== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:52:19 (1779871939)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1443 s, 8.6 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-ffff990145450800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.420642
Iter 1/10: OSS cache speed: 0.431917
Iter 1/10: ladvise speed: 0.394084
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.449591
Iter 2/10: OSS cache speed: 0.399417
Iter 2/10: ladvise speed: 0.331535
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.318273
Iter 3/10: OSS cache speed: 0.412562
Iter 3/10: ladvise speed: 0.357398
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.378566
Iter 4/10: OSS cache speed: 0.36175
Iter 4/10: ladvise speed: 0.47086
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.410862
Iter 5/10: OSS cache speed: 0.431214
Iter 5/10: ladvise speed: 0.478542
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.433845
Iter 6/10: OSS cache speed: 0.482812
Iter 6/10: ladvise speed: 0.481652
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.392287
Iter 7/10: OSS cache speed: 0.494256
Iter 7/10: ladvise speed: 0.398185
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.323668
Iter 8/10: OSS cache speed: 0.349626
Iter 8/10: ladvise speed: 0.435136
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.390764
Iter 9/10: OSS cache speed: 0.467369
Iter 9/10: ladvise speed: 0.5114
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.536019
Iter 10/10: OSS cache speed: 0.589824
Iter 10/10: ladvise speed: 0.57137
Average uncached read: .40
Average speedup with OSS cached read:  .44 = +10%
Average speedup with ladvise willread:  .44 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0