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Wed, 10 Jul 2024 19:52:42 -0700 (PDT) Received: from DY4X0N7X05.bytedance.net ([208.184.112.130]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3daa12f4f7csm117827b6e.41.2024.07.10.19.52.41 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 10 Jul 2024 19:52:42 -0700 (PDT) From: Yichen Wang To: Peter Xu , Fabiano Rosas , Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Thomas Huth , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Eric Blake , Markus Armbruster , Laurent Vivier , qemu-devel@nongnu.org Cc: "Hao Xiang" , "Liu, Yuan1" , "Zou, Nanhai" , "Ho-Ren (Jack) Chuang" , "Yichen Wang" , Bryan Zhang Subject: [PATCH v5 4/5] migration: Introduce 'qatzip' compression method Date: Wed, 10 Jul 2024 19:52:28 -0700 Message-Id: <20240711025229.66260-5-yichen.wang@bytedance.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20240711025229.66260-1-yichen.wang@bytedance.com> References: <20240711025229.66260-1-yichen.wang@bytedance.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::22f; envelope-from=yichen.wang@bytedance.com; helo=mail-oi1-x22f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Bryan Zhang Adds support for 'qatzip' as an option for the multifd compression method parameter, and implements using QAT for 'qatzip' compression and decompression. Signed-off-by: Bryan Zhang Signed-off-by: Hao Xiang Signed-off-by: Yichen Wang --- hw/core/qdev-properties-system.c | 6 +- migration/meson.build | 1 + migration/multifd-qatzip.c | 403 +++++++++++++++++++++++++++++++ migration/multifd.h | 5 +- qapi/migration.json | 3 + tests/qtest/meson.build | 4 + 6 files changed, 419 insertions(+), 3 deletions(-) create mode 100644 migration/multifd-qatzip.c diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c index f13350b4fb..eb50d6ec5b 100644 --- a/hw/core/qdev-properties-system.c +++ b/hw/core/qdev-properties-system.c @@ -659,7 +659,11 @@ const PropertyInfo qdev_prop_fdc_drive_type = { const PropertyInfo qdev_prop_multifd_compression = { .name = "MultiFDCompression", .description = "multifd_compression values, " - "none/zlib/zstd/qpl/uadk", + "none/zlib/zstd/qpl/uadk" +#ifdef CONFIG_QATZIP + "/qatzip" +#endif + , .enum_table = &MultiFDCompression_lookup, .get = qdev_propinfo_get_enum, .set = qdev_propinfo_set_enum, diff --git a/migration/meson.build b/migration/meson.build index 5ce2acb41e..c9454c26ae 100644 --- a/migration/meson.build +++ b/migration/meson.build @@ -41,6 +41,7 @@ system_ss.add(when: rdma, if_true: files('rdma.c')) system_ss.add(when: zstd, if_true: files('multifd-zstd.c')) system_ss.add(when: qpl, if_true: files('multifd-qpl.c')) system_ss.add(when: uadk, if_true: files('multifd-uadk.c')) +system_ss.add(when: qatzip, if_true: files('multifd-qatzip.c')) specific_ss.add(when: 'CONFIG_SYSTEM_ONLY', if_true: files('ram.c', diff --git a/migration/multifd-qatzip.c b/migration/multifd-qatzip.c new file mode 100644 index 0000000000..d01d51de8f --- /dev/null +++ b/migration/multifd-qatzip.c @@ -0,0 +1,403 @@ +/* + * Multifd QATzip compression implementation + * + * Copyright (c) Bytedance + * + * Authors: + * Bryan Zhang + * Hao Xiang + * Yichen Wang + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "exec/ramblock.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qapi/qapi-types-migration.h" +#include "options.h" +#include "multifd.h" +#include + +typedef struct { + /* + * Unique session for use with QATzip API + */ + QzSession_T sess; + + /* + * For compression: Buffer for pages to compress + * For decompression: Buffer for data to decompress + */ + uint8_t *in_buf; + uint32_t in_len; + + /* + * For compression: Output buffer of compressed data + * For decompression: Output buffer of decompressed data + */ + uint8_t *out_buf; + uint32_t out_len; +} QatzipData; + +/** + * qatzip_send_setup: