Date: Sat, 01 May 1999 21:54:44 +0300 From: Maxim Sobolev <sobomax@altavista.net> To: current@freebsd.org Subject: Strange figures reported by i586_bzero... Message-ID: <372B4DF4.D30F3756@altavista.net>
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Following is piece of dmesg -v output of my recent kernel (take a look
at i586_bzero bandwith figures....
FreeBSD 4.0-CURRENT #1: Sat May 1 21:30:10 EEST 1999
Calibrating clock(s) ... TSC clock: 250536168 Hz, i8254 clock: 1193030
Hz
Timecounter "i8254" frequency 1193030 Hz
CPU: \^E (250.54-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x580 Stepping=0
Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>
Data TLB: 128 entries, 2-way associative
Instruction TLB: 64 entries, 1-way associative
L1 data cache: 32 kbytes, 32 bytes/line, 2 lines/tag, 2-way associative
L1 instruction cache: 32 kbytes, 32 bytes/line, 2 lines/tag, 2-way
associative
Write Allocate Enable Limit: 64M bytes
Write Allocate 15-16M bytes: Enable
Hardware Write Allocate Control: Disable
.....
npx0: <math processor> on motherboard
npx0: INT 16 interface
i586_bzero() bandwidth = -2111561183 bytes/sec
^^^^^^^^^^^^^^^^^^^^^^-
NEGASTIVE BANDWITH? IT'S INTERESTING!!!
bzero() bandwidth = 186046511 bytes/sec
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