== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:16:28 (1786943788)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.54268 s, 12.3 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-ffff9ddd10294000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.499711
Iter 1/10: OSS cache speed: 0.499519
Iter 1/10: ladvise speed: 0.536335
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.535741
Iter 2/10: OSS cache speed: 0.570491
Iter 2/10: ladvise speed: 0.660046
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.67256
Iter 3/10: OSS cache speed: 0.59267
Iter 3/10: ladvise speed: 0.688262
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.337038
Iter 4/10: OSS cache speed: 0.491458
Iter 4/10: ladvise speed: 0.479239
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.446977
Iter 5/10: OSS cache speed: 0.455164
Iter 5/10: ladvise speed: 0.672677
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.780042
Iter 6/10: OSS cache speed: 0.766889
Iter 6/10: ladvise speed: 0.786055
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.779322
Iter 7/10: OSS cache speed: 0.888794
Iter 7/10: ladvise speed: 0.777736
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.857662
Iter 8/10: OSS cache speed: 0.874721
Iter 8/10: ladvise speed: 0.747991
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.802453
Iter 9/10: OSS cache speed: 0.712473
Iter 9/10: ladvise speed: 0.296219
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.29254
Iter 10/10: OSS cache speed: 0.407514
Iter 10/10: ladvise speed: 0.392081
Average uncached read: .60
Average speedup with OSS cached read:  .62 = +3%
Average speedup with ladvise willread:  .60 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0