== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:33:55 (1758735235)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.22828 s, 16.8 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-ffff988b06868000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.68305
Iter 1/10: OSS cache speed: 1.71871
Iter 1/10: ladvise speed: 1.60102
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88009
Iter 2/10: OSS cache speed: 1.73799
Iter 2/10: ladvise speed: 2.00123
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.97773
Iter 3/10: OSS cache speed: 2.09225
Iter 3/10: ladvise speed: 2.08839
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.20888
Iter 4/10: OSS cache speed: 2.16497
Iter 4/10: ladvise speed: 2.09834
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.11251
Iter 5/10: OSS cache speed: 2.07539
Iter 5/10: ladvise speed: 2.14494
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.16858
Iter 6/10: OSS cache speed: 2.08926
Iter 6/10: ladvise speed: 1.84672
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.13862
Iter 7/10: OSS cache speed: 1.99172
Iter 7/10: ladvise speed: 1.17831
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.421846
Iter 8/10: OSS cache speed: 0.563045
Iter 8/10: ladvise speed: 0.739698
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.675586
Iter 9/10: OSS cache speed: 0.7333
Iter 9/10: ladvise speed: 0.703709
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.357617
Iter 10/10: OSS cache speed: 0.540282
Iter 10/10: ladvise speed: 0.54073
Average uncached read: 1.56
Average speedup with OSS cached read:  1.57 = +0%
Average speedup with ladvise willread:  1.49 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0