From 8674b203f1270034e7d23d58b0c40ebdf996625e Mon Sep 17 00:00:00 2001 From: David Marchand Date: Mon, 2 Dec 2019 16:42:20 +0100 Subject: [PATCH] eal: remove limitation on cpuset with --lcores Contrary to the -c/-l options, where a logical core runs on the same physical core in a 1:1 fashion (example: lcore 0 runs on core 0, lcore 16 runs on core 16), the --lcores option makes it possible to select the physical cores on which runs a logical core. However the current parsing code still limits the cpuset to the [0, RTE_MAX_LCORE] range. Example, before the patch, on a 24 cores system with RTE_MAX_LCORE == 16: $ ./master/app/testpmd --no-huge --no-pci -m 512 --log-level *:debug \ --lcores 0@16,1@17 -- -i --total-num-mbufs 2048 EAL: Detected lcore 0 as core 0 on socket 0 EAL: Detected lcore 1 as core 1 on socket 0 EAL: Detected lcore 2 as core 2 on socket 0 EAL: Detected lcore 3 as core 3 on socket 0 EAL: Detected lcore 4 as core 4 on socket 0 EAL: Detected lcore 5 as core 5 on socket 0 EAL: Detected lcore 6 as core 6 on socket 0 EAL: Detected lcore 7 as core 8 on socket 0 EAL: Detected lcore 8 as core 9 on socket 0 EAL: Detected lcore 9 as core 10 on socket 0 EAL: Detected lcore 10 as core 11 on socket 0 EAL: Detected lcore 11 as core 12 on socket 0 EAL: Detected lcore 12 as core 13 on socket 0 EAL: Detected lcore 13 as core 14 on socket 0 EAL: Detected lcore 14 as core 0 on socket 0 EAL: Detected lcore 15 as core 1 on socket 0 EAL: Skipped lcore 16 as core 2 on socket 0 EAL: Skipped lcore 17 as core 3 on socket 0 EAL: Skipped lcore 18 as core 4 on socket 0 EAL: Skipped lcore 19 as core 5 on socket 0 EAL: Skipped lcore 20 as core 6 on socket 0 EAL: Skipped lcore 21 as core 8 on socket 0 EAL: Skipped lcore 22 as core 9 on socket 0 EAL: Skipped lcore 23 as core 10 on socket 0 EAL: Skipped lcore 24 as core 11 on socket 0 EAL: Skipped lcore 25 as core 12 on socket 0 EAL: Skipped lcore 26 as core 13 on socket 0 EAL: Skipped lcore 27 as core 14 on socket 0 EAL: Support maximum 16 logical core(s) by configuration. EAL: Detected 16 lcore(s) EAL: Detected 1 NUMA nodes EAL: invalid parameter for --lcores We can remove this limitation by using a cpuset_t (which is a more natural type since this is what gets passed to pthread_setaffinity* in the end). After the patch: $ ./master/app/testpmd --no-huge --no-pci -m 512 --log-level *:debug \ --lcores 0@16,1@17 -- -i --total-num-mbufs 2048 [...] EAL: Master lcore 0 is ready (tid=7f94217bbc00;cpuset=[16]) EAL: lcore 1 is ready (tid=7f941f491700;cpuset=[17]) Signed-off-by: David Marchand --- drivers/bus/fslmc/portal/dpaa2_hw_dpio.c | 31 ++++++----- lib/librte_eal/common/eal_common_options.c | 63 +++++++++++----------- lib/librte_eal/common/eal_common_thread.c | 4 +- 3 files changed, 50 insertions(+), 48 deletions(-) diff --git a/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c b/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c index 3ca3ae4f51..739ce434ba 100644 --- a/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c +++ b/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c @@ -365,20 +365,25 @@ dpaa2_check_lcore_cpuset(void) dpaa2_cpu[lcore_id] = 0xffffffff; for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) { - for (i = 0; i < RTE_MAX_LCORE; i++) { - rte_cpuset_t cpuset = rte_lcore_cpuset(lcore_id); - - if (CPU_ISSET(i, &cpuset)) { - RTE_LOG(DEBUG, EAL, "lcore id = %u cpu=%u\n", - lcore_id, i); - if (dpaa2_cpu[lcore_id] != 0xffffffff) { - DPAA2_BUS_ERR( - "ERR:lcore map to multi-cpu not supported"); - ret = -1; - } else { - dpaa2_cpu[lcore_id] = i; - } + rte_cpuset_t cpuset = rte_lcore_cpuset(lcore_id); + + for (i = 0; i < CPU_SETSIZE; i++) { + if (!CPU_ISSET(i, &cpuset)) + continue; + if (i >= RTE_MAX_LCORE) { + DPAA2_BUS_ERR("ERR:lcore map to core %u (>= %u) not supported", + i, RTE_MAX_LCORE); + ret = -1; + continue; } + RTE_LOG(DEBUG, EAL, "lcore id = %u cpu=%u\n", + lcore_id, i); + if (dpaa2_cpu[lcore_id] != 0xffffffff) { + DPAA2_BUS_ERR("ERR:lcore map to multi-cpu not supported"); + ret = -1; + continue; + } + dpaa2_cpu[lcore_id] = i; } } return ret; diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c index 68f7d1cd73..5920233bcd 100644 --- a/lib/librte_eal/common/eal_common_options.c +++ b/lib/librte_eal/common/eal_common_options.c @@ -658,14 +658,14 @@ eal_parse_master_lcore(const char *arg) * ',' used for a single number. */ static int -eal_parse_set(const char *input, uint16_t set[], unsigned num) +eal_parse_set(const char *input, rte_cpuset_t *set) { unsigned idx; const char *str = input; char *end = NULL; unsigned min, max; - memset(set, 