The data shown in the above graph was taken around April 8-10, 2000:

FreeBSD 5.0-CURRENT #5: Thu Apr  6 18:58:10 MDT 2000
    root@Elmer.foo.com:/usr/src/sys/compile/LOCAL_MP

CPU: Pentium III Xeon (550.15-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x673  Stepping = 3
  Features=0x383fbff
real memory  = 1073717248 (1048552K bytes)
avail memory = 1041149952 (1016748K bytes)

FreeBSD/SMP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  3, version: 0x00040011, at 0xfee00000
 cpu1 (AP):  apic id:  0, version: 0x00040011, at 0xfee00000
 cpu2 (AP):  apic id:  1, version: 0x00040011, at 0xfee00000
 cpu3 (AP):  apic id:  2, version: 0x00040011, at 0xfee00000
 io0 (APIC): apic id:  4, version: 0x003f0013, at 0xfec00000
ahc0: < Adaptec 2940 Ultra SCSI adapter >

da0: < SEAGATE ST34502LW 0004 > Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 4340MB (8888924 512 byte sectors: 255H 63S/T 553C)
da1: < SEAGATE ST34502LW 0004 > Fixed Direct Access SCSI-2 device 
da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 4340MB (8888924 512 byte sectors: 255H 63S/T 553C)
da2: < SEAGATE ST34502LW 0004 > Fixed Direct Access SCSI-2 device 
da2: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da2: 4340MB (8888924 512 byte sectors: 255H 63S/T 553C)

Notes on the 4 cpu / 3 spindle data:

 data taken at '-j8', '-j16', 'j32'.

 environment:
	running from shell inside emacs & X11R6.

 files systems:
	/dev/da0s1f on /usr (ufs, local, soft-updates)
	/dev/da2s1e on /usr/src (ufs, local, noatime)
	/dev/da1s1e on /usr/obj (ufs, asynchronous, local, noatime)

Notes on the 4 cpu / soft updates data:

 data taken at '-j8', '-j16', 'j32'.

 environment:
	running from shell inside emacs & X11R6.

 files systems:
	/dev/da0s1f on /usr (ufs, local, soft-updates)
	/dev/da2s1e on /usr/src (ufs, local, noatime, soft-updates)
	/dev/da1s1e on /usr/obj (ufs, local, noatime, soft-updates)

Notes on the 2 cpu / memory file system data:

 data taken at '-j16' only.

 environment:
	running from shell inside emacs & X11R6.
	using 2 cpus (ie kernel.2WAY)

 files systems:
	/dev/da0s1f on /usr (ufs, local, soft-updates)

	mfs:76803 on /usr/src (mfs, asynchronous, local)
	mfs:76805 on /usr/obj (mfs, asynchronous, local)

Notes on the 3 cpu / memory file system data:

 data taken at '-j16' only.

 environment:
	running from shell inside emacs & X11R6.
	using 3 cpus (ie kernel.3WAY)

 files systems:
	/dev/da0s1f on /usr (ufs, local, soft-updates)

	mfs:76803 on /usr/src (mfs, asynchronous, local)
	mfs:76805 on /usr/obj (mfs, asynchronous, local)

Notes on the 4 cpu / memory file system data:

 data taken at '-j8', '-j16', 'j32'.

 environment:
	running from shell inside emacs & X11R6.

 files systems:
	/dev/da0s1f on /usr (ufs, local, soft-updates)

	mfs:76803 on /usr/src (mfs, asynchronous, local)
	mfs:76805 on /usr/obj (mfs, asynchronous, local)