On Mon, Dec 12, 2011 at 02:47:57PM +0100, O. Hartmann wrote: > > Not fully right, boinc defaults to run on idprio 31 so this isn't an > > issue. And yes, there are cases where SCHED_ULE shows much better > > performance then SCHED_4BSD. [...] > > Do we have any proof at hand for such cases where SCHED_ULE performs > much better than SCHED_4BSD? Whenever the subject comes up, it is > mentioned, that SCHED_ULE has better performance on boxes with a ncpu > > 2. But in the end I see here contradictionary statements. People > complain about poor performance (especially in scientific environments), > and other give contra not being the case. > > Within our department, we developed a highly scalable code for planetary > science purposes on imagery. It utilizes present GPUs via OpenCL if > present. Otherwise it grabs as many cores as it can. > By the end of this year I'll get a new desktop box based on Intels new > Sandy Bridge-E architecture with plenty of memory. If the colleague who > developed the code is willing performing some benchmarks on the same > hardware platform, we'll benchmark bot FreeBSD 9.0/10.0 and the most > recent Suse. For FreeBSD I intent also to look for performance with both > different schedulers available. This is in no way shape or form the same kind of benchmark as what you're planning to do, but I thought I'd throw it out there for folks to take in as they see fit. I know folks were focused mainly on buildworld. I personally would find it interesting if someone with a higher-end system (e.g. 2 physical CPUs, with 6 or 8 cores per CPU) was to do the same test (changing -jX to -j{numofcores} of course). -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB | sched_ule =========== - time make -j2 buildworld 1689.831u 229.328s 18:46.20 170.4% 6566+2051k 432+4264io 4565pf+0w - time make -j2 buildkernel 640.542u 87.737s 9:01.38 134.5% 6490+1920k 134+5968io 0pf+0w sched_4bsd ============ - time make -j2 buildworld 1662.793u 206.908s 17:12.02 181.1% 6578+2054k 23750+4271io 6451pf+0w - time make -j2 buildkernel 638.717u 76.146s 8:34.90 138.8% 6530+1927k 6415+5903io 0pf+0w software ========== * sched_ule test: FreeBSD 8.2-STABLE, Thu Dec 1 04:37:29 PST 2011 * sched_4bsd test: FreeBSD 8.2-STABLE, Mon Dec 12 22:42:54 PST 2011 hardware ========== * Intel Core 2 Duo E8400, 3GHz * Supermicro X7SBA * 8GB ECC RAM (4x2GB), DDR2-800 * Intel 320-series SSD, 80GB: /, swap, /var, /tmp, /usr tuning adjustments / etc. =========================== * Before each scheduler test, system was rebooted to ensure I/O cache and other whatnots were empty * All filesystems stock UFS2 + SU (root is non-SU) * All filesystems had tunefs -t enable applied to them * powerd(8) in use, with two rc.conf variables (per CPU spec): performance_cx_lowest="C2" economy_cx_lowest="C2" * loader.conf kern.maxdsiz="2560M" kern.dfldsiz="2560M" kern.maxssiz="256M" ahci_load="yes" hint.p4tcc.0.disabled="1" hint.acpi_throttle.0.disabled="1" vfs.zfs.arc_max="5120M" * make.conf CPUTYPE?=core2 * src.conf WITHOUT_INET6=true WITHOUT_IPFILTER=true WITHOUT_LIB32=true WITHOUT_KERBEROS=true WITHOUT_PAM_SUPPORT=true WITHOUT_PROFILE=true WITHOUT_SENDMAIL=true * kernel configuration - note: between kernel builds, config was changed to either use SCHED_4BSD or SCHED_ULE respectively. cpu HAMMER ident GENERIC makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols options SCHED_4BSD # Classic BSD scheduler #options SCHED_ULE # ULE scheduler options PREEMPTION # Enable kernel thread preemption options INET # InterNETworking options FFS # Berkeley Fast Filesystem options SOFTUPDATES # Enable FFS soft updates support options UFS_ACL # Support for access control lists options UFS_DIRHASH # Improve performance on big directories options UFS_GJOURNAL # Enable gjournal-based UFS journaling options MD_ROOT # MD is a potential root device options NFSCLIENT # Network Filesystem Client options NFSSERVER # Network Filesystem Server options NFSLOCKD # Network Lock Manager options NFS_ROOT # NFS usable as /, requires NFSCLIENT options MSDOSFS # MSDOS Filesystem options CD9660 # ISO 9660 Filesystem options PROCFS # Process filesystem (requires PSEUDOFS) options PSEUDOFS # Pseudo-filesystem framework options GEOM_PART_GPT # GUID Partition Tables. options GEOM_LABEL # Provides labelization options COMPAT_43TTY # BSD 4.3 TTY compat (sgtty) options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI