== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:01:02 (1763348462)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.75231 s, 10.8 MB/s
llite.lustre-ffff90f667d1a000.read_ahead_stats=clear
llite.lustre-ffff90f667d1a000.read_ahead_stats=
snapshot_time             1763348493.676978660 secs.nsecs
start_time                1763348476.394490214 secs.nsecs
elapsed_time              17.282488446 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          106 samples [pages]
failed_to_reach_end       2 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=224662: Sun Nov 16 22:13:22 2025
  read: IOPS=7, BW=7470KiB/s (7650kB/s)(5120MiB/701819msec)
    clat (msec): min=23, max=341, avg=136.57, stdev=45.41
     lat (msec): min=23, max=341, avg=136.58, stdev=45.42
    clat percentiles (msec):
     |  1.00th=[   72],  5.00th=[   81], 10.00th=[   87], 20.00th=[   97],
     | 30.00th=[  107], 40.00th=[  116], 50.00th=[  128], 60.00th=[  140],
     | 70.00th=[  155], 80.00th=[  174], 90.00th=[  203], 95.00th=[  224],
     | 99.00th=[  268], 99.50th=[  288], 99.90th=[  317], 99.95th=[  330],
     | 99.99th=[  342]
   bw (  KiB/s): min= 2015, max=14336, per=100.00%, avg=7501.74, stdev=2179.35, samples=1386
   iops        : min=    1, max=   14, avg= 6.66, stdev= 2.19, samples=1386
  lat (msec)   : 50=0.08%, 100=23.48%, 250=74.39%, 500=2.05%
  cpu          : usr=0.39%, sys=33.28%, ctx=25842, majf=7778, minf=1303210
  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=7470KiB/s (7650kB/s), 7470KiB/s-7470KiB/s (7650kB/s-7650kB/s), io=5120MiB (5369MB), run=701819-701819msec