Messages in this thread |  | | Date | Sun, 26 May 1996 16:43:53 +0100 (GMT+0100) | From | Ingo Molnar <> | Subject | Re: IDE disk speed 5% slower in 1.99.7 |
| |
On Sat, 25 May 1996 gs@sismosr.com.ar wrote:
> To help me decide whether to include /dev/random in my kernel I wanted to > measure how it affected disk access speed. To do it I ran hdparm -t on my > IDE drive with a freshly booted computer that was otherwise idle. > The speed increase obtained by removing /dev/random from the kernel was > too low to distinguish from measurement error but when I performed the > same experiment running 1.2.13 I got a 5% speed improvement.
thats probably due to the buffer cache code change. (using a unified buffer cache for most data).
the second value in "hdparm -t" shows the "raw buffering throughput". This is now a bit slower. This change shows up in the "summary value" too.
-- mingo
|  |