Tom Vier wrote: >On Tue, May 23, 2006 at 01:14:54PM -0700, Hans Reiser wrote: > > >>underlying FS can be improved. Performance results show that the new >>code consumes 40% less CPU when doing "dd bs=1MB ....." (your hardware, >>and whether the data is in cache, may vary this result). Note that this >>has only a small effect on elapsed time for most hardware. >> >> > >Write requests in linux are restricted to one page? > > > It may go to the kernel as a 64MB write, but VFS sends it to the FS as 64MB/4k separate 4k writes. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- References:
- [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- From: Hans Reiser <[email protected]>
- Re: [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- From: Tom Vier <[email protected]>
- [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- Prev by Date: Re: [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- Next by Date: Re: 4096 byte limit to /proc/PID/environ ?
- Previous by thread: Re: [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- Next by thread: Re: [PATCH] updated reiser4 - reduced cpu usage for writes by writing more than 4k at a time (has implications for generic write code and eventually for the IO layer)
- Index(es):
 |