cleanup
This commit is contained in:
parent
b0cde80b54
commit
41586f9ad0
65
alloc.c
65
alloc.c
@ -8,27 +8,17 @@
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#include <errno.h>
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#include "topo.h"
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static pthread_mutex_t alloc_lock;
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#define NM_MAX_OBJS_PER_LVL (256)
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#define MEM_OBJ_SIZE (4096) // 4k
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#define MEM_OBJ_NUM (1024 * 256) // 4k * 1024 * 256 = 1GB per region
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#define MEM_REGION_NUM (4) // 4 x 1GB = 4GB total
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static int nm_mem_idx[NM_MAX_OBJS_PER_LVL];
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static int nm_mem_region_idx[NM_MAX_OBJS_PER_LVL];
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static void* nm_mem_regions[NM_MAX_OBJS_PER_LVL][MEM_REGION_NUM];
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struct topo_obj;
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#include "topop.h"
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int
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topo_alloc_init(int verbose, struct topo_obj * tobj)
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topo_alloc_init(struct topo_desc * desc, int verbose)
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{
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long tid;
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thr_self(&tid);
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domainset_t orig_dom;
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int orig_policy;
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pthread_mutex_init(&alloc_lock, NULL);
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pthread_mutex_init(&desc->alloc_lock, NULL);
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DOMAINSET_ZERO(&orig_dom);
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@ -39,40 +29,37 @@ topo_alloc_init(int verbose, struct topo_obj * tobj)
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}
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domainset_t tmp_domain;
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for (int i = 0; i < topo_num_numa(tobj); i++) {
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for (int i = 0; i < desc->num_numa; i++) {
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DOMAINSET_ZERO(&tmp_domain);
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DOMAINSET_SET(i, &tmp_domain);
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ret = cpuset_setdomain(CPU_LEVEL_WHICH, CPU_WHICH_TID, tid, sizeof(tmp_domain), &tmp_domain, DOMAINSET_POLICY_PREFER);
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if (ret != 0) {
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if (verbose) {
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fprintf(stderr, "libnm: cpuset_setdomain failed with %d\n", errno);
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}
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return ret;
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}
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for (unsigned int j = 0; j < MEM_REGION_NUM; j++) {
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if ((nm_mem_regions[i][j] = mmap(NULL, MEM_OBJ_NUM * MEM_OBJ_SIZE, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_ALIGNED_SUPER | MAP_NOCORE | MAP_PRIVATE | MAP_NOSYNC,
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-1, 0)) == MAP_FAILED) {
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if (verbose) {
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for (unsigned int j = 0; j < ALLOC_MEM_REGION_NUM; j++) {
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if ((desc->mem_regions[i][j] = mmap(NULL, ALLOC_MEM_OBJ_NUM * ALLOC_MEM_OBJ_SIZE, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_ALIGNED_SUPER | MAP_NOCORE | MAP_PRIVATE | MAP_NOSYNC, -1, 0)) == MAP_FAILED) {
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fprintf(stderr, "libnm: mmap failed with %d\n", errno);
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}
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return -1;
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}
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// touch the pages to prefault the pages
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for (unsigned int k = 0; k < MEM_OBJ_NUM; k++) {
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*(uint32_t*)((char*)nm_mem_regions[i][j] + k * MEM_OBJ_SIZE) = 0;
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for (unsigned int k = 0; k < ALLOC_MEM_OBJ_NUM; k++) {
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*(uint32_t*)((char*)desc->mem_regions[i][j] + k * ALLOC_MEM_OBJ_SIZE) = 0;
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}
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if (verbose) {
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fprintf(stdout, "libnm: reserved %u bytes (%u MB) on node %d. vaddr: 0x%p\n", MEM_OBJ_NUM * MEM_OBJ_SIZE, MEM_OBJ_SIZE * MEM_OBJ_NUM / 1024 / 1024, i, nm_mem_regions[i][j]);
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fprintf(stdout, "libnm: reserved %u bytes (%u MB) on node %d. vaddr: 0x%p\n", ALLOC_MEM_OBJ_NUM * ALLOC_MEM_OBJ_SIZE,
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ALLOC_MEM_OBJ_SIZE * ALLOC_MEM_OBJ_NUM / 1024 / 1024,
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i, desc->mem_regions[i][j]);
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}
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}
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nm_mem_idx[i] = 0;
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nm_mem_region_idx[i] = 0;
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desc->mem_idx[i] = 0;