0, num * sizeof(uint16_t)); + CPU_ZERO(set); while (isblank(*str)) str++; @@ -678,7 +678,7 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) if (*str != '(') { errno = 0; idx = strtoul(str, &end, 10); - if (errno || end == NULL || idx >= num) + if (errno || end == NULL || idx >= CPU_SETSIZE) return -1; else { while (isblank(*end)) @@ -696,7 +696,7 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) errno = 0; idx = strtoul(end, &end, 10); - if (errno || end == NULL || idx >= num) + if (errno || end == NULL || idx >= CPU_SETSIZE) return -1; max = idx; while (isblank(*end)) @@ -711,7 +711,7 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) for (idx = RTE_MIN(min, max); idx <= RTE_MAX(min, max); idx++) - set[idx] = 1; + CPU_SET(idx, set); return end - input; } @@ -736,7 +736,7 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) /* get the digit value */ errno = 0; idx = strtoul(str, &end, 10); - if (errno || end == NULL || idx >= num) + if (errno || end == NULL || idx >= CPU_SETSIZE) return -1; /* go ahead to separator '-',',' and ')' */ @@ -753,7 +753,7 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) min = idx; for (idx = RTE_MIN(min, max); idx <= RTE_MAX(min, max); idx++) - set[idx] = 1; + CPU_SET(idx, set); min = RTE_MAX_LCORE; } else @@ -772,17 +772,13 @@ eal_parse_set(const char *input, uint16_t set[], unsigned num) return str - input; } -/* convert from set array to cpuset bitmap */ static int -convert_to_cpuset(rte_cpuset_t *cpusetp, - uint16_t *set, unsigned num) +check_cpuset(rte_cpuset_t *set) { - unsigned idx; - - CPU_ZERO(cpusetp); + unsigned int idx; - for (idx = 0; idx < num; idx++) { - if (!set[idx]) + for (idx = 0; idx < CPU_SETSIZE; idx++) { + if (!CPU_ISSET(idx, set)) continue; if (eal_cpu_detected(idx) == 0) { @@ -790,10 +786,7 @@ convert_to_cpuset(rte_cpuset_t *cpusetp, "unavailable\n", idx); return -1; } - - CPU_SET(idx, cpusetp); } - return 0; } @@ -815,7 +808,8 @@ static int eal_parse_lcores(const char *lcores) { struct rte_config *cfg = rte_eal_get_configuration(); - static uint16_t set[RTE_MAX_LCORE]; + rte_cpuset_t lcore_set; + unsigned int set_count; unsigned idx = 0; unsigned count = 0; const char *lcore_start = NULL; @@ -864,18 +858,13 @@ eal_parse_lcores(const char *lcores) lcores += strcspn(lcores, "@,"); if (*lcores == '@') { - /* explicit assign cpu_set */ - offset = eal_parse_set(lcores + 1, set, RTE_DIM(set)); + /* explicit assign cpuset and update the end cursor */ + offset = eal_parse_set(lcores + 1, &cpuset); if (offset < 0) goto err; - - /* prepare cpu_set and update the end cursor */ - if (0 > convert_to_cpuset(&cpuset, - set, RTE_DIM(set))) - goto err; end = lcores + 1 + offset; } else { /* ',' or '\0' */ - /* haven't given cpu_set, current loop done */ + /* haven't given cpuset, current loop done */ end = lcores; /* go back to check - */ @@ -889,18 +878,19 @@ eal_parse_lcores(const char *lcores) goto err; /* parse lcore_set from start point */ - if (0 > eal_parse_set(lcore_start, set, RTE_DIM(set))) + if (eal_parse_set(lcore_start, &lcore_set) < 0) goto err; - /* without '@', by default using lcore_set as cpu_set */ - if (*lcores != '@' && - 0 > convert_to_cpuset(&cpuset, set, RTE_DIM(set))) - goto err; + /* without '@', by default using lcore_set as cpuset */ + if (*lcores != '@') + rte_memcpy(&cpuset, &lcore_set, sizeof(cpuset)); + set_count = CPU_COUNT(&lcore_set); /* start to update lcore_set */ for (idx = 0; idx < RTE_MAX_LCORE; idx++) { - if (!set[idx]) + if (!CPU_ISSET(idx, &lcore_set)) continue; + set_count--; if (cfg->lcore_role[idx] != ROLE_RTE) { lcore_config[idx].core_index = count; @@ -912,10 +902,17 @@ eal_parse_lcores(const char *lcores) CPU_ZERO(&cpuset); CPU_SET(idx, &cpuset); } + + if (check_cpuset(&cpuset) < 0) + goto err; rte_memcpy(&lcore_config[idx].cpuset, &cpuset, sizeof(rte_cpuset_t)); } + /* some cores from the lcore_set can't be handled by EAL */ + if (set_count != 0) + goto err; + lcores = end + 1; } while (*end != '\0'); diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c index f9a8cf14d2..78581753c0 100644 --- a/lib/librte_eal/common/eal_common_thread.c +++ b/lib/librte_eal/common/eal_common_thread.c @@ -61,7 +61,7 @@ eal_cpuset_socket_id(rte_cpuset_t *cpusetp) break; } - } while (++cpu < RTE_MAX_LCORE); + } while (++cpu < CPU_SETSIZE); return socket_id; } @@ -118,7 +118,7 @@ eal_thread_dump_affinity(char *str, unsigned size) rte_thread_get_affinity(&cpuset); - for (cpu = 0; cpu < RTE_MAX_LCORE; cpu++) { + for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { if (!CPU_ISSET(cpu, &cpuset)) continue; -- 2.20.1