== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:02:47 (1758808967)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.93312 s, 17.7 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-ffff8cdb84355000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.12985
Iter 1/10: OSS cache speed: 2.09047
Iter 1/10: ladvise speed: 2.06073
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03202
Iter 2/10: OSS cache speed: 2.13854
Iter 2/10: ladvise speed: 2.18337
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.26243
Iter 3/10: OSS cache speed: 2.10799
Iter 3/10: ladvise speed: 2.04885
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.09912
Iter 4/10: OSS cache speed: 2.12561
Iter 4/10: ladvise speed: 2.13584
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.35747
Iter 5/10: OSS cache speed: 2.25886
Iter 5/10: ladvise speed: 2.15727
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09734
Iter 6/10: OSS cache speed: 2.12725
Iter 6/10: ladvise speed: 2.12683
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.1374
Iter 7/10: OSS cache speed: 2.22027
Iter 7/10: ladvise speed: 1.58067
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.1226
Iter 8/10: OSS cache speed: 0.993028
Iter 8/10: ladvise speed: 0.644038
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.686626
Iter 9/10: OSS cache speed: 0.572152
Iter 9/10: ladvise speed: 0.594907
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.6254
Iter 10/10: OSS cache speed: 0.702273
Iter 10/10: ladvise speed: 0.841928
Average uncached read: 1.85
Average speedup with OSS cached read:  1.73 = +-6%
Average speedup with ladvise willread:  1.63 = +-11%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0