== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:26:00 (1744129560)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.49884 s, 42.0 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-ffff88012a5e9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.89086
Iter 1/10: OSS cache speed: 3.20081
Iter 1/10: ladvise speed: 2.95117
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.7437
Iter 2/10: OSS cache speed: 3.01282
Iter 2/10: ladvise speed: 2.90404
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.79619
Iter 3/10: OSS cache speed: 3.18707
Iter 3/10: ladvise speed: 3.23156
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.95671
Iter 4/10: OSS cache speed: 3.34395
Iter 4/10: ladvise speed: 3.46077
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.07177
Iter 5/10: OSS cache speed: 3.45113
Iter 5/10: ladvise speed: 3.38673
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.99302
Iter 6/10: OSS cache speed: 2.18747
Iter 6/10: ladvise speed: 2.17773
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.35937
Iter 7/10: OSS cache speed: 2.7286
Iter 7/10: ladvise speed: 2.97359
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.52442
Iter 8/10: OSS cache speed: 3.03216
Iter 8/10: ladvise speed: 2.82303
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.52403
Iter 9/10: OSS cache speed: 2.84977
Iter 9/10: ladvise speed: 2.9944
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.70967
Iter 10/10: OSS cache speed: 1.3153
Iter 10/10: ladvise speed: 1.79829
Average uncached read: 2.65
Average speedup with OSS cached read:  2.83 = +6%
Average speedup with ladvise willread:  2.87 = +8%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0