== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:25:57 (1787034357)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0757 s, 8.0 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-ffff9b5fd15b4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374901
Iter 1/10: OSS cache speed: 0.322142
Iter 1/10: ladvise speed: 0.349962
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.4275
Iter 2/10: OSS cache speed: 0.411711
Iter 2/10: ladvise speed: 0.29383
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366819
Iter 3/10: OSS cache speed: 0.454613
Iter 3/10: ladvise speed: 0.408187
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.334441
Iter 4/10: OSS cache speed: 0.478319
Iter 4/10: ladvise speed: 0.412219
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.400551
Iter 5/10: OSS cache speed: 0.387711
Iter 5/10: ladvise speed: 0.474156
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.45202
Iter 6/10: OSS cache speed: 0.412096
Iter 6/10: ladvise speed: 0.516953
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.459241
Iter 7/10: OSS cache speed: 0.38837
Iter 7/10: ladvise speed: 0.44433
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.483439
Iter 8/10: OSS cache speed: 0.48281
Iter 8/10: ladvise speed: 0.418579
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.505199
Iter 9/10: OSS cache speed: 0.543671
Iter 9/10: ladvise speed: 0.516529
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.425365
Iter 10/10: OSS cache speed: 0.525431
Iter 10/10: ladvise speed: 0.489456
Average uncached read: .42
Average speedup with OSS cached read:  .44 = +4%
Average speedup with ladvise willread:  .43 = +2%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0