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desc->mem_region_idx[i] = 0;
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}
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// restore existing thread's allocation strategy
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@ -82,35 +69,35 @@ topo_alloc_init(int verbose, struct topo_obj * tobj)
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}
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void *
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topo_malloc(unsigned int node, size_t size)
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topo_desc_malloc(struct topo_desc * desc, unsigned int node, size_t size)
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{
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void * ret = NULL;
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int num_objs = (size + MEM_OBJ_SIZE - 1) / MEM_OBJ_SIZE;
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int num_objs = (size + ALLOC_MEM_OBJ_SIZE - 1) / ALLOC_MEM_OBJ_SIZE;
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int retry = 0;
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pthread_mutex_lock(&alloc_lock);
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int cur_region = nm_mem_region_idx[node];
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int cur_idx = nm_mem_idx[node];
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pthread_mutex_lock(&desc->alloc_lock);
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int cur_region = desc->mem_region_idx[node];
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int cur_idx = desc->mem_idx[node];
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retry:
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if ((int)MEM_OBJ_NUM - cur_idx >= num_objs) {
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ret = (char*)nm_mem_regions[node][cur_region] + MEM_OBJ_SIZE * cur_idx;
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nm_mem_region_idx[node] = cur_region;
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nm_mem_idx[node] = cur_idx + num_objs;
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} else if (!retry && (cur_region < (int)MEM_REGION_NUM)) {
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if ((int)ALLOC_MEM_OBJ_NUM - cur_idx >= num_objs) {
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ret = (char*)desc->mem_regions[node][cur_region] + ALLOC_MEM_OBJ_SIZE * cur_idx;
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desc->mem_region_idx[node] = cur_region;
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desc->mem_idx[node] = cur_idx + num_objs;
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} else if (!retry && (cur_region < (int)ALLOC_MEM_REGION_NUM)) {
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// check next region
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cur_region++;
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cur_idx = 0;
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retry = 1;
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goto retry;
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}
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pthread_mutex_unlock(&alloc_lock);
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pthread_mutex_unlock(&desc->alloc_lock);
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return ret;
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}
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void
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topo_free(unsigned int node __attribute__((unused)), void * addr __attribute__((unused)))
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topo_desc_free(struct topo_desc * desc __attribute__((unused)), unsigned int node __attribute__((unused)), void * addr __attribute__((unused)))
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{
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// dummy function
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}
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@ -7,6 +7,8 @@
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extern "C" {
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#endif
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struct topo_desc;
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int
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topo_num_core();
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@ -20,7 +22,7 @@ void
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topo_destroy();
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int
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topo_init(int verbose, int alloc_init);
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topo_init(int enable_alloc, int verbose);
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void *
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topo_malloc(unsigned int node, size_t size);
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@ -96,7 +96,7 @@ int ts_test()
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int main()
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{
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topo_init(1, 1);
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topo_init(1, 0);
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topo_init(0, 1);
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ts_test();
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return 0;
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}
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24
timestamp.c
24
timestamp.c
@ -5,30 +5,30 @@
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#include <sys/sysctl.h>
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#include "topo.h"
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static uint64_t sysctl_tsc_freq = 0;