Set up QATzip session and private buffers. + * + * @param p Multifd channel params + * @param errp Pointer to error, which will be set in case of error + * @return 0 on success, -1 on error (and *errp will be set) + */ +static int qatzip_send_setup(MultiFDSendParams *p, Error **errp) +{ + QatzipData *q; + QzSessionParamsDeflate_T params; + const char *err_msg; + int ret; + + q = g_new0(QatzipData, 1); + p->compress_data = q; + /* We need one extra place for the packet header */ + p->iov = g_new0(struct iovec, 2); + + /* Prefer without sw_fallback because of bad performance with sw_fallback. + * Warn if sw_fallback needs to be used. */ + ret = qzInit(&q->sess, false); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + /* Warn, and try with sw_fallback. */ + warn_report("Initilizing QAT with sw_fallback..."); + ret = qzInit(&q->sess, true); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + /* Warn, and try with sw_fallback. */ + err_msg = "qzInit failed"; + goto err_free_q; + } + } + + ret = qzGetDefaultsDeflate(¶ms); + if (ret != QZ_OK) { + err_msg = "qzGetDefaultsDeflate failed"; + goto err_close; + } + + /* Make sure to use configured QATzip compression level. */ + params.common_params.comp_lvl = migrate_multifd_qatzip_level(); + + ret = qzSetupSessionDeflate(&q->sess, ¶ms); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + err_msg = "qzSetupSessionDeflate failed"; + goto err_close; + } + + if (MULTIFD_PACKET_SIZE > UINT32_MAX) { + err_msg = "packet size too large for QAT"; + goto err_close; + } + + q->in_len = MULTIFD_PACKET_SIZE; + q->in_buf = qzMalloc(q->in_len, 0, PINNED_MEM); + if (!q->in_buf) { + err_msg = "qzMalloc failed"; + goto err_close; + } + + q->out_len = qzMaxCompressedLength(MULTIFD_PACKET_SIZE, &q->sess); + q->out_buf = qzMalloc(q->out_len, 0, PINNED_MEM); + if (!q->out_buf) { + err_msg = "qzMalloc failed"; + goto err_free_inbuf; + } + + return 0; + +err_free_inbuf: + qzFree(q->in_buf); +err_close: + qzClose(&q->sess); +err_free_q: + g_free(q); + g_free(p->iov); + p->iov = NULL; + p->compress_data = NULL; + error_setg(errp, "multifd %u: %s", p->id, err_msg); + return -1; +} + +/** + * qatzip_send_cleanup: Tear down QATzip session and release private buffers. + * + * @param p Multifd channel params + * @param errp Pointer to error, which will be set in case of error + * @return None + */ +static void qatzip_send_cleanup(MultiFDSendParams *p, Error **errp) +{ + QatzipData *q = p->compress_data; + const char *err_msg; + int ret; + + ret = qzTeardownSession(&q->sess); + if (ret != QZ_OK) { + err_msg = "qzTeardownSession failed"; + goto err; + } + + ret = qzClose(&q->sess); + if (ret != QZ_OK) { + err_msg = "qzClose failed"; + goto err; + } + + qzFree(q->in_buf); + q->in_buf = NULL; + qzFree(q->out_buf); + q->out_buf = NULL; + g_free(p->iov); + p->iov = NULL; + g_free(p->compress_data); + p->compress_data = NULL; + return; + +err: + error_setg(errp, "multifd %u: %s", p->id, err_msg); +} + +/** + * qatzip_send_prepare: Compress pages and update IO channel info. + * + * @param p Multifd channel params + * @param errp Pointer to error, which will be set in case of error + * @return 0 on success, -1 on error (and *errp will be set) + */ +static int qatzip_send_prepare(MultiFDSendParams *p, Error **errp) +{ + MultiFDPages_t *pages = p->pages; + QatzipData *q = p->compress_data; + int ret; + unsigned int in_len, out_len; + + if (!multifd_send_prepare_common(p)) { + goto out; + } + + /* Unlike other multifd compression implementations, we use a + * non-streaming API and place all the data into one buffer, rather than + * sending each page to the compression API at a time. */ + for (int i = 0; i < pages->normal_num; i++) { + memcpy(q->in_buf + (i * p->page_size), + p->pages->block->host + pages->offset[i], + p->page_size); + } + + in_len = pages->normal_num * p->page_size; + if (in_len > q->in_len) { + error_setg(errp, "multifd %u: unexpectedly large input", p->id); + return -1; + } + out_len = q->out_len; + + /* + * Unlike other multifd compression implementations, we use a non-streaming + * API and place all the data into one buffer, rather than sending each page + * to the compression API at a time. Based on initial benchmarks, the + * non-streaming API outperforms the streaming API. Plus, the logic in QEMU + * is friendly to using the non-streaming API anyway. If either of these + * statements becomes no longer true, we can revisit adding a streaming + * implementation. + */ + ret = qzCompress(&q->sess, q->in_buf, &in_len, q->out_buf, &out_len, 1); + if (ret != QZ_OK) { + error_setg(errp, "multifd %u: QATzip returned %d instead of QZ_OK", + p->id, ret); + return -1; + } + if (in_len != pages->normal_num * p->page_size) { + error_setg(errp, "multifd %u: QATzip failed to compress all input", + p->id); + return -1; + } + + p->iov[p->iovs_num].iov_base = q->out_buf; + p->iov[p->iovs_num].iov_len = out_len; + p->iovs_num++; + p->next_packet_size = out_len; + +out: + p->flags |= MULTIFD_FLAG_QATZIP; + multifd_send_fill_packet(p); + return 0; +} + +/** + * qatzip_recv_setup: Set up QATzip session and allocate private buffers. + * + * @param p Multifd channel params + * @param errp Pointer to error, which will be set in case of error + * @return 0 on success, -1 on error (and *errp will be set) + */ +static int qatzip_recv_setup(MultiFDRecvParams *p, Error **errp) +{ + QatzipData *q; + QzSessionParamsDeflate_T params; + const char *err_msg; + int ret; + + q = g_new0(QatzipData, 1); + p->compress_data = q; + + /* Prefer without sw_fallback because of bad performance with sw_fallback. + * Warn if sw_fallback needs to be used. */ + ret = qzInit(&q->sess, false); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + /* Warn, and try with sw_fallback. */ + warn_report("Initilizing QAT with sw_fallback..."); + ret = qzInit(&q->sess, true); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + /* Warn, and try with sw_fallback. */ + err_msg = "qzInit failed"; + goto err_free_q; + } + } + + ret = qzGetDefaultsDeflate(¶ms); + if (ret != QZ_OK) { + err_msg = "qzGetDefaultsDeflate failed"; + goto err_close; + } + + ret = qzSetupSessionDeflate(&q->sess, ¶ms); + if (ret != QZ_OK && ret != QZ_DUPLICATE) { + err_msg = "qzSetupSessionDeflate failed"; + goto err_close; + } + + /* + * Mimic multifd-zlib, which reserves extra space for the + * incoming packet. + */ + q->in_len = MULTIFD_PACKET_SIZE * 2; + /* PINNED_MEM is an enum from qatzip headers, which means to use + * kzalloc_node() to allocate memory for QAT DMA purposes. */ + q->in_buf = qzMalloc(q->in_len, 0, PINNED_MEM); + if (!q->in_buf) { + err_msg = "qzMalloc failed"; + goto err_close; + } + + q->out_len = MULTIFD_PACKET_SIZE; + q->out_buf = qzMalloc(q->out_len, 0, PINNED_MEM); + if (!q->out_buf) { + err_msg = "qzMalloc failed"; + goto err_free_inbuf; + } + + return 0; + +err_free_inbuf: + qzFree(q->in_buf); +err_close: + qzClose(&q->sess); +err_free_q: + g_free(q); + p->compress_data = NULL; + error_setg(errp, "multifd %u: %s", p->id, err_msg); + return -1; +} + +/** + * qatzip_recv_cleanup: Tear down QATzip session and release private buffers. + * + * @param p Multifd channel params + * @return None + */ +static void qatzip_recv_cleanup(MultiFDRecvParams *p) +{ + QatzipData *q = p->compress_data; + + /* Ignoring return values here due to function signature. */ + qzTeardownSession(&q->sess); + qzClose(&q->sess); + qzFree(q->in_buf); + qzFree(q->out_buf); + g_free(p->compress_data); +} + + +/** + * qatzip_recv: Decompress pages and copy them to the appropriate + * locations. + * + * @param p Multifd channel params + * @param errp Pointer to error, which will be set in case