Re: SYSENTER based syscalls patch, 2.1.105, RFC

Andrea Arcangeli (arcangeli@mbox.queen.it)
Thu, 18 Jun 1998 20:35:03 +0200 (CEST)


On Sat, 13 Jun 1998 mingo@hal.cobaltmicro.com wrote:

> [mingo@hal fastcall]$ ./fastcall
> (INT $0x80 based getpid(), got pid 497) latency:282 cycles
> (SYSENTER based getpid(), got pid 497) latency:138 cycles

andrea@dragon:~$ ./a.out
(INT $0x80 based getpid(), got pid 949) latency:115 cycles
Illegal Instruction
andrea@dragon:~$ ./a.out
(INT $0x80 based getpid(), got pid 950) latency:115 cycles
Illegal Instruction
[...]

On my 266 Mhz P5MMX I am going faster than your PII?!?! I am using a #SMP
(no-SMP ;-) kernel but this should not change nothing since the test is
done outside the kernel code...

Andrea[s] Arcangeli

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