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#include "topop.h"
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#define S2NS (1000000000UL)
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static uint64_t
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tsc2ns(uint64_t tsc)
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tsc2ns(uint64_t tsc, uint64_t tsc_freq)
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{
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return (uint64_t)(
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(double)tsc / (double)sysctl_tsc_freq * S2NS);
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(double)tsc / (double)tsc_freq * S2NS);
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}
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int
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topo_ts_init(int verbose)
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topo_ts_init(struct topo_desc * desc, int verbose)
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{
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int rc;
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size_t sz = sizeof(sysctl_tsc_freq);
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size_t sz = sizeof(desc->tsc_freq);
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// init nm_tsc2ns
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if ((rc = sysctlbyname(
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"machdep.tsc_freq", &sysctl_tsc_freq, &sz, NULL, 0)) < 0) {
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if ((rc = sysctlbyname("machdep.tsc_freq", &desc->tsc_freq, &sz, NULL, 0)) < 0) {
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fprintf(stderr,"libtopo: failed to query tsc frequency via sysctl (%d)\n", errno);
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} else {
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if (verbose) {
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fprintf(stderr,
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"libnm: failed to query tsc frequency via sysctl (%d)\n", errno);
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fprintf(stdout,"libtopo: tsc frequency = %lu\n", desc->tsc_freq);
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}
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}
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@ -36,11 +36,11 @@ topo_ts_init(int verbose)
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}
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uint64_t
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topo_uptime_ns()
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topo_desc_uptime_ns(struct topo_desc * desc)
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{
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unsigned int dummy;
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_mm_lfence();
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uint64_t tsc = __rdtscp(&dummy);
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_mm_lfence();
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return tsc2ns(tsc);
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return tsc2ns(tsc, desc->tsc_freq);
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}
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135
topo.c
135
topo.c
@ -17,9 +17,8 @@
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#include "libxml/xmlversion.h"
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#include "topo.h"
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#include "topop.h"
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#define TOPO_MAX_CHILDREN (256)
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#define TOPO_INVALID (-1)
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#define TOPO_CACHE_L2 (2)
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@ -41,9 +40,9 @@ struct topo_obj {
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struct topo_obj * children[TOPO_MAX_CHILDREN];
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};
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extern int topo_alloc_init(int verbose, struct topo_obj * tobj);
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extern int topo_ts_init(int verbose);
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static struct topo_obj * g_tobj = NULL;
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static struct topo_desc g_default_desc = {0};
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static _Atomic(int) initialized = 0;
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static volatile int init_rc = 0;
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static void
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mask_to_cpuset(const char * mask, cpuset_t * cset)
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@ -80,7 +79,7 @@ mask_to_cpuset(const char * mask, cpuset_t * cset)
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}
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static void
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preorder_dump(struct topo_obj * root, int indent) {
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tobj_preorder_dump(struct topo_obj * root, int indent) {
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cpuset_t tmpset;
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CPU_COPY(&root->mask, &tmpset);
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const char * flag_str;
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@ -110,12 +109,12 @@ preorder_dump(struct topo_obj * root, int indent) {
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}
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printf("\n");
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for (int i = 0; i < root->num_children; i++) {
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preorder_dump(root->children[i], indent + 1);
