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Hermes SMTP Server) with ESMTPA ID b0c4acf9b4fd31612e191822fc3eef95; Sat, 06 Dec 2025 14:14:18 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.700.81\)) Subject: RE: performance regressions in 15.0 Message-Id: Date: Sat, 6 Dec 2025 06:14:07 -0800 To: mjguzik@gmail.com, FreeBSD Current , FreeBSD-STABLE Mailing List X-Mailer: Apple Mail (2.3826.700.81) References: X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.76 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; NEURAL_SPAM_SHORT(0.24)[0.236]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; FREEMAIL_TO(0.00)[gmail.com,freebsd.org]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim]; FREEMAIL_FROM(0.00)[yahoo.com]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org]; APPLE_MAILER_COMMON(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.69.147:from]; RCVD_IN_DNSWL_NONE(0.00)[98.137.69.147:from] X-Rspamd-Queue-Id: 4dNqxW6T07z3sNP Mateusz Guzik wrote on Date: Sat, 06 Dec 2025 10:50:08 UTC : > I got pointed at phoronix: = https://www.phoronix.com/review/freebsd-15-amd-epyc >=20 > While I don't treat their results as gospel, a FreeBSD vs FreeBSD test > showing a slowdown most definitely warrants a closer look. >=20 > They observed slowdowns when using iperf over localhost and when = compiling llvm. >=20 > I can confirm both problems and more. >=20 > I found the profiling tooling for userspace to be broken again so I > did not investigate much and I'm not going to dig into it further. >=20 > Test box is AMD EPYC 9454 48-Core Processor, with the 2 systems > running as 8 core vms under kvm. > . . . Both of the below are from ampere3 (aarch64) instead, its 2 most recent "bulk -a" runs that completed, elapsed times shown for qt6-webengine-6.9.3 builds: 150releng-arm64-quarterly qt6-webengine-6.9.3 53:33:46 135arm64-default qt6-webengine-6.9.3 38:43:36 For reference: Host OSVERSION: 1600000 Jail OSVERSION: 1500068 vs. Host OSVERSION: 1600000 Jail OSVERSION: 1305000 The difference for the above is in the Jail's world builds, not in the boot's (kernel+world) builds. For reference: = https://pkg-status.freebsd.org/ampere3/build.html?mastername=3D150releng-a= rm64-quarterly&build=3D88084f9163ae build of www/qt6-webengine | qt6-webengine-6.9.3 ended at Sun Nov 30 = 05:40:02 -00 2025 build time: 2D:05:33:52 = https://pkg-status.freebsd.org/ampere3/build.html?mastername=3D135arm64-de= fault&build=3Df5384fe59be6 build of www/qt6-webengine | qt6-webengine-6.9.3 ended at Sat Nov 22 = 15:33:34 -00 2025 build time: 1D:14:43:41 =3D=3D=3D Mark Millard marklmi at yahoo.com