of error + * @return 0 on success, -1 on error (and *errp will be set) + */ +static int qatzip_recv(MultiFDRecvParams *p, Error **errp) +{ + QatzipData *q = p->compress_data; + int ret; + unsigned int in_len, out_len; + uint32_t in_size = p->next_packet_size; + uint32_t expected_size = p->normal_num * p->page_size; + uint32_t flags = p->flags & MULTIFD_FLAG_COMPRESSION_MASK; + + if (in_size > q->in_len) { + error_setg(errp, "multifd %u: received unexpectedly large packet", + p->id); + return -1; + } + + if (flags != MULTIFD_FLAG_QATZIP) { + error_setg(errp, "multifd %u: flags received %x flags expected %x", + p->id, flags, MULTIFD_FLAG_QATZIP); + return -1; + } + + multifd_recv_zero_page_process(p); + if (!p->normal_num) { + assert(in_size == 0); + return 0; + } + + ret = qio_channel_read_all(p->c, (void *)q->in_buf, in_size, errp); + if (ret != 0) { + return ret; + } + + in_len = in_size; + out_len = q->out_len; + ret = qzDecompress(&q->sess, q->in_buf, &in_len, q->out_buf, &out_len); + if (ret != QZ_OK) { + error_setg(errp, "multifd %u: qzDecompress failed", p->id); + return -1; + } + if (out_len != expected_size) { + error_setg(errp, "multifd %u: packet size received %u size expected %u", + p->id, out_len, expected_size); + return -1; + } + + /* Copy each page to its appropriate location. */ + for (int i = 0; i < p->normal_num; i++) { + memcpy(p->host + p->normal[i], + q->out_buf + p->page_size * i, + p->page_size); + } + return 0; +} + +static MultiFDMethods multifd_qatzip_ops = { + .send_setup = qatzip_send_setup, + .send_cleanup = qatzip_send_cleanup, + .send_prepare = qatzip_send_prepare, + .recv_setup = qatzip_recv_setup, + .recv_cleanup = qatzip_recv_cleanup, + .recv = qatzip_recv +}; + +static void multifd_qatzip_register(void) +{ + multifd_register_ops(MULTIFD_COMPRESSION_QATZIP, &multifd_qatzip_ops); +} + +migration_init(multifd_qatzip_register); diff --git a/migration/multifd.h b/migration/multifd.h index 0ecd6f47d7..adceb65050 100644 --- a/migration/multifd.h +++ b/migration/multifd.h @@ -34,14 +34,15 @@ MultiFDRecvData *multifd_get_recv_data(void); /* Multifd Compression flags */ #define MULTIFD_FLAG_SYNC (1 << 0) -/* We reserve 4 bits for compression methods */ -#define MULTIFD_FLAG_COMPRESSION_MASK (0xf << 1) +/* We reserve 5 bits for compression methods */ +#define MULTIFD_FLAG_COMPRESSION_MASK (0x1f << 1) /* we need to be compatible. Before compression value was 0 */ #define MULTIFD_FLAG_NOCOMP (0 << 1) #define MULTIFD_FLAG_ZLIB (1 << 1) #define MULTIFD_FLAG_ZSTD (2 << 1) #define MULTIFD_FLAG_QPL (4 << 1) #define MULTIFD_FLAG_UADK (8 << 1) +#define MULTIFD_FLAG_QATZIP (16 << 1) /* This value needs to be a multiple of qemu_target_page_size() */ #define MULTIFD_PACKET_SIZE (512 * 1024) diff --git a/qapi/migration.json b/qapi/migration.json index cd08f2f710..42b5363449 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -558,6 +558,8 @@ # # @zstd: use zstd compression method. # +# @qatzip: use qatzip compression method. (Since 9.1) +# # @qpl: use qpl compression method. Query Processing Library(qpl) is # based on the deflate compression algorithm and use the Intel # In-Memory Analytics Accelerator(IAA) accelerated compression @@ -570,6 +572,7 @@ { 'enum': 'MultiFDCompression', 'data': [ 'none', 'zlib', { 'name': 'zstd', 'if': 'CONFIG_ZSTD' }, + { 'name': 'qatzip', 'if': 'CONFIG_QATZIP'}, { 'name': 'qpl', 'if': 'CONFIG_QPL' }, { 'name': 'uadk', 'if': 'CONFIG_UADK' } ] } diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build index 6508bfb1a2..3068d73e08 100644 --- a/tests/qtest/meson.build +++ b/tests/qtest/meson.build @@ -327,6 +327,10 @@ if gnutls.found() endif endif +if qatzip.found() + migration_files += [qatzip] +endif + qtests = { 'bios-tables-test': [io, 'boot-sector.c', 'acpi-utils.c', 'tpm-emu.c'], 'cdrom-test': files('boot-sector.c'),