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tobj_preorder_dump(root->children[i], indent + 1);
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}
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}
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static xmlAttr *
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find_attr(xmlNode * root, const char * attr_name)
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xml_find_attr(xmlNode * root, const char * attr_name)
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{
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xmlAttr * attr = root->properties;
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while (attr != NULL) {
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@ -129,7 +128,7 @@ find_attr(xmlNode * root, const char * attr_name)
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}
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static void
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free_root(struct topo_obj * root)
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tobj_free_root(struct topo_obj * root)
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{
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if (root == NULL) {
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return;
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@ -137,7 +136,7 @@ free_root(struct topo_obj * root)
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if (root->num_children > 0) {
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for (int i = 0; i < root->num_children; i++) {
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free_root(root->children[i]);
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tobj_free_root(root->children[i]);
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}
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}
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@ -145,21 +144,21 @@ free_root(struct topo_obj * root)
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}
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static int
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populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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tobj_populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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{
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int rc = 0;
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if (root->type == XML_ELEMENT_NODE) {
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if (strcmp((const char*)root->name, "group") == 0) {
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// this is a group, then check cache-level
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xmlAttr * attr = find_attr(root, "cache-level");
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xmlAttr * attr = xml_find_attr(root, "cache-level");
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if (attr == NULL) {
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fprintf(stderr, "libtopo: could not find attr cache-level in group.\n");
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return -1;
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}
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xmlAttr * lvl_attr = find_attr(root, "level");
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xmlAttr * lvl_attr = xml_find_attr(root, "level");
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if (lvl_attr == NULL) {
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fprintf(stderr, "libtopo: could not find attr level in group.\n");
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return -1;
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@ -193,7 +192,7 @@ populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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parent = tobj;
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} else if (strcmp((const char*)root->name, "cpu") == 0) {
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xmlAttr * attr = find_attr(root, "mask");
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xmlAttr * attr = xml_find_attr(root, "mask");
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if (attr == NULL) {
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fprintf(stderr, "libtopo: could not find attr mask in cpu.\n");
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@ -202,7 +201,7 @@ populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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mask_to_cpuset((const char *)attr->children->content, &parent->mask);
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} else if (strcmp((const char *)root->name, "flag") == 0) {
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xmlAttr * attr = find_attr(root, "name");
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xmlAttr * attr = xml_find_attr(root, "name");
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if (attr == NULL) {
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fprintf(stderr, "libtopo: could not find attr name in flag.\n");
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@ -222,7 +221,7 @@ populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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xmlNode * child = root->children;
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while (child != NULL) {
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if ((rc = populate_root(child, parent, out)) != 0) {
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if ((rc = tobj_populate_root(child, parent, out)) != 0) {
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break;
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}
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child = child->next;
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@ -232,7 +231,7 @@ populate_root(xmlNode * root, struct topo_obj * parent, struct topo_obj ** out)
