== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:46:03 (1783518363)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.09948 s, 17.2 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-ffff8c95591dc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.859755
Iter 1/10: OSS cache speed: 1.1467
Iter 1/10: ladvise speed: 1.27182
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.29151
Iter 2/10: OSS cache speed: 1.15083
Iter 2/10: ladvise speed: 1.42619
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.60332
Iter 3/10: OSS cache speed: 1.90963
Iter 3/10: ladvise speed: 1.84046
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.78584
Iter 4/10: OSS cache speed: 1.98787
Iter 4/10: ladvise speed: 2.19816
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.13381
Iter 5/10: OSS cache speed: 1.80595
Iter 5/10: ladvise speed: 2.10633
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.08644
Iter 6/10: OSS cache speed: 2.17063
Iter 6/10: ladvise speed: 2.09925
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.09944
Iter 7/10: OSS cache speed: 2.05571
Iter 7/10: ladvise speed: 2.02707
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02305
Iter 8/10: OSS cache speed: 2.03669
Iter 8/10: ladvise speed: 2.10648
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.09262
Iter 9/10: OSS cache speed: 2.00522
Iter 9/10: ladvise speed: 1.2231
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.78079
Iter 10/10: OSS cache speed: 1.11833
Iter 10/10: ladvise speed: 1.97272
Average uncached read: 1.77
Average speedup with OSS cached read:  1.73 = +-2%
Average speedup with ladvise willread:  1.82 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0