== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:48:53 (1787575733)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9893 s, 7.0 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-ffff889504fb3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348372
Iter 1/10: OSS cache speed: 0.296532
Iter 1/10: ladvise speed: 0.329893
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.299442
Iter 2/10: OSS cache speed: 0.332971
Iter 2/10: ladvise speed: 0.324745
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.342937
Iter 3/10: OSS cache speed: 0.338037
Iter 3/10: ladvise speed: 0.304015
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.299127
Iter 4/10: OSS cache speed: 0.312106
Iter 4/10: ladvise speed: 0.370976
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.36012
Iter 5/10: OSS cache speed: 0.364578
Iter 5/10: ladvise speed: 0.276404
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.324208
Iter 6/10: OSS cache speed: 0.342813
Iter 6/10: ladvise speed: 0.329539
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.321185
Iter 7/10: OSS cache speed: 0.316038
Iter 7/10: ladvise speed: 0.283033
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.304195
Iter 8/10: OSS cache speed: 0.367629
Iter 8/10: ladvise speed: 0.317343
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.327259
Iter 9/10: OSS cache speed: 0.284013
Iter 9/10: ladvise speed: 0.309133
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.327754
Iter 10/10: OSS cache speed: 0.355548
Iter 10/10: ladvise speed: 0.302359
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0