== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:46:03 (1787388363)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6077 s, 7.2 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-ffff9fedc904b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.312184
Iter 1/10: OSS cache speed: 0.277821
Iter 1/10: ladvise speed: 0.283846
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.255471
Iter 2/10: OSS cache speed: 0.270196
Iter 2/10: ladvise speed: 0.283754
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.33278
Iter 3/10: OSS cache speed: 0.308248
Iter 3/10: ladvise speed: 0.274887
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.276259
Iter 4/10: OSS cache speed: 0.305601
Iter 4/10: ladvise speed: 0.289358
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.298031
Iter 5/10: OSS cache speed: 0.286733
Iter 5/10: ladvise speed: 0.306453
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.306236
Iter 6/10: OSS cache speed: 0.241707
Iter 6/10: ladvise speed: 0.244513
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.259688
Iter 7/10: OSS cache speed: 0.25124
Iter 7/10: ladvise speed: 0.253079
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.248046
Iter 8/10: OSS cache speed: 0.249939
Iter 8/10: ladvise speed: 0.265925
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.299095
Iter 9/10: OSS cache speed: 0.293079
Iter 9/10: ladvise speed: 0.312167
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317101
Iter 10/10: OSS cache speed: 0.320933
Iter 10/10: ladvise speed: 0.291651
Average uncached read: .29
Average speedup with OSS cached read:  .28 = +-3%
Average speedup with ladvise willread:  .28 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0