at present /proc/stat reports in the "page" line the number of calls
made to make_request. As the number of 512 bytes records belonging to one
request varies ( 2 for a normal harddisk, 4 for a SCSI CDROM,
probably 8 for a md-device), this accumulated number doesn't reflect a
real hard number tranfered to and from the media. I propose counting
the number of records instead. This would require a change to xosview,
or otherwise the numbers for normal disk accesses would off by a
factor of two.
Any objections
Bye
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de
Free Software: If you contribute nothing, expect nothing
--
--- linux/drivers/block/ll_rw_blk.c~ Fri Mar 12 08:20:14 1999 +++ linux/drivers/block/ll_rw_blk.c Fri May 7 19:17:32 1999 @@ -415,7 +418,7 @@ case READ: if (buffer_uptodate(bh)) /* Hmmph! Already have it */ goto end_io; - kstat.pgpgin++; + kstat.pgpgin+=count; max_req = NR_REQUEST; /* reads take precedence */ break; case WRITEA: @@ -429,7 +432,7 @@ * as they take precedence. The last third of the * requests are only for reads. */ - kstat.pgpgout++; + kstat.pgpgout+=count; max_req = (NR_REQUEST * 2) / 3; break; default:
--- xosview-1.7.1/linux/diskmeter.cc.orig Thu Feb 25 18:12:41 1999 +++ xosview-1.7.1/linux/diskmeter.cc Fri May 7 20:37:18 1999 @@ -73,8 +73,8 @@ // assume each "unit" is 1k. // This is true for ext2, but seems to be 512 bytes // for vfat and 2k for cdroms - unsigned long int read_curr = one * 1024; - unsigned long int write_curr = two * 1024; + unsigned long int read_curr = one * 512; + unsigned long int write_curr = two * 512; fields_[0] = ((read_curr - read_prev_) * 1e6) / IntervalTimeInMicrosecs(); fields_[1] = ((write_curr - write_prev_) * 1e6) /
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