== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:31:54 (1743528714)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.56431 s, 40.9 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-ffff88012aacd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.86833
Iter 1/10: OSS cache speed: 3.13364
Iter 1/10: ladvise speed: 2.64205
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.46447
Iter 2/10: OSS cache speed: 3.15347
Iter 2/10: ladvise speed: 2.77369
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.694
Iter 3/10: OSS cache speed: 3.07458
Iter 3/10: ladvise speed: 2.87696
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.83703
Iter 4/10: OSS cache speed: 3.0189
Iter 4/10: ladvise speed: 3.00138
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.80033
Iter 5/10: OSS cache speed: 2.87291
Iter 5/10: ladvise speed: 3.2009
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.89503
Iter 6/10: OSS cache speed: 3.08584
Iter 6/10: ladvise speed: 3.08
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.81212
Iter 7/10: OSS cache speed: 3.15469
Iter 7/10: ladvise speed: 3.21892
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.91104
Iter 8/10: OSS cache speed: 3.18105
Iter 8/10: ladvise speed: 3.20806
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.8095
Iter 9/10: OSS cache speed: 2.95716
Iter 9/10: ladvise speed: 2.78921
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.76545
Iter 10/10: OSS cache speed: 2.71958
Iter 10/10: ladvise speed: 2.75937
Average uncached read: 2.78
Average speedup with OSS cached read: 3.03 = +8.99%
Average speedup with ladvise willread: 2.95 = +6.11%
Speedup with OSS cached read less than 20%, got 8.99%. Skipping ladvise willread check.
fail_loc=0