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}
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static int
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init(struct topo_obj **out)
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tobj_populate(struct topo_obj **out)
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{
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int rc;
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size_t sz;
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@ -262,12 +261,12 @@ init(struct topo_obj **out)
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errno = EINVAL;
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return -1;
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}
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rc = populate_root(xmlDocGetRootElement(doc), NULL, out) != 0;
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rc = tobj_populate_root(xmlDocGetRootElement(doc), NULL, out) != 0;
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free(buf);
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xmlFreeDoc(doc);
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if (rc != 0) {
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free_root(*out);
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tobj_free_root(*out);
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errno = EINVAL;
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return rc;
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}
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@ -276,7 +275,7 @@ init(struct topo_obj **out)
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}
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static struct topo_obj *
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find_node_by_mask(struct topo_obj * root, cpuset_t * set)
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tobj_find_node_by_mask(struct topo_obj * root, cpuset_t * set)
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{
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if (!CPU_SUBSET(&root->mask, set)) {
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return NULL;
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@ -284,7 +283,7 @@ find_node_by_mask(struct topo_obj * root, cpuset_t * set)
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struct topo_obj * best_fit;
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for (int i = 0; i < root->num_children; i++) {
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best_fit = find_node_by_mask(root->children[i], set);
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best_fit = tobj_find_node_by_mask(root->children[i], set);
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if (best_fit != NULL) {
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break;
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}
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@ -294,7 +293,7 @@ find_node_by_mask(struct topo_obj * root, cpuset_t * set)
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}
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static struct topo_obj *
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find_node_by_flag(struct topo_obj * root, int flag)
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tobj_find_node_by_flag(struct topo_obj * root, int flag)
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{
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if (root->flags & flag) {
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return root;
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@ -302,7 +301,7 @@ find_node_by_flag(struct topo_obj * root, int flag)
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struct topo_obj * result;
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for (int i = 0; i < root->num_children; i++) {
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result = find_node_by_flag(root->children[i], flag);
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result = tobj_find_node_by_flag(root->children[i], flag);
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if (result != NULL) {
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return result;
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}
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@ -312,13 +311,13 @@ find_node_by_flag(struct topo_obj * root, int flag)
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}
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static int
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_topo_core_to_numa(struct topo_obj * root, int coreid)
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tobj_core_to_numa(struct topo_obj * root, int coreid)
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{
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cpuset_t set;
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CPU_ZERO(&set);
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CPU_SET(coreid, &set);
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struct topo_obj * obj = find_node_by_mask(root, &set);
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struct topo_obj * obj = tobj_find_node_by_mask(root, &set);
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if (obj == NULL) {
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return TOPO_INVALID;
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}
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@ -341,9 +340,9 @@ _topo_core_to_numa(struct topo_obj * root, int coreid)
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}
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static int
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_topo_num_numa(struct topo_obj * root)
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tobj_get_num_numa(struct topo_obj * root)
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{
