== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:04:58 (1718852698)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.52921 s, 41.5 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-ffff8800b6648800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.00934
Iter 1/10: OSS cache speed: 2.0531
Iter 1/10: ladvise speed: 1.68698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.37783
Iter 2/10: OSS cache speed: 2.05348
Iter 2/10: ladvise speed: 1.60425
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.92214
Iter 3/10: OSS cache speed: 2.26228
Iter 3/10: ladvise speed: 1.86597
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.64572
Iter 4/10: OSS cache speed: 2.62015
Iter 4/10: ladvise speed: 3.01596
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.47606
Iter 5/10: OSS cache speed: 2.3616
Iter 5/10: ladvise speed: 2.24615
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.91947
Iter 6/10: OSS cache speed: 2.16649
Iter 6/10: ladvise speed: 2.22312
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.4965
Iter 7/10: OSS cache speed: 2.23371
Iter 7/10: ladvise speed: 2.3697
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.49501
Iter 8/10: OSS cache speed: 2.30172
Iter 8/10: ladvise speed: 1.60628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.12663
Iter 9/10: OSS cache speed: 2.16068
Iter 9/10: ladvise speed: 2.47938
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.31676
Iter 10/10: OSS cache speed: 2.54589
Iter 10/10: ladvise speed: 1.75102
Average uncached read: 2.17
Average speedup with OSS cached read: 2.27 = +4.60%
Average speedup with ladvise willread: 2.08 = +-4.14%
Speedup with OSS cached read less than 20%, got 4.60%. Skipping ladvise willread check.
fail_loc=0