== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:13:17 (1763349197)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.56441 s, 11.0 MB/s
llite.lustre-ffff8dfcb2d5f800.read_ahead_stats=clear
llite.lustre-ffff8dfcb2d5f800.read_ahead_stats=
snapshot_time             1763349231.907655232 secs.nsecs
start_time                1763349212.329471398 secs.nsecs
elapsed_time              19.578183834 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          108 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=226368: Sun Nov 16 22:26:24 2025
  read: IOPS=6, BW=7030KiB/s (7199kB/s)(5120MiB/745774msec)
    clat (msec): min=24, max=456, avg=145.19, stdev=45.29
     lat (msec): min=24, max=456, avg=145.19, stdev=45.29
    clat percentiles (msec):
     |  1.00th=[   77],  5.00th=[   86], 10.00th=[   92], 20.00th=[  105],
     | 30.00th=[  116], 40.00th=[  128], 50.00th=[  140], 60.00th=[  150],
     | 70.00th=[  165], 80.00th=[  182], 90.00th=[  207], 95.00th=[  226],
     | 99.00th=[  271], 99.50th=[  288], 99.90th=[  347], 99.95th=[  380],
     | 99.99th=[  456]
   bw (  KiB/s): min= 1961, max=12288, per=100.00%, avg=7058.01, stdev=1914.43, samples=1470
   iops        : min=    1, max=   12, avg= 6.20, stdev= 1.94, samples=1470
  lat (msec)   : 50=0.14%, 100=16.60%, 250=80.78%, 500=2.48%
  cpu          : usr=0.37%, sys=30.10%, ctx=27358, majf=7715, minf=1303273
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=7030KiB/s (7199kB/s), 7030KiB/s-7030KiB/s (7199kB/s-7199kB/s), io=5120MiB (5369MB), run=745774-745774msec