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struct topo_obj * result = find_node_by_flag(root, TOPO_FLAG_NUMA);
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struct topo_obj * result = tobj_find_node_by_flag(root, TOPO_FLAG_NUMA);
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if (result == NULL) {
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return 1;
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@ -357,78 +356,114 @@ _topo_num_numa(struct topo_obj * root)
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}
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static int
|
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_topo_num_core(struct topo_obj * root)
|
||||
tobj_get_num_core(struct topo_obj * root)
|
||||
{
|
||||
return CPU_COUNT(&root->mask);
|
||||
}
|
||||
|
||||
static void
|
||||
_topo_destroy(struct topo_obj * obj)
|
||||
desc_destroy(struct topo_desc * desc)
|
||||
{
|
||||
free_root(obj);
|
||||
tobj_free_root(desc->root);
|
||||
}
|
||||
|
||||
static int
|
||||
_topo_init(int verbose, int alloc_init, struct topo_obj ** obj)
|
||||
desc_init(struct topo_desc * desc, int enable_alloc, int verbose)
|
||||
{
|
||||
int rc = init(obj);
|
||||
desc->root = NULL;
|
||||
int rc = tobj_populate(&desc->root);
|
||||
|
||||
if (verbose) {
|
||||
if (rc == 0) {
|
||||
int num_cores = _topo_num_core(*obj);
|
||||
fprintf(stdout, "libtopo: %d cores, %d numa domains detected.\n", num_cores, _topo_num_numa(*obj));
|
||||
for (int i = 0; i < num_cores; i++) {
|
||||
fprintf(stdout, "libtopo: core #%d @ numa domain %d.\n", i, _topo_core_to_numa(*obj, i));
|
||||
desc->num_core = tobj_get_num_core(desc->root);
|
||||
desc->num_numa = tobj_get_num_numa(desc->root);
|
||||
if (desc->num_core > TOPO_MAX_CHILDREN) {
|
||||
fprintf(stderr, "libtopo: too many cores - %d\n", desc->num_core);
|
||||
rc = ENOMEM;
|
||||
} else {
|
||||
for (int i = 0; i < desc->num_core; i++) {
|
||||
desc->core_to_numa_lookup[i] = tobj_core_to_numa(desc->root, i);
|
||||
}
|
||||
if (verbose) {
|
||||
fprintf(stdout, "libtopo: %d cores, %d numa domains detected.\n", desc->num_core, desc->num_numa);
|
||||
for (int i = 0; i < desc->num_core; i++) {
|
||||
fprintf(stdout, "libtopo: core #%d @ numa domain %d.\n", i, desc->core_to_numa_lookup[i]);
|
||||
}
|
||||
fprintf(stdout, "libtopo: parsed tree:\n");
|
||||
preorder_dump(*obj, 1);
|
||||
tobj_preorder_dump(desc->root, 1);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
fprintf(stderr, "libtopo: failed to parse topo: %d\n", errno);
|
||||
}
|
||||
|
||||
if (rc == 0) {
|
||||
rc = topo_ts_init(desc, verbose);
|
||||
}
|
||||
|
||||
rc = topo_ts_init(verbose);
|
||||
if (enable_alloc && rc == 0) {
|
||||
rc = topo_alloc_init(desc, verbose);
|
||||
}
|
||||
|
||||
if (alloc_init && rc == 0) {
|
||||
rc = topo_alloc_init(verbose, *obj);
|
||||
if (rc != 0) {
|
||||
if (desc->root != NULL) {
|
||||
tobj_free_root(desc->root);
|
||||
}
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
//
|
||||
// public APIs
|
||||
//
|
||||
int
|
||||
topo_num_core()
|
||||
{
|
||||
return _topo_num_core(g_tobj);
|
||||
return g_default_desc.num_core;
|
||||
}
|
||||
|
||||
int
|
||||
topo_num_numa()
|
||||
{
|
||||
return _topo_num_numa(g_tobj);
|
||||
return g_default_desc.num_numa;
|
||||
}
|
||||
|
||||
int
|
||||
topo_core_to_numa(int coreid)
|
||||
{
|
||||
return _topo_core_to_numa(g_tobj, coreid);
|
||||
return g_default_desc.core_to_numa_lookup[coreid];
|
||||
}
|
||||
|
||||
static _Atomic(int) initialized = 0;
|
||||
static volatile int init_rc = 0;
|
||||
|
||||
void
|
||||
topo_destroy()
|
||||
{
|
||||
_topo_destroy(g_tobj);
|
||||
desc_destroy(&g_default_desc);
|
||||
}
|
||||
|
||||
void *
|
||||
topo_malloc(unsigned int node, size_t size)
|
||||
{
|
||||
return topo_desc_malloc(&g_default_desc, node, size);
|
||||
}
|
||||
|
||||
void
|
||||
topo_free(unsigned int node, void * addr)
|
||||
{
|
||||
return topo_desc_free(&g_default_desc, node, addr);
|
||||
}
|
||||
|
||||
uint64_t
|
||||
topo_uptime_ns()
|
||||
{
|
||||
return topo_desc_uptime_ns(&g_default_desc);
|
||||
}
|
||||
|
||||
int
|
||||
topo_init(int verbose, int alloc_init)
|
||||
topo_init(int enable_alloc, int verbose)
|
||||
{
|
||||
int expected = 0;
|
||||
if (atomic_compare_exchange_strong(&initialized, &expected, 2)) {
|
||||
init_rc = _topo_init(verbose, alloc_init, &g_tobj);
|
||||
init_rc = desc_init(&g_default_desc, enable_alloc, verbose);
|
||||
atomic_store(&initialized, 1);
|
||||
} else {
|
||||
while(atomic_load(&initialized) != 1) {} // wait for init
|
||||
|
||||
42
topop.h
Normal file
42
topop.h
Normal file
@ -0,0 +1,42 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdint.h>
|
||||
#include <pthread.h>
|
||||
|
||||
#define TOPO_MAX_CHILDREN (256)
|
||||
|
||||
#define ALLOC_MAX_OBJS_PER_LVL (256)
|
||||
#define ALLOC_MEM_OBJ_SIZE (4096) // 4k
|
||||
#define ALLOC_MEM_OBJ_NUM (1024 * 256) // 4k * 1024 * 256 = 1GB per region
|
||||
#define ALLOC_MEM_REGION_NUM (4) // 4 x 1GB = 4GB total
|
||||
|
||||
struct topo_desc {
|
||||
struct topo_obj * root;
|
||||
int core_to_numa_lookup[TOPO_MAX_CHILDREN];
|
||||
int num_core;
|
||||
int num_numa;
|
||||
|
||||
// ts
|
||||
uint64_t tsc_freq;
|
||||
|
||||
// alloc
|
||||
pthread_mutex_t alloc_lock;
|
||||
int mem_idx[ALLOC_MAX_OBJS_PER_LVL];
|
||||
int mem_region_idx[ALLOC_MAX_OBJS_PER_LVL];
|
||||
void* mem_regions[ALLOC_MAX_OBJS_PER_LVL][ALLOC_MEM_REGION_NUM];
|
||||
};
|
||||
|
||||
int
|
||||
topo_alloc_init(struct topo_desc * desc, int verbose);
|
||||
|
||||
int
|
||||
topo_ts_init(struct topo_desc *desc, int verbose);
|
||||
|
||||
uint64_t
|
||||
topo_desc_uptime_ns(struct topo_desc * desc);
|
||||
|
||||
void *
|
||||
topo_desc_malloc(struct topo_desc * desc, unsigned int node, size_t size);
|
||||
|
||||
void
|
||||
topo_desc_free(struct topo_desc * desc __attribute__((unused)), unsigned int node __attribute__((unused)), void * addr __attribute__((unused)));
|
||||
Loading…
Reference in New Issue
Block a user