== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:36:53 (1783352213)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.18459 s, 17.0 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-ffffa07750a01000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.793808
Iter 1/10: OSS cache speed: 1.18774
Iter 1/10: ladvise speed: 1.14661
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.22019
Iter 2/10: OSS cache speed: 1.22796
Iter 2/10: ladvise speed: 1.50287
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.33482
Iter 3/10: OSS cache speed: 1.45477
Iter 3/10: ladvise speed: 1.95825
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.45073
Iter 4/10: OSS cache speed: 1.78118
Iter 4/10: ladvise speed: 1.95984
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.94684
Iter 5/10: OSS cache speed: 2.24389
Iter 5/10: ladvise speed: 2.30222
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.05216
Iter 6/10: OSS cache speed: 2.08519
Iter 6/10: ladvise speed: 2.36941
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.22332
Iter 7/10: OSS cache speed: 2.41187
Iter 7/10: ladvise speed: 2.30874
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.21058
Iter 8/10: OSS cache speed: 2.41151
Iter 8/10: ladvise speed: 2.41005
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.35221
Iter 9/10: OSS cache speed: 2.54165
Iter 9/10: ladvise speed: 2.31976
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.16732
Iter 10/10: OSS cache speed: 2.30971
Iter 10/10: ladvise speed: 2.19044
Average uncached read: 1.77
Average speedup with OSS cached read:  1.96 = +10%
Average speedup with ladvise willread:  2.04 = +15%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0