== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:09:53 (1750180193)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.3636 s, 24.0 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-ffff8800b6d04000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.696795
Iter 1/10: OSS cache speed: 0.737445
Iter 1/10: ladvise speed: 0.662042
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.675572
Iter 2/10: OSS cache speed: 0.769181
Iter 2/10: ladvise speed: 0.745895
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.748276
Iter 3/10: OSS cache speed: 0.719767
Iter 3/10: ladvise speed: 0.721886
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.752877
Iter 4/10: OSS cache speed: 0.661125
Iter 4/10: ladvise speed: 0.680252
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.730577
Iter 5/10: OSS cache speed: 0.711673
Iter 5/10: ladvise speed: 0.651183
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.675083
Iter 6/10: OSS cache speed: 0.699844
Iter 6/10: ladvise speed: 0.805185
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.879293
Iter 7/10: OSS cache speed: 0.785409
Iter 7/10: ladvise speed: 0.679634
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.725722
Iter 8/10: OSS cache speed: 0.893218
Iter 8/10: ladvise speed: 0.836175
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.807821
Iter 9/10: OSS cache speed: 0.816154
Iter 9/10: ladvise speed: 0.774599
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.807706
Iter 10/10: OSS cache speed: 0.848402
Iter 10/10: ladvise speed: 0.723066
Average uncached read: .74
Average speedup with OSS cached read:  .76 = +2%
Average speedup with ladvise willread:  .72 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0