== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:03:12 (1756810992)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.06621 s, 13.0 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-ffff9feacb6b2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.479164
Iter 1/10: OSS cache speed: 0.60549
Iter 1/10: ladvise speed: 0.550547
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.538316
Iter 2/10: OSS cache speed: 0.611401
Iter 2/10: ladvise speed: 0.629571
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.582585
Iter 3/10: OSS cache speed: 0.596169
Iter 3/10: ladvise speed: 0.562957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.660901
Iter 4/10: OSS cache speed: 0.720208
Iter 4/10: ladvise speed: 0.842575
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.815326
Iter 5/10: OSS cache speed: 0.888604
Iter 5/10: ladvise speed: 0.961614
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.992329
Iter 6/10: OSS cache speed: 1.28157
Iter 6/10: ladvise speed: 1.22983
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.00393
Iter 7/10: OSS cache speed: 1.30707
Iter 7/10: ladvise speed: 1.6213
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.37876
Iter 8/10: OSS cache speed: 1.5432
Iter 8/10: ladvise speed: 1.04871
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.00857
Iter 9/10: OSS cache speed: 1.3073
Iter 9/10: ladvise speed: 1.7817
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.06265
Iter 10/10: OSS cache speed: 1.9177
Iter 10/10: ladvise speed: 2.369
Average uncached read: .95
Average speedup with OSS cached read:  1.07 = +12%
Average speedup with ladvise willread:  1.15 = +21%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0