== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:54:43 (1783144483)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.67129 s, 15.7 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-ffff95ca47b5d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.827928
Iter 1/10: OSS cache speed: 0.687058
Iter 1/10: ladvise speed: 0.854939
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.01844
Iter 2/10: OSS cache speed: 1.1691
Iter 2/10: ladvise speed: 0.996541
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.07926
Iter 3/10: OSS cache speed: 1.04711
Iter 3/10: ladvise speed: 1.21225
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.993078
Iter 4/10: OSS cache speed: 1.11862
Iter 4/10: ladvise speed: 1.15792
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.38555
Iter 5/10: OSS cache speed: 1.32908
Iter 5/10: ladvise speed: 1.49076
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.38504
Iter 6/10: OSS cache speed: 1.25069
Iter 6/10: ladvise speed: 1.56674
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.6305
Iter 7/10: OSS cache speed: 1.47085
Iter 7/10: ladvise speed: 1.53323
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.62084
Iter 8/10: OSS cache speed: 1.69656
Iter 8/10: ladvise speed: 1.8815
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.0484
Iter 9/10: OSS cache speed: 1.86552
Iter 9/10: ladvise speed: 1.73431
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.83086
Iter 10/10: OSS cache speed: 1.85705
Iter 10/10: ladvise speed: 2.13439
Average uncached read: 1.38
Average speedup with OSS cached read:  1.34 = +-2%
Average speedup with ladvise willread:  1.45 = +5%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0