== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:14:48 (1778289288)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0944 s, 9.5 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff948f83eb1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365481
Iter 1/10: OSS cache speed: 0.397774
Iter 1/10: ladvise speed: 0.352594
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.336452
Iter 2/10: OSS cache speed: 0.373136
Iter 2/10: ladvise speed: 0.408038
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.41637
Iter 3/10: OSS cache speed: 0.46254
Iter 3/10: ladvise speed: 0.459213
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.456463
Iter 4/10: OSS cache speed: 0.493849
Iter 4/10: ladvise speed: 0.535752
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.596837
Iter 5/10: OSS cache speed: 0.659293
Iter 5/10: ladvise speed: 0.768586
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.731232
Iter 6/10: OSS cache speed: 0.707678
Iter 6/10: ladvise speed: 0.768634
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.801586
Iter 7/10: OSS cache speed: 0.787741
Iter 7/10: ladvise speed: 0.839848
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.947639
Iter 8/10: OSS cache speed: 1.05264
Iter 8/10: ladvise speed: 0.951232
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.07225
Iter 9/10: OSS cache speed: 1.19257
Iter 9/10: ladvise speed: 1.42786
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.30805
Iter 10/10: OSS cache speed: 1.39614
Iter 10/10: ladvise speed: 1.38675
Average uncached read: .70
Average speedup with OSS cached read:  .75 = +7%
Average speedup with ladvise willread:  .78 = +11%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0