== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:12:53 (1775833973)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.81877 s, 18.0 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-ffff8fca42f89800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.45202
Iter 1/10: OSS cache speed: 1.89452
Iter 1/10: ladvise speed: 2.31627
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.15199
Iter 2/10: OSS cache speed: 2.00412
Iter 2/10: ladvise speed: 1.93723
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.87249
Iter 3/10: OSS cache speed: 1.93133
Iter 3/10: ladvise speed: 1.97721
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.86711
Iter 4/10: OSS cache speed: 2.51502
Iter 4/10: ladvise speed: 2.61922
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.09515
Iter 5/10: OSS cache speed: 2.49015
Iter 5/10: ladvise speed: 2.19694
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.05796
Iter 6/10: OSS cache speed: 2.62702
Iter 6/10: ladvise speed: 2.35545
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.07687
Iter 7/10: OSS cache speed: 2.40513
Iter 7/10: ladvise speed: 2.27526
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.03637
Iter 8/10: OSS cache speed: 2.48701
Iter 8/10: ladvise speed: 2.41404
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.25207
Iter 9/10: OSS cache speed: 2.45722
Iter 9/10: ladvise speed: 2.4497
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.29187
Iter 10/10: OSS cache speed: 2.45924
Iter 10/10: ladvise speed: 2.38571
Average uncached read: 2.01
Average speedup with OSS cached read:  2.32 = +15%
Average speedup with ladvise willread:  2.29 = +13%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0