Bump disk util stats from 32 to 64-bit values
Robert reports:
A long run can result in wrapping in the disk stats
(ios, merge, ticks, in_queue).
In this example, there were 212,245,615,134 read IOs
(that is from uint64_t total_io_u[3]):
read : io=101207GB, bw=491309KB/s, iops=982618, runt=216000016msec
cpu : usr=0.09%, sys=4.33%, ctx=
152784302066, majf=0, minf=2928
IO depths : 1=0.0%, 2=0.0%, 4=0.0%, 8=0.5%, 16=0.5%, 32=1.0%, >=64=1.0%
submit : 0=0.0%, 4=18.0%, 8=6.6%, 16=8.5%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=0.0%, 8=0.0%, 16=15.0%, 32=0.1%, 64=0.1%, >=64=0.1%
issued : total=r=
212245615134/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=96
Run status group 0 (all jobs):
READ: io=101207GB, aggrb=491309KB/s, minb=491309KB/s, maxb=491309KB/s, mint=216000016msec, maxt=216000016msec
All the disk stats, however, wrap at ios=4,294,967,295 (32 bit).
In this case it caught sdi falling a bit behind the others,
but all of them have wrapped multiple times.
Disk stats (read/write):
sdb: ios=
796157304/0, merge=0/0, ticks=
722039638/0, in_queue=
735284999, util=100.00%
sdc: ios=
725235994/0, merge=0/0, ticks=
725893305/0, in_queue=
738790349, util=100.00%
sdd: ios=
722370867/0, merge=0/0, ticks=
724540972/0, in_queue=
738926102, util=100.00%
sde: ios=
722490025/0, merge=0/0, ticks=
724775894/0, in_queue=
745581851, util=100.00%
sdf: ios=
719665329/0, merge=0/0, ticks=
724281840/0, in_queue=
740201203, util=100.00%
sdg: ios=
721386377/0, merge=0/0, ticks=
725529483/0, in_queue=
740729310, util=100.00%
sdh: ios=
720461888/0, merge=0/0, ticks=
724759222/0, in_queue=
741212131, util=100.00%
sdi: ios=
3280272329/0, merge=0/0, ticks=
3337080572/0, in_queue=
3340290775, util=81.57%
sdj: ios=
717395167/0, merge=0/0, ticks=
723762993/0, in_queue=
739136654, util=100.00%
sdk: ios=
824804416/0, merge=0/0, ticks=
722973383/0, in_queue=
734915061, util=100.00%
sdl: ios=
787317365/0, merge=0/0, ticks=
720963594/0, in_queue=
736506238, util=100.00%
sdm: ios=
791112845/0, merge=0/0, ticks=
723371287/0, in_queue=
745590636, util=100.00%
sdn: ios=
786009870/0, merge=0/0, ticks=
721111447/0, in_queue=
733786474, util=100.00%
sdo: ios=
787226466/0, merge=0/0, ticks=
722200707/0, in_queue=
737673635, util=100.00%
sdp: ios=
789062478/0, merge=0/0, ticks=
723648481/0, in_queue=
737820918, util=100.00%
sdq: ios=
786121713/0, merge=0/0, ticks=
722203635/0, in_queue=
752578258, util=100.00%
These structures are the reason:
struct disk_util_stats {
uint32_t ios[2];
uint32_t merges[2];
uint64_t sectors[2];
uint32_t ticks[2];
uint32_t io_ticks;
uint32_t time_in_queue;
uint64_t msec;
};
struct disk_util_agg {
uint32_t ios[2];
uint32_t merges[2];
uint64_t sectors[2];
uint32_t ticks[2];
uint32_t io_ticks;
uint32_t time_in_queue;
uint32_t slavecount;
fio_fp64_t max_util;
};
Signed-off-by: Jens Axboe <axboe@fb.com>