== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:16:17 (1790943377)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.7079 s, 6.3 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-ffff9d8802fbb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.31525
Iter 1/10: OSS cache speed: 0.350082
Iter 1/10: ladvise speed: 0.354149
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.261964
Iter 2/10: OSS cache speed: 0.294699
Iter 2/10: ladvise speed: 0.386803
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.360197
Iter 3/10: OSS cache speed: 0.273325
Iter 3/10: ladvise speed: 0.318082
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.3313
Iter 4/10: OSS cache speed: 0.333608
Iter 4/10: ladvise speed: 0.321772
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.309056
Iter 5/10: OSS cache speed: 0.327593
Iter 5/10: ladvise speed: 0.281738
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.287961
Iter 6/10: OSS cache speed: 0.351835
Iter 6/10: ladvise speed: 0.320671
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.354951
Iter 7/10: OSS cache speed: 0.395023
Iter 7/10: ladvise speed: 0.368749
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.40613
Iter 8/10: OSS cache speed: 0.413402
Iter 8/10: ladvise speed: 0.475242
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.436992
Iter 9/10: OSS cache speed: 0.417953
Iter 9/10: ladvise speed: 0.33062
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367358
Iter 10/10: OSS cache speed: 0.385915
Iter 10/10: ladvise speed: 0.402615
Average uncached read: .34
Average speedup with OSS cached read:  .35 = +2%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0