options KTRACE # ktrace(1) support options STACK # stack(9) support options SYSVSHM # SYSV-style shared memory options SYSVMSG # SYSV-style message queues options SYSVSEM # SYSV-style semaphores options P1003_1B_SEMAPHORES # POSIX-style semaphores options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions options PRINTF_BUFR_SIZE=128 # Prevent printf output being interspersed. options KBD_INSTALL_CDEV # install a CDEV entry in /dev options HWPMC_HOOKS # Necessary kernel hooks for hwpmc(4) options AUDIT # Security event auditing options MAC # TrustedBSD MAC Framework options FLOWTABLE # per-cpu routing cache #options KDTRACE_FRAME # Ensure frames are compiled in #options KDTRACE_HOOKS # Kernel DTrace hooks options INCLUDE_CONFIG_FILE # Include this file in kernel # Make an SMP-capable kernel by default options SMP # Symmetric MultiProcessor Kernel # Debugging options options BREAK_TO_DEBUGGER # Sending a serial BREAK drops to DDB options ALT_BREAK_TO_DEBUGGER # Permit <CR>~<Ctrl-b> to drop to DDB options KDB # Enable kernel debugger support options KDB_TRACE # Print stack trace automatically on panic options DDB # Support DDB options DDB_NUMSYM # Print numeric value of symbols options GDB # Support remote GDB # CPU frequency control device cpufreq # Bus support. device acpi device pci # Floppy drives device fdc # ATA and ATAPI devices # NOTE: "device ata" is missing because we use the Modular ATA core # to only include the ATA-related drivers we need (e.g. AHCI). device atadisk # ATA disk drives device ataraid # ATA RAID drives device atapicd # ATAPI CDROM drives options ATA_STATIC_ID # Static device numbering # Modular ATA device atacore # Core ATA functionality device ataisa # ISA bus support device atapci # PCI bus support; only generic chipset support device ataahci # AHCI SATA device ataintel # Intel # SCSI peripherals device scbus # SCSI bus (required for SCSI) device da # Direct Access (disks) device cd # CD device pass # Passthrough device (direct SCSI access) device ses # SCSI Environmental Services (and SAF-TE) options CAMDEBUG # CAM debugging (camcontrol debug) # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc # AT keyboard controller device atkbd # AT keyboard device psm # PS/2 mouse device kbdmux # keyboard multiplexer device vga # VGA video card driver device splash # Splash screen and screen saver support # syscons is the default console driver, resembling an SCO console device sc device agp # support several AGP chipsets # Serial (COM) ports device uart # Generic UART driver # PCI Ethernet NICs. device em # Intel PRO/1000 Gigabit Ethernet Family # Wireless NIC cards device wlan # 802.11 support options IEEE80211_DEBUG # enable debug msgs options IEEE80211_AMPDU_AGE # age frames in AMPDU reorder q's device wlan_wep # 802.11 WEP support device wlan_ccmp # 802.11 CCMP support device wlan_tkip # 802.11 TKIP support device wlan_amrr # AMRR transmit rate control algorithm device wlan_acl # MAC Access Control List support # Pseudo devices. device loop # Network loopback device random # Entropy device device ether # Ethernet support device pty # BSD-style compatibility pseudo ttys device md # Memory "disks" device gif # IPv6 and IPv4 tunneling device faith # IPv6-to-IPv4 relaying (translation) device firmware # firmware assist module # The `bpf' device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! # Note that 'bpf' is required for DHCP. device bpf # Berkeley packet filter # USB support device uhci # UHCI PCI->USB interface device ohci # OHCI PCI->USB interface device ehci # EHCI PCI->USB interface (USB 2.0) device usb # USB Bus (required) #device udbp # USB Double Bulk Pipe devices device uhid # "Human Interface Devices" device ukbd # Keyboard device umass # Disks/Mass storage - Requires scbus and da device ums # Mouse # Intel Core/Core2Duo CPU temperature monitoring driver device coretemp # SMBus support, needed for bsdhwmon device smbus device smb device ichsmb # Intel ICH hardware watchdog support device ichwd # pf ALTQ support options ALTQ options ALTQ_CBQ # Class Bases Queueing options ALTQ_RED # Random Early Detection options ALTQ_RIO # RED In/Out options ALTQ_HFSC # Hierarchical Packet Scheduler options ALTQ_CDNR # Traffic conditioner options ALTQ_PRIQ # Priority Queueing options ALTQ_NOPCC # Required for SMP buildReceived on Tue Dec 13 2011 - 06:36:18 UTC
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