whic= h of the fancy flags and precision settings used. =C2=A0Hardware clock, sof= t clock, =C2=A0on idle cpus. absolute binary time. Same results. Anyone ever done any testing on these functions or were they just accepted = on faith? 'I expect a bit of flutter but not as much as I'm seeing.=C2=A0 ------=_Part_1646098_116998073.1709062458447 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit
Testing callout precision, I'm getting consistent 5-6% error no matter which of the fancy flags and precision settings used.  Hardware clock, soft clock,  on idle cpus. absolute binary time. Same results.

Anyone ever done any testing on these functions or were they just accepted on faith? 'I expect a bit of flutter but not as much as I'm seeing. 
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