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- Remove hash functionality from slab in favor of direct lookups

Browse Source 
based of the spl_kmem_obj_t tacked on the end of each object.
  This actually isn't so back because we are now allocing large
  chunks for the slab and partitioning it ourselves.  So there's
  not a ton of wasted space.  We may suffer a performance hit
  however due to alignment issues.

- Remove remaining depenancies on the linux slab implementation.
  We're standing on our own now for better or worse.

- Rework slabs to be either kmem or vmem based.  If neither
  KMC_VMEM of KMC_KMEM are specified we make a decent guess
  about what will work best for their based on the object 
  size.  Additionally we provide a kmem_virt() function caller
  can use to see if they have a virtual or physical address.

- Minor fixups in the test suite.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@141 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
2008-07-01 03:28:54 +00:00
parent 1c3832576d
commit a1502d76ae
4 changed files with 241 additions and 358 deletions
Download Patch File Download Diff File Expand all files Collapse all files
modules/splat/splat-kmem.c
+32 -11
View File
@@ -371,18 +371,40 @@ out_free:
return rc;
}
/* Validate small object cache behavior for dynamic/kmem/vmem caches */
static int
splat_kmem_test5(struct file *file, void *arg)
{
return splat_kmem_cache_size_test(file, arg, SPLAT_KMEM_TEST5_NAME,
sizeof(kmem_cache_data_t) * 1, 0);
char *name = SPLAT_KMEM_TEST5_NAME;
int rc;
rc = splat_kmem_cache_size_test(file, arg, name, 128, 0);
if (rc)
return rc;
rc = splat_kmem_cache_size_test(file, arg, name, 128, KMC_KMEM);
if (rc)
return rc;
return splat_kmem_cache_size_test(file, arg, name, 128, KMC_VMEM);
}
/* Validate large object cache behavior for dynamic/kmem/vmem caches */
static int
splat_kmem_test6(struct file *file, void *arg)
{
return splat_kmem_cache_size_test(file, arg, SPLAT_KMEM_TEST6_NAME,
sizeof(kmem_cache_data_t) * 1024, 0);
char *name = SPLAT_KMEM_TEST6_NAME;
int rc;
rc = splat_kmem_cache_size_test(file, arg, name, 128 * 1024, 0);
if (rc)
return rc;
rc = splat_kmem_cache_size_test(file, arg, name, 128 * 1024, KMC_KMEM);
if (rc)
return rc;
return splat_kmem_cache_size_test(file, arg, name, 128 * 1028, KMC_VMEM);
}
static void
@@ -533,11 +555,12 @@ splat_kmem_test8_thread(void *arg)
vmem_free(objs, count * sizeof(void *));
out:
spin_lock(&kcp->kcp_lock);
kcp->kcp_threads--;
if (!kcp->kcp_rc)
kcp->kcp_rc = rc;
wake_up(&kcp->kcp_waitq);
if (--kcp->kcp_threads == 0)
wake_up(&kcp->kcp_waitq);
spin_unlock(&kcp->kcp_lock);
thread_exit();
@@ -573,7 +596,7 @@ splat_kmem_test8_sc(struct file *file, void *arg, int size, int count)
splat_vprint(file, SPLAT_KMEM_TEST8_NAME, "%-22s %s", "name",
"time (sec)\tslabs \tobjs \thash\n");
splat_vprint(file, SPLAT_KMEM_TEST8_NAME, "%-22s %s", "",
" \ttot/max/calc\ttot/max/calc\tsize/depth\n");
" \ttot/max/calc\ttot/max/calc\n");
for (i = 1; i <= count; i *= 2) {
kcp.kcp_size = size;
@@ -611,7 +634,7 @@ splat_kmem_test8_sc(struct file *file, void *arg, int size, int count)
delta = timespec_sub(stop, start);
splat_vprint(file, SPLAT_KMEM_TEST8_NAME, "%-22s %2ld.%09ld\t"
"%lu/%lu/%lu\t%lu/%lu/%lu\t%lu/%lu\n",
"%lu/%lu/%lu\t%lu/%lu/%lu\n",
kcp.kcp_cache->skc_name,
delta.tv_sec, delta.tv_nsec,
(unsigned long)kcp.kcp_cache->skc_slab_total,
@@ -620,9 +643,7 @@ splat_kmem_test8_sc(struct file *file, void *arg, int size, int count)
SPL_KMEM_CACHE_OBJ_PER_SLAB),
(unsigned long)kcp.kcp_cache->skc_obj_total,
(unsigned long)kcp.kcp_cache->skc_obj_max,
(unsigned long)(kcp.kcp_alloc * threads),
(unsigned long)kcp.kcp_cache->skc_hash_size,
(unsigned long)kcp.kcp_cache->skc_hash_depth);
(unsigned long)(kcp.kcp_alloc * threads));
kmem_cache_destroy(kcp.kcp_cache);