On Tue, Sep 03, 2013 at 10:46:37PM +0200, Rolf Fokkens wrote: > Hi, > > bcache-status renders some weird output: > > - "Total Cache Used" and "Total Cache Unused" don't always add up to > "Total Cache Size" Yeah... I calculate total cache size, then cache-used = cache-size * whatever percentage bcache reports. It won't add up exactly due to rounding errors. 0.999 -> 1.00. That's rather a lot, really. > - "Dirty Data" is -6 MB? I think this was fixed in 3.11. --D > > Seems like bugs to me. Details below. > > Rolf > > [root@localhost bcache]# bcache-status -s > --- bcache --- > UUID c318c0b2-0b69-4f66-a729-23b82a9d0e91 > Block Size 0.00KiB > Bucket Size 512.00KiB > Congested? False > Read Congestion 2.0ms > Write Congestion 20.0ms > Total Cache Size 1.00GiB > Total Cache Used 20.00MiB (1%) > Total Cache Unused 1.00GiB (99%) > Dirty Data 0B (0%) > Evictable Cache 1.00GiB (100%) > Replacement Policy [lru] fifo random > Cache Mode [writethrough] writeback writearound none > Total Hits 122 (100%) > Total Misses 0 > Total Bypass Hits 0 > Total Bypass Misses 0 > Total Bypassed 0B > --- Backing Device --- > Device File /dev/sda3 (8:3) > bcache Device File /dev/bcache1 (252:1) > Size 7.00GiB > Cache Mode [writethrough] writeback writearound none > Readahead 0 > Sequential Cutoff 4.00MiB > Merge sequential? True > State clean > Writeback? True > Dirty Data 0B > Total Hits 122 (100%) > Total Misses 0 > Total Bypass Hits 0 > Total Bypass Misses 0 > Total Bypassed 0B > --- Cache Device --- > Device File /dev/sdb1 (8:17) > Size 1.00GiB > Block Size 0.00KiB > Bucket Size 512.00KiB > Replacement Policy [lru] fifo random > Discard? False > I/O Errors 0 > Metadata Written 1.00KiB > Data Written 0B > Buckets 4094 > Cache Used 20.00MiB (1%) > Cache Unused 1.00GiB (99%) > --- bcache --- > UUID d07cd9a1-6211-4bba-bc37-a8ba8858ef4d > Block Size 0.00KiB > Bucket Size 512.00KiB > Congested? False > Read Congestion 2.0ms > Write Congestion 20.0ms > Total Cache Size 1.00GiB > Total Cache Used 204.00MiB (10%) > Total Cache Unused 1.00GiB (90%) > Dirty Data 0B (0%) > Evictable Cache 1.00GiB (100%) > Replacement Policy [lru] fifo random > Cache Mode writethrough [writeback] writearound none > Total Hits 1365 (81%) > Total Misses 318 > Total Bypass Hits 3191 (100%) > Total Bypass Misses 0 > Total Bypassed 46.00MiB > --- Backing Device --- > Device File /dev/sdc1 (8:33) > bcache Device File /dev/bcache0 (252:0) > Size 19.00GiB > Cache Mode writethrough [writeback] writearound none > Readahead 0 > Sequential Cutoff 0B > Merge sequential? True > State dirty > Writeback? True > Dirty Data -6.00MiB > Total Hits 1365 (81%) > Total Misses 318 > Total Bypass Hits 3191 (100%) > Total Bypass Misses 0 > Total Bypassed 46.00MiB > --- Cache Device --- > Device File /dev/sdd1 (8:49) > Size 1.00GiB > Block Size 0.00KiB > Bucket Size 512.00KiB > Replacement Policy [lru] fifo random > Discard? False > I/O Errors 0 > Metadata Written 281.00KiB > Data Written 18.00MiB > Buckets 4094 > Cache Used 204.00MiB (10%) > Cache Unused 1.00GiB (90%) > [root@localhost bcache]# > -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
